| Name | Author | Source | Citation | Year |
|---|
| Closterium acerosum | (Schrank) Ehrenberg | Symb. phys. 4(Anim. evertebr.): | [6] | 1831 |
| Closterium acuminatum | Corda | Alman. Carlsbad | 5: 190, 191, 198, pl. V: figs. 59, 60 | 1835 |
| Closterium caudatum | Corda | Alman. Carlsbad | 5: 190, pl. V: fig. 66 | 1835 |
| Closterium costatum | Corda | Alman. Carlsbad | 5: 185, 190, 191, 194, pl.V: figs. 61-63 | 1835 |
| Closterium didymotocum | Corda | Alman. Carlsbad | 5: 185, 190, 191, 192, pl. V: figs. 64, 65 | 1835 |
| Closterium spirale | Corda | Alman. Carlsbad | 5: 190, 194, pl. V: fig. 67 | 1835 |
| Closterium lamellosum | Brébisson ex Brébisson & Godey | Alg. Falaise: | 59, pl. VIII, p.p. | 1835 |
| Ceratoneis closterium | Ehrenberg | Ber. Königl. Akad. Wiss. Berlin | 1839: 157 | 1839 |
| Closterium trabeculoides | Corda | Alman. Carlsbad | 10: 218, pl. VI: figs. 44, 45 | 1840 |
| Closterium obtusangulum | Corda | Alman. Carlsbad | 10: 220, pl. VI: figs. 42, 43 | 1840 |
| Closterium quadrangulare | Corda | Alman. Carlsbad | 10: 221, pl. VI: figs. 46, 47 | 1840 |
| Closterium curtum | Brébisson ex Kützing | Phyc. germ.: | 132 | 1845 |
| Closterium dilatatum | Kützing | Phyc. germ.: | 132 | 1845 |
| Closterium acuminatum | Kützing | Phyc. germ.: | 130 | 1845 |
| Closterium jenneri | Ralfs | Brit. Desmid.: | 167, pl. XXVIII: fig. 6 | 1848 |
| Closterium cuspidatum | Bailey ex Ralfs | Brit. Desmid.: | 219, pl. XXXV: fig. 11 | 1848 |
| Closterium obtusangulum | Corda in Ralfs | Brit. Desmid.: | 221, pl. 6: fig. 42 in Corda, Almanach Carlsbad 10. 1940 | 1848 |
| Closterium quadrangulare | Corda in Ralfs | Brit. Desmid.: | 221, pl. 6: fig. 46 in Corda, Almanach Carlsbad 10. 1840 | 1848 |
| Closterium costatum | Corda ex Ralfs | Brit. Desmid.: | 170, pl. XXIX: fig. 1 | 1848 |
| Closterium didymotocum | Corda ex Ralfs | Brit. Desmid.: | 168, pl. XXVIII: fig. 7 | 1848 |
| Closterium arcuatum | Brébisson ex Ralfs | Brit. Desmid.: | 219 | 1848 |
| Closterium angustatum | Kützing ex Ralfs | Brit. Desmid.: | 219 | 1848 |
| Closterium gracile | Brébisson ex Ralfs | Brit. Desmid.: | 221 | 1848 |
| Closterium lanceolatum | Kützing ex Ralfs | Brit. Desmid.: | 164, pl. XXVIII: fig. 1 | 1848 |
| Closterium ralfsii | Brébisson ex Ralfs | Brit. Desmid.: | 174, pl. XXX: fig. 2 | 1848 |
| Closterium uncinatum | Kützing ex Ralfs | Brit. Desmid.: | 220 | 1848 |
| Closterium venus | Kützing ex Ralfs | Brit. Desmid.: | 220, pl. XXXV: fig. 12 | 1848 |
| Closterium moniliferum | Ehrenberg ex Ralfs | Brit. Desmid.: | 166, pl. XXVIII: fig. 3 | 1848 |
| Closterium parvulum | Nägeli | Gatt. Einzell. Alg: | 106, pl. VI: C, fig. 2 | 1849 |
| Closterium lineolatum | Kützing | Sp. alg.: | 165 | 1849 |
| Closterium ceratium | Perty | Kenntn. Kleinst. Lebensf.: | 206, pl. XVI: fig. 21 | 1852 |
| Closterium incurvum | Brébisson | Mém. Soc. Imp. Sci. Nat. Cherbourg | 4: 150, pl. II: fig. 4 | 1856 |
| Closterium obtusum | Brébisson | Mém. Soc. Imp. Sci. Nat. Cherbourg | 4: 154, pl. II: fig. 4 | 1856 |
| Closterium decorum | Brébisson | Mém. Soc. Imp. Sci. Nat. Cherbourg | 4: 151, pl. II: fig. 39 | 1856 |
| Closterium elegans | Brébisson | Mém. Soc. Imp. Sci. Nat. Cherbourg | 4: 156, pl. II: fig. 44 | 1856 |
| Closterium kuetzingii_('Kützingii') | Brébisson | Mém. Soc. Imp. Sci. Nat. Cherbourg | 4: 156, pl. II: fig. 40 | 1856 |
| Closterium macilentum | Brébisson | Mém. Soc. Imp. Sci. Nat. Cherbourg | 4: 153, pl. II: fig. 36 | 1856 |
| Closterium praelongum | Brébisson | Mém. Soc. Imp. Sci. Nat. Cherbourg | 4: 152, pl. II: fig. 41 | 1856 |
| Closterium pronum | Brébisson | Mém. Soc. Imp. Sci. Nat. Cherbourg | 4: 157, pl. II: fig. 42 | 1856 |
| Closterium regulare | Brébisson | Mém. Soc. Imp. Sci. Nat. Cherbourg | 4: 148, pl. II: fig. 35 | 1856 |
| Closterium strigosum | Brébisson | Mém. Soc. Imp. Sci. Nat. Cherbourg | 4: 153, pl. II: fig. 43 | 1856 |
| Closterium subtile | Brébisson | Mém. Soc. Imp. Sci. Nat. Cherbourg | 4: 155, pl. II: fig. 48 | 1856 |
| Closterium directum | Archer | Quart. J. Micr. Sc., ser. 2, | 2: 249, pl. XII: figs. 23, 24 | 1862 |
| Closterium pritchardianum | Archer | Quart. J. Micr. Sc., ser. 2, | 2: 250, pl. XII: figs. 25-27 | 1862 |
| Nitzschiella closterium | (Ehrenberg) Rabenhorst | Fl. Eur. Alg. | I: 163 | 1864 |
| Closterium malinvernianum | De Notaris | Erb. Critt. Ital. | Fasc. 26: no. 1254 | 1865 |
| Closterium malinvernicum | De Notaris | Hedwigia | 5: 43 | 1866 |
| Closterium pronum f. pritchardianum_('pritshardianum') | (Archer) Reinsch | Algenfl. Franken: | 188 | 1866 |
| Closterium cynthia | De Notaris | Elem. Desmid. Ital.: | 65, pl. VII: fig. 71 | 1867 |
| Closterium ehrenbergii var. malinvernianum | (De Notaris) Rabenhorst | Fl. Eur. Alg. | 3: 131 | 1868 |
| Nitzschia closterium var. reversa | (W. Smith) Hauck | Österr. Bot. Z. | 22: 332 | 1872 |
| Closterium acerosum var. maximum | H.C. Wood | Smithsonian Contr. Knowl. | 19{3}: 111, pl. XI: fig. 5 | 1873 |
| Closterium areolatum | H.C. Wood | Smithsonian Contrib. Knowl. | 19{3}: 111, pl. XI: fig. 6 | 1873 |
| Closterium monotaenium | Archer | Quarterly Journal of Microscopical Science, ser. 2, | 16: 415, no fig. | 1876 |
| Closterium oncosporum | Nordstedt | Öfvers. K. [Svenska] Vet.-Akad. Förh. | 34{3}: 16, pl. II: fig. 1 | 1877 |
| Closterium capillare | Delponte | Mem. Reale Accad. Sci. Torino, ser. 2, | (Cl. Sci. Fis. e Mat.): 110, pl. XVIII: figs. 15-19 | 1878 |
| Closterium medioleve | Archer | Quarterly Journal of Microscopical Science, ser. 2, | 18: 214, no fig. | 1878 |
| Closterium striolatum var. costatum | Klebs | Schr. Phys.-Ökon. Ges. Königsberg | 20: 14 | 1879 |
| Closterium turgidum var. didymotocum | (Corda ex Ralfs) Klebs | Schr. Phys.-Ökon. Ges. Königsberg | 20: 20 | 1879 |
| Closterium rostratum var. kuetzingii | (Brébisson) Klebs | Schr. Phys.-Ökon. Ges. Königsberg | 20: 18 | 1879 |
| Closterium intermedium var. directum | (Archer) Klebs | Schr. Phys.-Ökon. Ges. Königsberg | 20: 16 | 1879 |
| Closterium crassestriatum | Archer | Quarterly Journal of Microscopical Science, ser. 2, | 19: 120, no fig. | 1879 |
| Closterium subcostatum | Nordstedt in Wittrock & Nordstedt | Bot. Not. | 1880: 119, no fig. | 1880 |
| Closterium turgidum subsp. giganteum | Nordstedt in Wittrock & Nordstedt | Bot. Not. | 1880: 120, no fig. | 1880 |
| Closterium turgidum f. brasiliense_('brasiliensis') | Nordstedt in Wittrock & Nordstedt | Bot. Not. | 1880: 120, no fig. | 1880 |
| Closterium didymotocum var. irregulare | J. Schaarschmidt | Magyar Tud. Akad. Math. Termész. Köz. | 18: 275, no fig. | 1883 |
| Closterium fusiforme | F. Gay | Mon. loc. Conj.: | 74, pl. II: fig. 16 | 1884 |
| Closterium gigas | F. Gay | Mon. loc. Conj.: | 73, pl. II: fig. 15 | 1884 |
| Closterium littorale | F. Gay | Mon. loc. Conj.: | 75, pl. II: fig. 17 | 1884 |
| Closterium peracerosum | F. Gay | Mon. loc. Conj.: | 75, pl. II: fig. 18 | 1884 |
| Closterium tetractinium | F. Gay | Mon. loc. Conj.: | 73, pl. II: fig. 14 | 1884 |
| Closterium tumidulum | F. Gay | Mon. loc. Conj.: | 72, pl. II: fig. 13 | 1884 |
| Closterium leibleinii var. angulatum | Balsamo | Atti [Reale] Accad. Sci. Fis. e Mat. [Napoli], ser. 2, | 1{14}: 37, pl. I: figs. 16-18 | 1885 |
| Closterium eboracense | W.B. Turner in M.C. Cooke | Brit. desm. | 37 | 1886 |
| Closterium hammeri var. hibernicum | W. Archer in M.C. Cooke | Brit. desm. | 81, pl. XXXVI: fig. 5 | 1886 |
| Closterium pseudonitidulum var. obsoletum | M.C. Cooke | Brit. desm. | 88, pl. XLII: fig. 15 | 1886 |
| Closterium speciosum | W.B. Turner | Transactions of the Leeds Naturalists' Club | 1: 78, pl. 1: fig. 17 | 1886 |
| Closterium kuetzingii var. vittatum | Nordstedt | Bot. Not. | 1887: 163, no fig. | 1887 |
| Closterium praelongum f. brevius_('brevior') | Nordstedt | K. Svenska Vet.-Akad. Handl., ser. 4, | 22{8}: 68, pl. III: figs. 22-24 | 1888 |
| Closterium subdirectum | W. West | J. Roy. Micr. Soc. | 1889: 17, pl. II: fig. 10; pl. III: fig. 16 | 1889 |
| Closterium decorum f. gracilius | Maskell | Trans. & Proc. N.Z. Inst. | 21: 30, pl. VI: fig. 58 | 1889 |
| Closterium intermedium var. spirostriolatum | Raciborski | Pam. Akad. Umiej. Krakowie, Mat.-Przyr. | 17: 75, pl. VIII (=III legend, VIII text): fig. 20 | 1889 |
| Closterium mediolaeve | W. Archer ex De Toni | Syll. Alg. | 1: 853, no fig. | 1889 |
| Closterium intermedium var. sculptum | Raciborski | Pam. Akad. Umiej. Krakowie, Mat.-Przyr | 17: 75, pl. VII (=III legend, VIII text): fig. 19 | 1889 |
| Closterium turgidum var. giganteum | (Nordstedt) De Toni | Syll. Alg. | 1: 828 | 1889 |
| Closterium turgidum var. brasiliense | (Nordstedt) De Toni | Syll. Alg. | 1: 828 | 1889 |
| Closterium pseudodianae | Roy | Scottish Naturalist | 27: 201 | 1890 |
| Closterium hyacinthi | Gutwiński | Bot. Centralbl. | 43: 70 | 1890 |
| Closterium leibleinii var. minus | Reinsch | Int. Polarforsch. 1882-1883, Deutsch. Exped. Ergebn. | 2: 353, pl. II: fig. 11 | 1890 |
| Closterium scoticum | W.B. Turner | Naturalist | 1893: 347 | 1893 |
| Closterium leibleinii f. boergesenii | Schmidle | Ber. Deutsch. Bot. Ges.r | 11: 548, pl. II: fig. 7 in Borgesen, Algen Brasil | 1894 |
| Closterium maximum | (H.C. Wood) Schmidle in Wittrock, Nordstedt & Lagerheim | Alg. Aq. Dulc. Exsicc. | no. 1392 | 1896 |
| Closterium maximum | De Wildeman | Ann. Soc. Belge Microscop. | 22(Bull.): 146 | 1896 |
| Closterium pseudospirotaenium var. variabile | Lemmermann | ForschBer. Biol. Sta. Plön | 4: 119, figs. 12-14 | 1896 |
| Closterium dilatatum | W. West & G.S. West | Trans. Linn. Soc. London, Bot. | 5: 237, pl. 13: figs. 20-22 | 1896 |
| Closterium turgidum f. attenuatum_('attenuata') | Eichler | Pamietnik Fizyjograficzny | 14{Dzial 3}: 125, fig. 12 | 1896 |
| Closterium maximum | De Wildeman | Ann. Jard. Bot. Buitenzorg, Suppl. | 1: 88, pl. XIX: figs. 18-20 | 1897 |
| Closterium gracile var. capillare | (Delponte) Chodat | Bull. Herb. Boissier | 5: 301 | 1897 |
| Closterium subtruncatum | W. West & G.S. West | J. Linn. Soc., London. Botany | 33: 159, pl. 8: fig. 4 | 1897 |
| Closterium massartii_(`massarti') | De Wildeman | Ann. Soc. Belge Microscop. | 24(Bull.): 105 | 1898 |
| Closterium nordstedtii | Chodat | Bull. Herb. Boissier | 6: 185, no fig. | 1898 |
| Closterium angustatum var. speciosum | (W.B. Turner) W. Schmidle | Bih. K. Svenska Vet.-Akad. Handl. | 24{Afd.III,8}: 13 | 1898 |
| Closterium peracerosum var. elegans | G.S. West | J. Bot. (London) | 37: 111, pl. 396: figs. 1, 2 | 1899 |
| Closterium oligocampylum | Schmidle | Österr. Bot. Z. | 49: 1, fig. 5 | 1899 |
| Closterium jenneri var. robustum | G.S. West | J. Bot. (London) | 37: 112, pl. 396: fig. 9 | 1899 |
| Closterium anastomosum | West & G.S. West | Trans. Linn. Soc. London, Bot. | 6: 137, pl. 18: figs. 24-26 | 1902 |
| Closterium subcompactum | West & G.S. West | Trans. Linn. Soc. London, Bot. | 6: 137, pl. 18: fig. 11 | 1902 |
| Closterium nordstedtii | Gutwiński | Bull. Int. Acad. Sci. Cracovie, Cl. Sc. Math. et Nat. | 1902: 583, pl. XXXVI: fig. 16 | 1902 |
| Closterium wittrockianum var. africanum | Schmidle | Bot. Jahrb. | 32: 65, pl. I: fig. 14 | 1902 |
| Closterium tenuissimum | Max Schmidt | Grundlagen einer Algenflora der Lüneburger Heide: | 16, pl. I: fig. 5 | 1903 |
| Closterium cynthia var. curvatissimum | W. West & G.S. West | J. Linn. Soc., London. Botany | 35: 537, pl. 14: fig. 3 | 1903 |
| Closterium heimerlianum | (Schmidle) Lütkemüller | Ver. Zool.-Bot. Ges. Wien | 55: 337 | 1905 |
| Closterium magellanicum | Borge | Botaniska studier tillägnade F.R. Kjellman ...: | 30, pl. II: fig. 8 | 1906 |
| Closterium gibbum | Borge | Ark. Bot. | 6{1}: 18, pl. 1: fig. 10 | 1906 |
| Closterium nilssonii | Borge | Ark. Bot. | 6{1}: 16, pl. 1: fig. 8 | 1906 |
| Closterium cornutum | Playfair | Proc. Linn. Soc. N.S.W. | 32: 166, pl. II: fig. 13 | 1907 |
| Closterium novae-angliae | J.A. Cushman | Bull. Torrey Bot. Club | 35: 131, pl. 4: fig. 1 | 1908 |
| Closterium didymotocum var. alpinum | Viret | Bull. Soc. Bot. Genéve, ser. 2, | 1: 253, pl. III: fig. 1a | 1909 |
| Nitzschia closterium f. minutissima | E.J. Allen & E.W. Nelson | J. Mar. Biol. Assoc. U.K. | 8: 426, 462 | 1910 |
| Closterium didymotocum f. glabra | J. Traunsteiner & M. Traunsteiner | Zeitschrift des Ferdinandeums für Tirol und Vorarlberg | 54: 351 | 1910 |
| Closterium angustatum f. elongatum_('elongata') | J. Traunsteiner & M. Traunsteiner | Zeitschrift des Ferdinandeums für Tirol und Vorarlberg | 54: 351, no fig. | 1910 |
| Closterium abruptum f. majus_('major') | J. Traunsteiner & M. Traunsteiner | Zeitschrift des Ferdinandeums für Tirol und Vorarlberg | 54: 351, no fig. | 1910 |
| Closterium kuetzingii f. hybridum_('hybrida') | J. Traunsteiner & M. Traunsteiner | Zeitschrift des Ferdinandeums für Tirol und Vorarlberg | 54: 352, no fig. | 1910 |
| Closterium subulatum f. majus_('major') | J. Traunsteiner & M. Traunsteiner | Zeitschrift des Ferdinandeums für Tirol und Vorarlberg | 54: 352 (G) | 1910 |
| Closterium spetsbergense | Borge | Skr. VidenskSelsk. Kristiania, Mat.-Naturv. Kl. | 1911{11}: 8 fig. 5 | 1911 |
| Closterium tumidum var. sphaerosporum_('sphaerospora') | G.S. West | J. Bot. (London) | 49: 84, text-fig. 1 | 1911 |
| Closterium pronum var. protuberans | E.N. Bolokhontsev | Botanical-biological studies of Lake Ladoga: | 352 | 1911 |
| Closterium jenneri var. hibernicum | W. West | Proc. Roy. Irish Acad. | 31{16}: 12, no fig. | 1912 |
| Closterium methuenii_('Methueni') | F.E. Fritsch | Annales de Biologie Lacustre | 7: 44, pl. I: fig. 7 | 1914 |
| Closterium leibleinii var. boergesenii | (Schmidle) Y.V. Roll | Trudy Obshch. Isp. Prir. Kharkov, Univ. | 47{2}: 187 | 1915 |
| Closterium juncidum var. robustius | Lobik | Bull. Jard. Imper. Bot., St. Petersburg | 1915: 325 | 1915 |
| Closterium kuetzingii f. brevius | A.I. Lobik | Izv. Imp. Bot. Sada Petra Velikago | 16 (Suppl. 2): 13 | 1916 |
| Closterium baillyanum var. alpinum | (Viret) Grönblad | Acta Soc. Fauna et Flora Fenn | 46{5}: 13 | 1919 |
| Closterium brebissonii var. substriatum | Grönblad | Acta Soc. Fauna et Flora Fenn. | 47{4}: 15, pl. IV: fig. 2 | 1920 |
| Closterium subscoticiforme | Grönblad | Acta Soc. Fauna et Flora Fenn. | 47{4}: 24, pl. IV: fig. 5 | 1920 |
| Closterium ulna var. constrictum | Strøm | Nyt Mag. Naturv. | 57: 164 | 1920 |
| Closterium pseudolibellula | Fritsch in Fritsch & Stephens | Trans. Roy. Soc. S. Afr. | 9: 24, fig. 7A,D | 1921 |
| Closterium tumidum var. nylandicum | Grönblad | Acta Soc. Fauna et Flora Fenn. | 49{7}: 7, pl. V: figs. 38-41 | 1921 |
| Closterium recurvatum | Roll | Bot. Mater. Inst. Spor. Rast., Bot. Sada R.S.F.S.R. | 2: 38, fig. 6 | 1923 |
| Closterium submoniliferum | Woronichin | Bot. Mater. Inst. Spor. Rast., Bot. Sada R.S.F.S.R. | 3: 85 | 1924 |
| Closterium submoniliferum f. incoloratoglabrum_('incolorato-glabra') | Woronichin | Bot. Mater. Inst. Spor. Rast., Bot. Sada R.S.F.S.R. | 3: 85 | 1924 |
| Closterium submoniliferum f. coloratoglabrum_('colorato-glabra') | Woronichin | Bot. Mater. Inst. Spor. Rast., Bot. Sada R.S.F.S.R. | 3: 85 | 1924 |
| Closterium submoniliferum f. incoloratostriatum_('incolorato-striata') | Woronichin | Bot. Mater. Inst. Spor. Rast., Bot. Sada R.S.F.S.R. | 3: 85 | 1924 |
| Closterium verrucosum | Roll | Russ. Arkh. Protist. | 4: 147 (R), 150, pl. VI: fig. 48 | 1925 |
| Closterium stellenboschense | Hodgetts | Trans. Roy. Soc. S. Afr. | 13: 74, fig. 8A-C | 1925 |
| Closterium libellula f. minus | Beck-Mannagetta | Ve\*vstn. Král. C\*veské Společn. Nauk, Tr\*v. Mat.-Pr\*vír. [Mém. Soc. Roy. Sci. Bohe\*^me, Cl. Sci.] | 1926{10}: 5 | 1927 |
| Closterium punctatum | Skuja | Acta Hort. Bot. Univ. Latv. | 3: 135, pl. II: figs. 13-16 | 1928 |
| Closterium abruptum f. majus_('major') | Huber-Pestalozzi | Arch. Hydrobiol. | 19: 678, no fig. | 1928 |
| Closterium infractum | Messikommer | Vierteljahrsschr. Naturf. Ges. Zürich | 74: 149, pl. I: fig. 1 | 1929 |
| Closterium rostratum var. longirostratum | Eggert | Ber. Naturf. Ges. Freiburg Briesgau | 29: 250, figs. 1-5 | 1929 |
| Closterium peracerosum var. arcuatus | F.E. Fritsch & M.F. Rich | Trans. Roy. Soc. S. Afr. | 18: 56, fig. 16A,B | 1929 |
| Closterium spetsbergense var. africanum | F.E. Fritsch & M.F. Rich | Trans. Roy. Soc. S. Afr. | 18: 57, fig. 16C-G | 1929 |
| Closterium polymorphum | G. Nygaard in Berg & Nygaard | K. Danske Vidensk. Selsk. Naturvidensk. og Math. Afd. 9.Raekke | 1: 312, fig. 27, pl. III: figs. 34-38 | 1929 |
| Closterium subrostratum | W. Krieger | Arch. Hydrobiol. Suppl. | 11: 164, pl. V: figs. 8, 9 | 1932 |
| Closterium fulvum | I.F. Lewis, C. Zirkle, & R. Patrick | J. Elisha Mitchell Soc. | 48: 222, pl. 16: figs. 4-6 | 1933 |
| Closterium ranunculi | I.F. Lewis, C. Zirkle, & R. Patrick | J. Elisha Mitchell Soc. | 48: 222, pl. 16: figs. 1-3 | 1933 |
| Closterium didymotocum f. rectum_('recta') | K. Rosa | C\*vasopis Národního Musea | 107: 131, fig. 5 | 1933 |
| Closterium pritchardianum var. lerschii | E. Kol | Acta Litt. ac Sc. R. Univ. Hung. Franc.-Jos. [Szeged], Biol. Sc. Nat. [=Acta Biol.] | 2: 226 | 1933 |
| Closterium ulna var. anastomosum | (West & G.S. West) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13{1,2}: 342 | 1935 |
| Closterium libellula var. punctatum | (Raciborski) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 256 | 1935 |
| Closterium navicula var. granulatum | (West & G.S. West) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 258 | 1935 |
| Closterium navicula var. subcompactum | (West & G.S. West) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 259 | 1935 |
| Closterium acutum var. ceratium | (Perty) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 261 | 1935 |
| Closterium acutum var. latius | Grönblad in W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 261, pl. 13: fig. 23 | 1935 |
| Closterium acutum var. variabile | (Lemmermann) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 262 | 1935 |
| Closterium acutum var. maius | W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 263, pl. 13: fig. 9 | 1935 |
| Closterium polystictum var. nordstedtii | (Chodat) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 266 | 1935 |
| Closterium idiosporum var. punctatum | W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 272 | 1935 |
| Closterium venus var. incurvum | (Brébisson) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 273 | 1935 |
| Closterium venus var. westii | W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 274, pl. 16: fig. 9 | 1935 |
| Closterium venus var. verrucosum | (Roll) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 274 | 1935 |
| Closterium parvulum var. cornutum | (Playfair) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 277 | 1935 |
| Closterium ehrenbergii var. atumidum | W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 287, no fig. | 1935 |
| Closterium moniliferum var. submoniliferum | (Woronichin) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 292 | 1935 |
| Closterium dianae var. pseudodianae | (Roy) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 297 | 1935 |
| Closterium dianae var. stellenboschense | (Hodgetts) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 297 | 1935 |
| Closterium strigosum var. arcuatum | W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 300, pl. 20: fig. 11 | 1935 |
| Closterium strigosum var. elegans | (G.S. West) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 300 | 1935 |
| Closterium lunula var. massartii | (De Wildeman) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 304 | 1935 |
| Closterium pseudolunula var. pseudolibellula | (Fritsch) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 305 | 1935 |
| Closterium balmacarense var. scoticum | (W.B. Turner) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 306 | 1935 |
| Closterium gracile var. striolatum | W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 312, pl. 30: fig. 13 | 1935 |
| Closterium macilentum var. substriatum | (Grönblad) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 314 | 1935 |
| Closterium acerosum var. borgei | W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 317, pl. 24: fig. 3 | 1935 |
| Closterium pritchardianum var. africanum | (F.E. Fritsch & M.F. Rich) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 322 | 1935 |
| Closterium praelongum var. porosum | W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 324, pl. 25: fig. 10 | 1935 |
| Closterium baillyanum var. rectum | (Rosa) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 329 | 1935 |
| Closterium paludosum | Thunmark in W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 329, no fig. | 1935 |
| Closterium turgidum f. bohemicum_('bohemica') | Rosa in W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 332, pl. 27: figs. 7, 8 | 1935 |
| Closterium subscoticum var. subscoticiforme | (Grönblad) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 333 | 1935 |
| Closterium striolatum var. borgei | W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 339, pl. 28: fig. 11 | 1935 |
| Closterium striolatum var. subdirectum | (W. West) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 340 | 1935 |
| Closterium striolatum var. subtruncatum | (W. West & G.S. West) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 340 | 1935 |
| Closterium ulna var. oligocampylum | (Schmidle) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 342 | 1935 |
| Closterium ulna var. recurvatum | (Roll) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 343 | 1935 |
| Closterium ralfsii var. gracilius | (Maskell) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 346 | 1935 |
| Closterium ralfsii var. novae-angliae | (J.A. Cushman) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 348 | 1935 |
| Closterium delpontei var. nordstedtii | W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 349 | 1935 |
| Closterium lineatum var. africanum | (Schmidle) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 350 | 1935 |
| Closterium kuetzingii var. laeve | W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 353, pl. 32: fig. 10 | 1935 |
| Closterium rostratum var. borgei | W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 355, pl. 33: fig. 4 | 1935 |
| Closterium rostratum var. oncosporum | (Nordstedt) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 355 | 1935 |
| Closterium rostratum var. subrostratum | (W. Krieger) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 356 | 1935 |
| Closterium costatum var. dilatatum | (W. West & G.S. West) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 359 | 1935 |
| Closterium costatum var. erectum | Grönblad in W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 359, no fig. | 1935 |
| Closterium costatum var. spirostriolatum | (Raciborski) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 360 | 1935 |
| Closterium costatum var. subcostatum | (Nordstedt) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 360 | 1935 |
| Closterium cynthia var. jenneri | (Ralfs) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 366 | 1935 |
| Closterium cynthia var. robustum | (G.S. West) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 368 | 1935 |
| Closterium praelongum var. brevius | (Nordstedt) W. Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 324 | 1935 |
| Closterium abruptum var. maius | Krieger | Rabenhorst's Krypt.-Fl. Deutschl., 2.Aufl., | 13(1,2): 308 | 1935 |
| Closterium rostratum var. longirostratum | Alcorn | Occas. Pap. Coll. Puget Sound | 6-11(10): 48, pl. 2: figs. 20, 20a | 1940 |
| Closterium subcostatum | Alcorn | Occas. Pap. Coll. Puget Sound | 6-11: 48, fig. 19 | 1940 |
| Closterium setaceum var. vittatum | (Nordstedt) Grönblad | Acta Soc. Sci. Fenn. n.s.B | 2{6}: 10 | 1945 |
| Closterium libellula var. angusticeps | Grönblad | Acta Societatis Scientarum Fennicae, n.s.B | 2{6}: 9, fig. 12 | 1945 |
| Closterium moniliferum f. subrectum | V.I. Poljansky | Ref. Nauchno-Issl. Rabot, Otdelenie Biol. Nauk | 1942-1947: 11 | 1947 |
| Closterium incomptum | Woodhead & Tweed | North Western Naturalist | 23: 24, fig. 20 | 1948 |
| Closterium lineatum f. elongatum | Rosa | Stud. Bot. C\*vech. | 12: 200, 226, pl. VI: fig. 3 | 1951 |
| Closterium archerianum f. majus | Irénée-Marie | Nat. Canad. | 81: 14, pl. I: fig. 1 | 1954 |
| Closterium ehrenbergii f. majus_('major') | Irénée-Marie | Nat. Canad. | 82: 122, pl. I: fig. 7 | 1955 |
| Closterium tumidum f. majus_('major') | Irénée-Marie | Nat. Canad. | 86: 213, fig. 10 | 1955 |
| Closterium lineatum var. elongatum | (Rosa) Croasdale | Farlowia | 4: 525 | 1955 |
| Closterium sublaterale | Ru\*oz\*vička | Preslia | 27: 142, fig. 1:14,15 | 1957 |
| Closterium ehrenbergii f. majus_('major') | Irénée-Marie | Rev. Alg. n.s. | 4: 97, fig. 2 | 1958 |
| Closterium abruptum var. elongatum | K. Leher | Berichte der Bayerischen Botanischen Gesellschaft zur Erforschung der Flora | 32: 74, no fig. | 1958 |
| Closterium acerosum var. rollianum | Kosinskaya | Fl. Spor. Rast. SSSR | 5: 167, pl. XII: fig. 9 | 1960 |
| Closterium pseudolunula | Claassen | Bothalia | 7: 575, pl. 4: fig. 1 | 1961 |
| Closterium fusiforme | M. Noda | J. Fac. Sci., Niigata Univ., ser. 2, | 4: 141, pl. 8: fig. 2 | 1963 |
| Closterium linearifusiforme | M. Noda | J. Fac. Sci., Niigata Univ., ser. 2, | 4: 142, pl. 8: fig. 1 | 1963 |
| Closterium pritchardianum f. brasiliense | Kurt Förster & Eckert in Eckert | Rev. Algol., ser. 2, | 7: 45, pl. 1: fig. 9; pl. 8: fig. 2 | 1963 |
| Closterium porrectum var. borgei | K. Förster | Hydrobiologia | 23: 340, pl. 1: fig. 15 | 1964 |
| Closterium moniliferum f. giganteum | K. Förster | Ber. Bayer. Bot. Ges. | 37: 50, pl. 1: fig. 1 | 1964 |
| Closterium lineatum var. curvatum | K. Thomasson | Exploration hydrobiologique du bassin du lac Bangweolo et du Luapula | 4(2): 19, pl. IV: fig. 5 | 1966 |
| Closterium ehrenbergii f. angustum | K. Förster | Amazoniana | 2: 20, pl. 3: 2, 3 | 1969 |
| Closterium kuetzingii f. croasdaleae | K. Förster | Amazoniana | 2: 21, pl. 4: 12 | 1969 |
| Closterium regulare f. minus | K. Förster | Amazoniana | 2: 24, pl. 3: 14-16 | 1969 |
| Closterium coronatum f. minus | K. Förster | Amazoniana | 2: 25, pl. 6: figs. 16, 17 | 1969 |
| Closterium abruptum f. majus_('major') | Noda & Skvortzov | Science Reports of Niigata University, Biol. | 6: 68, fig. 25 | 1969 |
| Closterium lunula f. crassissimum | Croasdale in Grönblad & Croasdale | Acta Bot. Fennica | 93: 7, pl. I: fig. 10 | 1971 |
| Closterium costatum var. borgei | (W. Krieger) J. Ru\*oz\*vička | Arch. Protistenk. | 114: 458 | 1972 |
| Closterium archerianum var. pseudocynthia | Ru\*oz\*vička | Preslia | 45: 198, pl. 1: 17, 18; pl. 5: 9 | 1973 |
| Closterium angustatum f. multistriatum | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 32, pl. XXVI: figs. 2-2b | 1975 |
| Closterium archerianum f. grande | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 34 | 1975 |
| Closterium arcuarium var. brevius | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 35, pl. XIX: fig. 7 | 1975 |
| Closterium attenuatum f. abbreviatum | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 35, pl. XXX: figs. 15, 15a | 1975 |
| Closterium calosporum f. erectum | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 39, pl. XXXVI: figs. 11, 14 | 1975 |
| Closterium costatum f. rectum | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 42, pl. XXXIII: fig. 12 | 1975 |
| Closterium costatum var. scottii | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 43, pl. XXXIII: figs. 1-3 | 1975 |
| Closterium costatum f. inflatum | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 43, pl. XXXIII: fig. 4 | 1975 |
| Closterium ehrenbergii f. magnum | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 49 | 1975 |
| Closterium ehrenbergii f. grande | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 50 | 1975 |
| Closterium lineatum var. elongatissimum | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 64, pl. XXXII: figs. 6, 6a | 1975 |
| Closterium navicula var. inflatum | (W. West & G.S. West) H. Croasdale in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 72 | 1975 |
| Closterium parvulum f. maximum | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 74, pl. XXIV: fig. 6 | 1975 |
| Closterium praelongum f. longissimum | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 77, pl. XXVIII: fig. 12 | 1975 |
| Closterium pulchellum f. grande | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 80, pl. XXV: fig. 2 | 1975 |
| Closterium rostratum var. extensum | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 84 | 1975 |
| Closterium tacomense | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 91 | 1975 |
| Closterium tumidum f. irenee-mariei_('irenee-mariae') | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 92 | 1975 |
| Closterium ulna f. maius | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 95, pl. XXIX: fig. 14 | 1975 |
| Closterium ulna f. striatum | G.W. Prescott in Prescott, Croasdale & Vinyard | Syn. N. Amer. Desmids | II{1}: 95, pl. XXIX: fig. 15, 15a, 16 | 1975 |
| Closterium sinense var. minus | M. Hirano | Contrib. Biol. Lab. Kyoto Univ. | 24: 194, pl. 1: fig. 2 | 1975 |
| Closterium abruptum var. majus_('maius') | (J. Traunsteiner & M. Traunsteiner) Ru\*oz\*vička | Preslia | 47: 198 | 1975 |
| Closterium biclavatum f. australiense | A.M. Scott ex H. Croasdale in Croasdale & Scott | Nova Hedwigia | 27: 507, pl. 1:5 | 1976 |
| Closterium calosporum var. himalayense | M. Watanabe | Bull. Natl. Sci. Mus., Tokyo, Ser. B (Bot.), | 5: 16, pls. in Watanabe 1978, (Bull. Natl. Sci. Mus., Tokyo, Ser. B, 4(4): pl. VII: figs. 1-9, pl. VIII: figs. 1-3, pl. IX: figs. 1-3) | 1979 |
| Closterium selenastrum | M. Watanabe | Bull. Natl. Sci. Mus., Tokyo, Ser. B (Bot.), | 5: 17, pl. IX: fig. 6; pls. in Watanabe 1978 (Bull. Natl. Sci. Mus., Tokyo, Ser. B, 4(4): pl. VIII: figs. 4-9) | 1979 |
| Closterium spinosporum var. malayense | M. Watanabe | Bull. Natl. Sci. Mus., Tokyo, Ser. B (Bot.), | 5: 17, pl. X: fig. 5; pl. in Watanabe 1978, (Bull. Natl. Sci. Mus., Tokyo, Ser. B, 4(4): pl. I: figs. 4-9) | 1979 |
| Closterium spinosporum var. ryukyuense | M. Watanabe | Bull. Natl. Sci. Mus., Tokyo, Ser. B (Bot.), | 5: 18, pl. X: figs. 1-4; pl. in Watanabe 1978, (Bull. Natl. Sci. Mus., Tokyo, Ser. B, 4(4): pl. II: figs. 1-7) | 1979 |
| Closterium spinosporum var. crassum | M. Watanabe | Bull. Natl. Sci. Mus., Tokyo, Ser. B (Bot.), | 5: 18, pl. XI; pl. in Watanabe 1978, (Bull. Natl. Sci. Mus., Tokyo, Ser. B, 4(4): pl. IV: figs. 1-7) | 1979 |
| Closterium rostratum f. papuanum | Masayuki Watanabe apud Watanabe, Prescott, & Yamagishi in S. Kurokawa (ed.) | Studies on Cryptogams of Papua New Guinea: | 51, fig. 11 | 1979 |
| Spinoclosterium cuspidatum f. crassum | Prescott apud Watanabe, Prescott, & Yamagishi in S. Kurokawa (ed.) | Studies on Cryptogams of Papua New Guinea: | 53, fig. 13 | 1979 |
| Closterium directum var. anastomosum | (West & G.S. West) K. Förster | Arch. Hydrobiol. Suppl. | 60(3) (Algol. Stud. 28): 238 | 1981 |
| Closterium directum var. recurvatum | (Roll) K. Förster | Arch. Hydrobiol. Suppl. | 60(3) (Algol. Stud. 28): 238 | 1981 |
| Closterium kuetzingii var. croasdaleae | (K. Förster) K. Förster | Arch. Hydrobiol. Suppl. | 60(3) (Algol. Stud. 28): 238 | 1981 |
| Closterium moniliferum var. giganteum | (K. Förster) K. Förster | Arch. Hydrobiol. Suppl. | 60 (Algol. Stud. 28): 238 | 1981 |
| Closterium porrectum var. borgei | K. Förster | Arch. Hydrobiol. Suppl. | 60(3) (Algol. Stud. 28): 238, pl. 1: fig. 20 (in Borge, Ark. Bot. 1: 79. 1903) | 1981 |
| Closterium angustatum var. subclavatum | P. Bourrelly & A. Couté | Amazoniana | 7: 235, 259, pl. V: fig. 3 | 1982 |
| Closterium costatum var. multipyrenoidum | P. Bourrelly & A. Couté | Amazoniana | 7: 235, 259, pl. V: fig. 6 | 1982 |
| Closterium lineatum var. guyanense | P. Bourrelly & A. Couté | Amazoniana | 7: 236, 259, pl. VI: fig. 7 | 1982 |
| Closterium littorale f. concavum | B. Tracanna | Opera Lilloana | 35: 104, 125, pl. 44: figs. 3, 12, 13 | 1985 |
| Closterium guyanense | (P. Bourrelly & A. Couté) P.F.M. Coesel | Cryptog.: Algol. | 8: 129 | 1987 |
| Closterium arcus | A.J. Brook & D.B. Williamson | Brit. Phycol. J. | 23: 394, figs. 1-9 | 1988 |
| Closterium infractum f. majus | W. Vyverman | Nova Hedwigia | 48: 320, pl. 1: fig. 3 | 1989 |
| Closterium venus f. novum_('nova') | R. Lenzenweger | Stapfia | 22: 87, pl. I: fig. 1 | 1989 |
| Closterium balmacarense var. striatum_(`striata') | P. Bourrelly & A. Couté | Biblioth. Phycol. | 86: 17, 184, pl. V: fig. 10 | 1991 |
| Closterium lanceolatum var. elongatum | P. Bourrelly & A. Couté | Biblioth. Phycol. | 86: 23, 184, pl. VII: fig. 3 | 1991 |
| Closterium praelongum var. madagascariense_(`madagascariensis') | P. Bourrelly & A. Couté | Biblioth. Phycol. | 86: 26, 185, pl. X: fig. 6 | 1991 |
| Closterium subscoticum f. elongatum | P. Bourrelly & A. Couté | Biblioth. Phycol. | 86: 29, 185, pl. VI: fig. 1 | 1991 |
| Closterium sinuosum | D.B. Williamson | Arch. Hydrobiol. Suppl. | 99: 433, pl. 7: fig. 9 | 1994 |
| Closterium pakistanicum | Masud-ul-Hassan, T. Rasool, & M. Nizamuddin | Pakistan J. Bot. | 27: 255, 1 fig. | 1995 |
| Closterium sphaerosporum | (G.S. West) A.J. Brook | Quekett J. Microsc. | 37: 388 | 1995 |
| Closterium variabile | A.J. Brook | Quekett J. Microsc. | 37: 388, figs. 1-4 | 1995 |
| Closterium anguineum | D.B. Williamson | Bot. J. Scotland | 48: 284, figs. 1, 2 | 1996 |
| Closterium pseudokuetzingii | D.B. Williamson | Nova Hedwigia | 62: 432, figs. 1-4 | 1996 |
| Closterium forte | E.A. Flint & D.B. Williamson | Arch. Hydrobiol. Suppl. | 126 (Algol. Stud. 91): 75, pl. 2: 1 | 1998 |
| Closterium pseudopygmaeum | F.A.C. Kouwets | Arch. Hydrobiol. Suppl. | 137 (Algol. Stud. 101): 30, pl. 1: 2-8 | 2001 |
| Closterium nasutum var. kazukoae | Y. Kanetsuna | Phycol. Res. | 50: 102, figs. 1, 63 | 2002 |
| Closterium nematodes f. kriegeri | Y. Kanetsuna | Phycol. Res. | 50: 102, figs. 2, 64 | 2002 |
| Closterium karnakense | P.F.M. Coesel | Biologia, Bratislava | 58: 643, figs. 1-6 | 2003 |
| Closterium cynthia var. minutum | Y. Kanetsuna | Phycol. Res. | 52: 160, figs. 2, 47 | 2004 |
| Closterium ehrenbergii f. malinvernianum | (De Notaris) D.B. Williamson | Arch. Hydrobiol. Suppl. | 154 (Algol. Stud. 114): 88 | 2004 |
| Ceratoneis closterium var. californica | (Mereschkowsky) R. Jahn & W.-H. Kusber | Diatom Research | 20: 301 | 2005 |
| Closterium okaritoense | E.E. Flint & D.B. Williamson | New Zealand J. Botany | 43: 288, fig. 1C | 2005 |
| Closterium lanceolatum var. punctatum | R. Lenzenweger & C. Lütz | Arch. Hydrobiol. Suppl. | 162 (Algol. Stud. 119): 82, pl. 1: 1; text-fig. 2 | 2006 |
| Closterium pseudolanceolatum | R. Lenzenweger & C. Lütz | Arch. Hydrobiol. Suppl. | 162 (Algol. Stud. 119): 79 | 2006 |
| Closterium kossinskayae | A.F. Luknitskaya | Bot. Zhurn. | 91: 1705, figs. 1-3 | 2006 |
| Closterium tortitaenioides | P.F.M. Coesel | Syst. Geogr. Pl. | 77: 5 | 2007 |
| Closterium okavangicum | P.F.M. Coesel & A. Van Geest | Syst. Geogr. Pls. | 78: 30, figs. 3-5 | 2008 |
| Closterium biclavatum f. tortum | Y. Kanetsuna in Yamagishi | Plankton algae of Southeast Asia: | 162, pl. 71: figs. 3-6 | 2010 |
| Closterium porteanum f. parigranulatum | Y. Kanetsuna in Yamagishi | Plankton algae of Southeast Asia: | 162, pl. 71: figs. 15, 16 | 2010 |
| Roya pseudoclosterium f. minor | A.J. Brook & D.B. Williamson | A monograph on some British desmids: | 103 | 2010 |
| Closterium abruptum f. nilssonii | (Borge) A.J. Brook & D.B. Williamson | A monograph on some British desmids: | 197 | 2010 |
| Closterium angustatum f. sculptum | (Raciborski) A.J. Brook & D.B. Williamson | A monograph on some British desmids: | 204 | 2010 |
| Closterium juncidum f. robustius | (Lobik) A.J. Brook & D.B. Williamson | A monograph on some British desmids: | 223 | 2010 |
| Closterium nylandicum | (Grönblad) A.J. Brook & D.B. Williamson | A monograph on some British desmids: | 237 | 2010 |
| Closterium lunula var. giganteum | (Nordstedt) A.J. Brook & D.B. Williamson | A monograph on some British desmids: | 267 | 2010 |
| Closterium hibernicum | (W. West) A.J. Brook & D.B. Williamson | A monograph on some British desmids: | 309 | 2010 |
| Closterium jenneri var. curvatissimum | (W. West & G.S. West) A.J. Brook & D.B. Williamson | A monograph on some British desmids: | 314 | 2010 |
| Closterium claassenii | A. Levanets in Levanets & Van Rensburg | Desmids southern Africa: | 332 | 2011 |
| Closterium pseudocostatum | J. S\*vt\*vastný & F.A.C. Kouwets | Fottea | 12: 294, figs. 1-9, 22-27 | 2012 |
| Closterium cornu var. gibbum | (Borge) O.A. Petlovany in P.M. Tsarenko et al. (eds.) | Algae of Ukraine | 4: 80 | 2015 |
| Closterium jenneri var. cynthia | (De Notaris) O.A. Petlovany in P.M. Tsarenko et al. (eds.) | Algae of Ukraine | 4: 91 | 2015 |
| Closterium pseudolunula var. spetsbergense | (Borge) O.A. Petlovany in P.M. Tsarenko et al. (eds.) | Algae of Ukraine | 4: 111 | 2015 |
| Closterium acerosum var. rollianum | Kosinskaya ex Petlovany in P.M. Tsarenko et al. (eds.) | Algae of Ukraine 4: | 69, pl. II: fig. 26 | 2015 |
| Closterium bitangchoianum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 68, pl. XVIII: figs. 337, 338 | 2016 |
| Closterium mamenchoenum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 79, pl. X: fig. 274; pl. XI: fig. 275 | 2016 |
| Closterium pseudocynthia | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 83, pl. XX: figs. 365, 366 | 2016 |
| Closterium pseudoincurvum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 84, pl. XXII: figs. 382, 383 | 2016 |
| Closterium reticulatum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 86, pl. XV: fig. 305 | 2016 |
| Closterium sikkimicum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 88, pl. XXII: figs. 380, 381 | 2016 |
| Closterium arcuarium var. sikkimense | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 68, pl. XXI: figs. 367-369 | 2016 |
| Closterium libellula var. sikkimense | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 77, pl. XVI: figs. 314, 315 | 2016 |
| Closterium littorale var. indicum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 78, pl. XVI: fig. 318 | 2016 |
| Closterium minutum var. indicum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 80, pl. XIV: figs. 294-296 | 2016 |
| Closterium rostratum var. sikkimicum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 87, pl. XXII: figs. 378, 379 | 2016 |
| Closterium eboracense f. minutum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 71, pl. XXIII: fig. 393 | 2016 |
| Closterium ehrenbergii f. elevatum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 72, pl. XVI: figs. 312, 313 | 2016 |
| Closterium incurvum f. acutum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 75, pl. XIX: fig. 350 | 2016 |
| Closterium incurvum f. sikkimicum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 76, pl. XXIII: figs. 394, 395 | 2016 |
| Closterium parvulum f. indicum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 82, pl. XVII: figs. 244, 245 | 2016 |
| Closterium rectimarginatum f. indicum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 85, pl. XII: fig. 283 | 2016 |
| Closterium tumidulum f. indicum | J.P. Keshri & D. Das in Das & Keshri | Biblioth. Phycologica | 119: 91, pl. XVI: figs. 316, 317 | 2016 |
| Closterium joostenii | M.C. Van Westen & P.F.M. Coesel | Phytotaxa | 385: 3, figs. 1, 12-14 | 2018 |
| Closterium cynthiiforme_('cynthiaforme') | M.C. Van Westen & P.F.M. Coesel | Phytotaxa | 385: 3 | 2018 |
| Closterium closterioides var. angusticeps | (Grönblad) G.J.P. Ramos & C.W.N. Moura | Notulae algarum | 118: 1 | 2019 |
| Closterium pritchardianum var. brasiliense | (Kurt Förster & Eckert) G.J.P. Ramos & C.W.N. Moura | Notulae algarum | 118: 1 | 2019 |
| Closterium lunula var. nordstedtii | G.J.P. Ramos, C.E.M. Bicudo & C.W.N. Moura | Notulae algarum | 224: 4 | 2022 |
| Calciosolenia granii var. closterium | Schiller | image |
| Ceratoneis closterium | C.G. Ehrenberg | image |
| Ceratoneis closterium | C.G. Ehrenberg | image |
| CLOSTERIUM [section or subgenus] | STAUROCERAS (F.T. Kützing) J.E. Gray | image |
| CLOSTERIUM | C.L. Nitzsch | image |
| CLOSTERIUM | C.L. Nitzsch ex J. Ralfs | image |
| CLOSTERIUM sect. | IV. ROYA (West & G.S. West) J.N.F. Wille, H.G.A. Engler & K.A.E. Prantl | image |
| CLOSTERIUM sect. | ROSTRATA J.N.F. Wille | image |
| CLOSTERIUM section | EUCLOSTERIUM - - | image |
| CLOSTERIUM subgen. | HOLOPENIUM (F. Gay) M. Hirano | image |
| CLOSTERIUM subgenera | CLOSTERIUM C.W. Nägeli | image |
| CLOSTERIUM subgenera | SELENOCERAS W.B. Turner | image |
| CLOSTERIUM subgenus | ASTEROSELENE V.B. Wittrock | image |
| CLOSTERIUM subgenus | CLOSTERIUM C.G. Ehrenberg | image |
| CLOSTERIUM subgenus | CLOSTERIUM C.G. Ehrenberg | image |
| Closterium abruptum f. africana | F.E. Fritsch & M.F. Rich | image |
| Closterium abruptum f. angustissima | W. Schmidle | image |
| Closterium abruptum f. angustum | R.L. Grönblad | image |
| Closterium abruptum f. bohemica | K. Rosa | image |
| Closterium abruptum f. brevius_('brevior') | G.R. Cedergren | image |
| Closterium abruptum f. brevius_('brevior') | West & G.S. West | image |
| Closterium abruptum f. majus_('major') | G.E. Huber-Pestalozzi | image |
| Closterium abruptum f. minus_('minor') | Y.V. Roll | image |
| Closterium abruptum f. punctata | West | image |
| Closterium abruptum subsp. brevius | (West & G.S. West) F.M. Sarim & M.A.F. Faridi | image |
| Closterium abruptum var. brasiliense | (O.F. Borge) K. Förster | image |
| Closterium abruptum var. brevius | (West & G.S. West) West & G.S. West | image |
| Closterium abruptum var. cambricum | W. Turner | image |
| Closterium abruptum var. canadense | P. Bourrelly | image |
| Closterium abruptum var. elongatum | K.P. Biswas | image |
| Closterium abruptum var. maius | (G.E. Huber-Pestalozzi) Willi Krieger | image |
| Closterium abruptum var. majus_('major') | M. Noda & B.V. Skvortzov | image |
| Closterium abruptum var. vallesiacum | L. Viret | image |
| Closterium abruptum var. westiorum | M.I. Claassen | image |
| Closterium abruptum | West | image |
| Closterium acerosum | C.G. Ehrenberg ex J. Ralfs | image |
| Closterium acerosum f. abnormale_('abnormalis') | P.E.E. Kaiser | image |
| Closterium acerosum f. attenuata | W.B. Turner | image |
| Closterium acerosum f. colorato-glabra | N.N. Woronichin | image |
| Closterium acerosum f. elongatum | (L.A. Brebisson) E.K. Kossinskaja | image |
| Closterium acerosum f. incolorato-punctata | N.N. Woronichin | image |
| Closterium acerosum f. intermedia | R. Gutwinski | image |
| Closterium acerosum f. intermedia | R. Gutwinski | image |
| Closterium acerosum f. lanceolatum | (F.T. Kützing) P.F. Reinsch | image |
| Closterium acerosum f. longior | S.P. Petkoff | image |
| Closterium acerosum f. majus | P.F. Reinsch | image |
| Closterium acerosum f. minus_('minor') | West & G.S. West | image |
| Closterium acerosum f. rectum | A.M. Scott & G.W. Prescott | image |
| Closterium acerosum f. sigmoidea | G. Deflandre | image |
| Closterium acerosum f. sigmoideum | (N.G. Lagerheim & C.F.O. Nordstedt) T.J.C. Irenee-Marie | image |
| Closterium acerosum f. subtilissime-striatum | E.K. Kossinskaja | image |
| Closterium acerosum subsp. minus | (C.A. Hantzsch) F.M. Sarim & M.A.F. Faridi | image |
| Closterium acerosum var. africana | P. Bourrelly | image |
| Closterium acerosum var. angolense | West & G.S. West | image |
| Closterium acerosum var. angustius | E.O. Hughes | image |
| Closterium acerosum var. bonariense | S. Yacubson | image |
| Closterium acerosum var. casinoense_('casinoensis') | G.I. Playfair | image |
| Closterium acerosum var. elongatum | L.A. Brebisson | image |
| Closterium acerosum var. elongatum | West | image |
| Closterium acerosum var. kruppiana | O. Zacharias | image |
| Closterium acerosum var. kwangsiense | C.C. Jao | image |
| Closterium acerosum var. lanceolatum | (F.T. Kützing) G.A. Klebs | image |
| Closterium acerosum var. lanceolatum | (F.T. Kützing) G.I. Playfair | image |
| Closterium acerosum var. minus | C.A. Hantzsch | image |
| Closterium acerosum var. nasutum | M. Hirano | image |
| Closterium acerosum var. parvum | T. Hinode | image |
| Closterium acerosum var. porosum | M. Hirano | image |
| Closterium acerosum var. rectum | P. Palik | image |
| Closterium acerosum var. rollianum | E.K. Kossinskaja | image |
| Closterium acerosum var. sikangense | C.C. Jao | image |
| Closterium acerosum var. subangustum | G.A. Klebs | image |
| Closterium acerosum var. truncatum | R. Gutwinski | image |
| Closterium acerosum var. typicum | G.A. Klebs | image |
| Closterium acerosum var. waterbergense | M.I. Claassen | image |
| Closterium aciculare f. brevius | A. Elenkin | image |
| Closterium aciculare f. minus | P.E.E. Kaiser | image |
| Closterium aciculare f. minus_('minor') | I.A. Kisselev | image |
| Closterium aciculare | T. West | image |
| Closterium aciculare var. robustius | R.H. Chodat | image |
| Closterium aciculare var. subpronum | (West) West & G.S. West | image |
| Closterium acuminatum | F.T. Kützing | image |
| Closterium acus | (F.J.H. Müller) C.L. Nitzsch | image |
| Closterium acutum | (H.C. Lyngbye) L.A. Brebisson | image |
| Closterium acutum f. cornu | (C.G. Ehrenberg) P.F. Reinsch | image |
| Closterium acutum f. elongata | G.L. Rabenhorst | image |
| Closterium acutum f. intermedia | S.P. Petkoff | image |
| Closterium acutum f. latius_('latior') | S.P. Petkoff | image |
| Closterium acutum f. lyngbyanum | P.F. Reinsch | image |
| Closterium acutum f. minus_('minor') | F. Hustedt | image |
| Closterium acutum f. minus_('minor') | M.I. Claassen | image |
| Closterium acutum f. tenuius_('tenuior') | C.F.O. Nordstedt | image |
| Closterium acutum | L.A. Brebisson ex J. Ralfs | image |
| Closterium acutum var. linea | (J.A.M. Perty) West & G.S. West | image |
| Closterium affine | F. Gay | image |
| Closterium amblyonema | C.G. Ehrenberg | image |
| Closterium amblyonema | C.G. Ehrenberg ex J. Ralfs | image |
| Closterium amphiceps | C.C. Jao | image |
| Closterium anastomosans var. glabrum | R. Gutwinski | image |
| Closterium angustatum f. boergesenii | R. Gutwinski | image |
| Closterium angustatum f. boergesenii | R. Gutwinski | image |
| Closterium angustatum f. tenue_('tenuis') | K. Rosa | image |
| Closterium angustatum | F.T. Kützing | image |
| Closterium angustatum | F.T. Kützing ex J. Ralfs | image |
| Closterium angustatum subsp. gracilius | (H.T. Croasdale) F.M. Sarim & M.A.F. Faridi | image |
| Closterium angustatum var. annulatum | E.O. Hughes | image |
| Closterium angustatum var. asperum | West | image |
| Closterium angustatum var. clavatum | W.N. Hastings | image |
| Closterium angustatum var. gracile | E.K. Kossinskaja | image |
| Closterium angustatum var. gracilius | H.T. Croasdale | image |
| Closterium angustatum var. multinucleatum | G. Deflandre | image |
| Closterium angustatum var. pseudoboergesenii | K. Behre | image |
| Closterium angustatum var. recta | T.J.C. Irenee-Marie | image |
| Closterium angustatum var. reticulatum | F. Wolle | image |
| Closterium angustatum var. sculptum | (M. Raciborski) J. Ruzicka | image |
| Closterium angustatum var. subclavatum | P. Bourrelly & A. Coute | image |
| Closterium angustatum var. subrectum | W. Schmidle | image |
| Closterium angustum | C.A. Hantzsch | image |
| Closterium annandalei | P.J. Brühl & K.P. Biswas | image |
| Closterium antarcticum | C.G. Ehrenberg | image |
| Closterium antiacerosum | G. De Notaris | image |
| Closterium archerianum | Cleve ex P.M. Lundell | image |
| Closterium archerianum f. majus_('major') | T.J.C. Irenee-Marie | image |
| Closterium archerianum f. sigmoideum | T.J.C. Irenee-Marie & D.K. Hilliard | image |
| Closterium archerianum var. compressum | G.A. Klebs | image |
| Closterium archerianum var. cynthia | (G. De Notaris) G.A. Klebs | image |
| Closterium archerianum var. minus_('minor') | H.L. Skuja | image |
| Closterium archerianum var. pseudocynthia | J. Ruzicka | image |
| Closterium archerianum var. typicum | G.A. Klebs | image |
| Closterium arcuarium | E.O. Hughes | image |
| Closterium arcuatum | L.A. Brebisson | image |
| Closterium areolatum f. glabra | R. Gutwinski | image |
| Closterium areolatum f. simplicior | R. Gutwinski | image |
| Closterium areolatum var. affine | E.J. Lemmermann | image |
| Closterium arnoldianum | Y.V. Roll | image |
| Closterium atomicum | M.I. Claassen | image |
| Closterium attenuatum | C.G. Ehrenberg | image |
| Closterium attenuatum | C.G. Ehrenberg ex J. Ralfs | image |
| Closterium attenuatum f. borgei | K.H.O. Printz | image |
| Closterium attenuatum f. latius | E.K. Kossinskaja | image |
| Closterium attenuatum subsp. sculptum | C.F.O. Nordstedt | image |
| Closterium auerswaldii | G.L. Rabenhorst | image |
| Closterium auerswaldii | G.L. Rabenhorst | image |
| Closterium aureum | C.G.T. Preuss | image |
| Closterium australe | C.G. Ehrenberg | image |
| Closterium bacillum | W. Joshua | image |
| Closterium baculum | L.A. Brebisson | image |
| Closterium baculum | L.A. Brebisson | image |
| Closterium baillyanum f. asperulatum | (West & G.S. West) T.J.C. Irenee-Marie | image |
| Closterium baillyanum f. crassum_('crassa') | T.J.C. Irenee-Marie | image |
| Closterium baillyanum f. curvatum | K. Thomasson | image |
| Closterium baillyanum f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium baillyanum f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium baillyanum f. stellata | R.L. Grönblad | image |
| Closterium baillyanum f. tenue_('tenuis') | G. Nygaard | image |
| Closterium baillyanum f. tenue_('tenuis') | K. Rosa | image |
| Closterium baillyanum | L.A. Brebisson | image |
| Closterium baillyanum | L.A. Brebisson | image |
| Closterium baillyanum var. annulatum | B. Eichler & M. Raciborski | image |
| Closterium baillyanum var. multinucleatum | (C.F.O. Nordstedt) R.L. Grönblad | image |
| Closterium baillyanum var. parvulum | R.L. Grönblad | image |
| Closterium baillyanum var. tenue | (G. Nygaard) G. Nygaard | image |
| Closterium balatonicum | T. Hortobágyi | image |
| Closterium balatonicum | T. Hortobágyi | image |
| Closterium balmacarense | W. Turner | image |
| Closterium barbaricum | M.I. Claassen | image |
| Closterium biclavatum f. australiense | A.M. Scott ex H.T. Croasdale | image |
| Closterium biclavatum | F.C.E. Børgesen | image |
| Closterium bicurvatum | G.B. Delponte | image |
| Closterium bicurvatum var. majus_('major') | S.P. Petkoff | image |
| Closterium bienense | G. De Notaris | image |
| Closterium bogoriense | C. Bernard | image |
| Closterium borodinianum | Y.V. Roll | image |
| Closterium boyanum | M.I. Claassen | image |
| Closterium braunianum | P.F. Reinsch | image |
| Closterium braunii f. sculpta | (C.F.O. Nordstedt) R.L. Grönblad | image |
| Closterium braunii | P.F. Reinsch | image |
| Closterium brebissonii | G.B. Delponte | image |
| Closterium brebissonii var. substriatum | R.L. Grönblad | image |
| Closterium brebissonii_('brebissonii') | G.G.A. Meneghini | image |
| Closterium brunelii | P. Bourrelly | image |
| Closterium bucharica | I.A. Kisselev | image |
| Closterium caffrorum | M.I. Claassen | image |
| Closterium calamus | G.I. Playfair | image |
| Closterium calosporum f. dianoides | P.E.E. Kaiser | image |
| Closterium calosporum f. majus_('major') | West & G.S. West | image |
| Closterium calosporum f. minus_('minor') | G.E. Huber-Pestalozzi | image |
| Closterium calosporum f. minus_('minor') | Wille | image |
| Closterium calosporum f. typica | R. Gutwinski | image |
| Closterium calosporum | V.B. Wittrock | image |
| Closterium calosporum var. brasiliense | F.C.E. Børgesen | image |
| Closterium calosporum var. galiciense | R. Gutwinski | image |
| Closterium calosporum var. minus_('minor') | M.I. Claassen | image |
| Closterium cancer | G.I. Playfair | image |
| Closterium candianum | G.B. Delponte | image |
| Closterium capense | G.L. Rabenhorst | image |
| Closterium capillare | G.B. Delponte | image |
| Closterium capitatum | Y.V. Roll | image |
| Closterium carniolicum | J. Lütkemüller | image |
| Closterium ceratium | J.A.M. Perty | image |
| Closterium ceratium var. angustum | M.I. Claassen | image |
| Closterium cingulum | G.I. Playfair | image |
| Closterium clandestinum | F.T. Kützing | image |
| Closterium closterioides | (J. Ralfs) A. Louis & F. Peeters | image |
| Closterium closterioides | (J. Ralfs) J. Ruzicka | image |
| Closterium closterioides var. elongatum | (Willi Krieger) J. Ruzicka | image |
| Closterium closterioides var. intermedium | (J. Roy & J. Bisset) J. Ruzicka | image |
| Closterium coloratum | (G.A. Klebs) R. Gutwinski | image |
| Closterium coloratum | (G.A. Klebs) R. Gutwinski | image |
| Closterium columbianum | G.S. West | image |
| Closterium compactum | C.F.O. Nordstedt | image |
| Closterium compactum | C.F.O. Nordstedt | image |
| Closterium compactum var. minus | P. Bourrelly | image |
| Closterium complanatum | G.B. Delponte | image |
| Closterium concinnum | T. Hinode | image |
| Closterium constrictum | R. Gutwinski | image |
| Closterium cordanum | R. Gutwinski | image |
| Closterium cordanum | R. Gutwinski | image |
| Closterium cornu | C.G. Ehrenberg | image |
| Closterium cornu | C.G. Ehrenberg ex J. Ralfs | image |
| Closterium cornu f. elongata | G.L. Rabenhorst | image |
| Closterium cornu f. hyalina | A. Kurz | image |
| Closterium cornu f. majus_('major') | J.N.F. Wille | image |
| Closterium cornu f. tumida | G.L. Rabenhorst | image |
| Closterium cornu subsp. croasdalei | M.A.F. Faridi | image |
| Closterium cornu var. angustum | M.I. Claassen | image |
| Closterium cornu var. arcum | West | image |
| Closterium cornu var. brasiliense_('brasiliensis') | F.C.E. Børgesen | image |
| Closterium cornu var. javanicum | R. Gutwinski | image |
| Closterium cornu var. minus_('minor') | M.I. Claassen | image |
| Closterium cornu var. minus_('minor') | T.J.C. Irenee-Marie | image |
| Closterium cornu var. siamense | West & G.S. West | image |
| Closterium cornu var. sigmoidea | H. Bachmann | image |
| Closterium cornu var. tenuissima | P.J. Brühl & K.P. Biswas | image |
| Closterium cornu var. upsaliense | C.F.O. Nordstedt | image |
| Closterium cornutum | G.I. Playfair | image |
| Closterium costatosporum | C.E. Taft | image |
| Closterium costatum | A.K.J. Corda ex J. Ralfs | image |
| Closterium costatum f. borgeana | N.N. Woronichin | image |
| Closterium costatum f. intermedia | F. Ducellier | image |
| Closterium costatum f. klebsii | R.L. Grönblad | image |
| Closterium costatum var. borgei | (Willi Krieger) J. Ruzicka | image |
| Closterium costatum var. curtum | L.A. Brebisson | image |
| Closterium costatum var. leve_('levis') | T.J.C. Irenee-Marie | image |
| Closterium costatum var. multinucleatum | G. Deflandre | image |
| Closterium costatum var. multipyrenoidum | P. Bourrelly & A. Coute | image |
| Closterium costatum var. subtumidum | M. Raciborski | image |
| Closterium costatum var. turgidulum | (F.T. Kützing) G.L. Rabenhorst | image |
| Closterium costatum var. wagae | (R. Gutwinski) K. Rosa & J. Ruzicka | image |
| Closterium costatum var. westii | J.A. Cushman | image |
| Closterium crameri | C. Bernard | image |
| Closterium crassestriatum | W. Archer | image |
| Closterium crassum | G.B. Delponte | image |
| Closterium crassum | G.L. Rabenhorst | image |
| Closterium crassum var. longissimum | L. Viret | image |
| Closterium crenulatum | C.G. Ehrenberg | image |
| Closterium croasdaleae | A.K.M.N. Islam | image |
| Closterium cucumis | C.G. Ehrenberg | image |
| Closterium cucumis | C.G. Ehrenberg ex J. Ralfs | image |
| Closterium curtum | L.A. Brebisson | image |
| Closterium curtum | L.A. Brebisson | image |
| Closterium curtum | L.A. Brebisson ex F.T. Kützing | image |
| Closterium cuspidatum | Bailey | image |
| Closterium cylindrocystis | F.T. Kützing | image |
| Closterium cylindrus | C.G. Ehrenberg | image |
| Closterium cymbelliforme_('cymbellaeformis') | M.I. Claassen | image |
| Closterium cynthia f. lata | W. Schmidle | image |
| Closterium cynthia f. punctatum | G.W. Prescott & A.M. Scott | image |
| Closterium cynthia | G. De Notaris | image |
| Closterium cynthia var. curvatissimum | West & G.S. West | image |
| Closterium cynthia var. curvatum | V. Therezien | image |
| Closterium cynthia var. waterbergense | M.I. Claassen | image |
| Closterium cynthioides | J. Sampaio | image |
| Closterium dacchense | A.K.M.N. Islam | image |
| Closterium decorum f. gracilius_('gracilior') | W.M. Maskell | image |
| Closterium decorum f. minus_('minor') | E.E. Manguin | image |
| Closterium decorum f. minus_('minor') | West & G.S. West | image |
| Closterium decorum | L.A. Brebisson | image |
| Closterium decorum var. breve | West & G.S. West | image |
| Closterium decorum var. minus_('minor') | B.V. Skvortzov | image |
| Closterium decorum var. minus_('minor') | M.I. Claassen | image |
| Closterium decussatum | F.T. Kützing | image |
| Closterium decussatum | F.T. Kützing ex J. Ralfs | image |
| Closterium delectum | M. Noda & B.V. Skvortzov | image |
| Closterium delpontei f. angustura | M. Raciborski | image |
| Closterium delpontei f. glabrum_('glabra') | R. Gutwinski | image |
| Closterium delpontei f. sculptum_('sculpta') | R. Gutwinski | image |
| Closterium delpontei var. dilatatum | (W. Schmidle) K. Förster | image |
| Closterium delpontei var. dilatatum | (W. Schmidle) K. Förster | image |
| Closterium delpontei var. elongatum | West & G.S. West | image |
| Closterium delpontei var. minimum | C. Bernard | image |
| Closterium delpontei var. rectum | G.I. Playfair | image |
| Closterium delpontei var. truncatum | (W.B. Turner) Willi Krieger | image |
| Closterium dianae | C.G. Ehrenberg | image |
| Closterium dianae | C.G. Ehrenberg ex J. Ralfs | image |
| Closterium dianae f. brevius_('brevior') | S.P. Petkoff | image |
| Closterium dianae f. crassior | J. Roubal | image |
| Closterium dianae f. intermedium | E.K. Kossinskaja | image |
| Closterium dianae f. majus_('major') | J.N.F. Wille | image |
| Closterium dianae f. majus_('major') | S. Yacubson | image |
| Closterium dianae f. minus_('minor') | F. Hustedt | image |
| Closterium dianae f. minus_('minor') | G.E. Huber-Pestalozzi | image |
| Closterium dianae f. rectius_('rectior') | Wittrock & Nordstedt | image |
| Closterium dianae f. verrucosa | F. Nagy-Tóth | image |
| Closterium dianae subsp. brevius | (S.P. Petkoff) F.M. Sarim & M.A.F. Faridi | image |
| Closterium dianae var. arcuatum | (L.A. Brebisson) G.L. Rabenhorst | image |
| Closterium dianae var. compressum | G.A. Klebs | image |
| Closterium dianae var. crassum | T. Hinode | image |
| Closterium dianae var. excavatum | (O.F. Borge) J. Ruzicka | image |
| Closterium dianae var. incurvum | (L.A. Brebisson) G.A. Klebs | image |
| Closterium dianae var. jenneri | (J. Ralfs) G.A. Klebs | image |
| Closterium dianae var. majus_('major') | B.V. Skvortzov & M. Noda | image |
| Closterium dianae var. minus_('minor') | F. Ducellier | image |
| Closterium dianae var. minus_('minor') | G.H.E.W. Hieronymus | image |
| Closterium dianae var. pseudoleibleinii | K. Förster & F. Eckert | image |
| Closterium dianae var. typicum | G.A. Klebs | image |
| Closterium dianae var. venus | (F.T. Kützing) G.A. Klebs | image |
| Closterium didymocarpum | W. Schmidle | image |
| Closterium didymotocum | A.K.J. Corda ex J. Ralfs | image |
| Closterium didymotocum f. crassa | R.L. Grönblad | image |
| Closterium didymotocum f. maxima | R.L. Grönblad | image |
| Closterium didymotocum f. minus_('minor') | West & G.S. West | image |
| Closterium didymotocum f. perporosa | P. Schulz-Danzig | image |
| Closterium didymotocum f. striolatum | K. Förster & F. Eckert | image |
| Closterium didymotocum var. alpinum | L. Viret | image |
| Closterium didymotocum var. annulatum | M.O.P. Iyengar & B. Vimala Bai | image |
| Closterium didymotocum var. asperulatum | West & G.S. West | image |
| Closterium didymotocum var. baillyanum | J. Ralfs | image |
| Closterium didymotocum var. brebissonianum | G.L. Rabenhorst | image |
| Closterium didymotocum var. decussatum | (F.T. Kützing) G.L. Rabenhorst | image |
| Closterium didymotocum var. delpontei | R.L. Grönblad | image |
| Closterium didymotocum var. elenkinii | E.K. Kossinskaja | image |
| Closterium didymotocum var. hirudo | (G.B. Delponte) W.B. Turner | image |
| Closterium didymotocum var. johnsonii | (West & G.S. West) J.A. Cushman | image |
| Closterium didymotocum var. majus_('major') | G.H.E.W. Hieronymus | image |
| Closterium didymotocum var. multinucleatum | C.F.O. Nordstedt | image |
| Closterium didymotocum var. punctulatum | L. Viret | image |
| Closterium didymotocum var. punctulatum | T. Hinode | image |
| Closterium didymotocum var. pygmaeum | R.C. Starr | image |
| Closterium didymotocum var. striatum | C.W. Lowe | image |
| Closterium didymotocum var. striolatum | K. Förster & F. Eckert | image |
| Closterium didymotocum var. tropicum | West & G.S. West | image |
| Closterium difussum | M. Noda & B.V. Skvortzov | image |
| Closterium digitus | C.G. Ehrenberg | image |
| Closterium dilatatum | F.T. Kützing | image |
| Closterium dilatatum | West & G.S. West | image |
| Closterium dimoron | C.G. Ehrenberg | image |
| Closterium directum f. gracilius_('gracilior') | R. Gutwinski | image |
| Closterium directum var. oligocampylum | (W. Schmidle) J. Ruzicka | image |
| Closterium directum | W. Archer | image |
| Closterium discolor | M. Noda & B.V. Skvortzov | image |
| Closterium diversum | M. Noda & B.V. Skvortzov | image |
| Closterium doliolatum | L.A. Brebisson | image |
| Closterium doliolatum | L.A. Brebisson | image |
| Closterium dubium | R. Gutwinski | image |
| Closterium dubium | R. Gutwinski | image |
| Closterium eboracense var. achillense | West | image |
| Closterium ehrenbergii f. attenuatum | N.D. Kamat | image |
| Closterium ehrenbergii f. colorato-glabra | N.N. Woronichin | image |
| Closterium ehrenbergii f. curtum | S.P. Petkoff | image |
| Closterium ehrenbergii f. majus_('major') | T.J.C. Irenee-Marie | image |
| Closterium ehrenbergii f. majus_('major') | T.J.C. Irenee-Marie, illeg. | image |
| Closterium ehrenbergii f. majus_('major') | U.C. Pandey & D.C. Pandey | image |
| Closterium ehrenbergii f. percrassa | R.L. Grönblad | image |
| Closterium ehrenbergii f. rhodopea | S.P. Petkoff | image |
| Closterium ehrenbergii f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium ehrenbergii f. striatum | G.W. Prescott | image |
| Closterium ehrenbergii f. tenue_('tenuis') | G.S. Venkataraman | image |
| Closterium ehrenbergii | G.G.A. Meneghini | image |
| Closterium ehrenbergii | G.G.A. Meneghini ex J. Ralfs | image |
| Closterium ehrenbergii var. angustatum | M. Hirano | image |
| Closterium ehrenbergii var. angustum | M. Hirano | image |
| Closterium ehrenbergii var. bosniacum | R. Gutwinski | image |
| Closterium ehrenbergii var. brasiliense | C.F.O. Nordstedt | image |
| Closterium ehrenbergii var. concavum | W. Schmidle | image |
| Closterium ehrenbergii var. immane | F. Wolle | image |
| Closterium ehrenbergii var. minutissimum | M.I. Claassen | image |
| Closterium ehrenbergii var. podolicum | R. Gutwinski | image |
| Closterium ehrenbergii var. pseudopodolicum | E.O. Hughes | image |
| Closterium elegans | L.A. Brebisson | image |
| Closterium elenkinii | E.K. Kossinskaja | image |
| Closterium elongatum | L.A. Brebisson | image |
| Closterium elongatum | L.A. Brebisson | image |
| Closterium ensis | G.B. Delponte | image |
| Closterium ensis | G.W. Focke | image |
| Closterium entomon | C.G. Ehrenberg | image |
| Closterium eriense | C.E. Taft | image |
| Closterium eriense var. minus_('minor') | Y. Therezien | image |
| Closterium evesiculatum | P.W. Cook | image |
| Closterium excavatum | O.F. Borge | image |
| Closterium exiguum | West & G.S. West | image |
| Closterium exile var. unicrystallatum | E. Kol | image |
| Closterium exile | West & G.S. West | image |
| Closterium falcatum | (A.K.J. Corda) G.G.A. Meneghini | image |
| Closterium falcatum | W.M. Grant | image |
| Closterium fasciculatum | J.P. Jacobsen | image |
| Closterium flaccidum | G.B. Delponte | image |
| Closterium fractum | W.B. Turner | image |
| Closterium fuscum | B.V. Skvortzov & M. Noda | image |
| Closterium fuscum var. gracile | B.V. Skvortzov & M. Noda | image |
| Closterium fusiforme f. truncata | S.P. Petkoff | image |
| Closterium galiciense | R. Gutwinski | image |
| Closterium galiciense | R. Gutwinski | image |
| Closterium garoetianum | C. Bernard | image |
| Closterium giganteum | C. Bernard | image |
| Closterium gracile f. angulata | R.L. Grönblad | image |
| Closterium gracile f. colorato-glabra | N.N. Woronichin | image |
| Closterium gracile f. colorato-glabra | N.N. Woronichin | image |
| Closterium gracile f. elongatum | (West & G.S. West) E.K. Kossinskaja | image |
| Closterium gracile f. gracillima | West | image |
| Closterium gracile f. longissima | G. Nygaard | image |
| Closterium gracile f. sigmoideum | H.T. Croasdale | image |
| Closterium gracile f. sygmoideum | T.J.C. Irenee-Marie | image |
| Closterium gracile f. tenue | (E.J. Lemmermann) E.K. Kossinskaja | image |
| Closterium gracile | L.A. Brebisson | image |
| Closterium gracile | L.A. Brebisson | image |
| Closterium gracile | L.A. Brebisson ex J. Ralfs | image |
| Closterium gracile var. bicurvatum | (G.B. Delponte) G.I. Playfair | image |
| Closterium gracile var. brevius | M.I. Claassen | image |
| Closterium gracile var. coloratum | F. Hustedt | image |
| Closterium gracile var. elongatum | West & G.S. West | image |
| Closterium gracile var. intermedium | T.J.C. Irenee-Marie | image |
| Closterium gracile var. lundellii | (N.G. Lagerheim) E.K. Kossinskaja | image |
| Closterium gracile var. substrigosum | (M. Raciborski) G.I. Playfair | image |
| Closterium gracile var. tenue | (E.J. Lemmermann) West & G.S. West | image |
| Closterium gracile var. tenue | (E.J. Lemmermann) West & G.S. West | image |
| Closterium granulatum | L.A. Brebisson | image |
| Closterium granulatum | L.A. Brebisson | image |
| Closterium gregarium | G.G.A. Meneghini | image |
| Closterium griffithii | M.J. Berkeley | image |
| Closterium guyanense | (P. Bourrelly & A. Coute) P.F.M. Coesel | image |
| Closterium hantzschianum | A. Grunow | image |
| Closterium heimerlianum | (W. Schmidle) J. Lütkemüller | image |
| Closterium hinganicum | M. Noda & B.V. Skvortzov | image |
| Closterium hinganicum var. rivulare_('rivularis') | M. Noda & B.V. Skvortzov | image |
| Closterium hirudo | G.B. Delponte | image |
| Closterium hunanense | C.C. Jao | image |
| Closterium hutchinsonii | M.F. Rich | image |
| Closterium idiosporum var. echinosporum | P. Bourrelly | image |
| Closterium idiosporum | West & G.S. West | image |
| Closterium inaequale | C.G. Ehrenberg | image |
| Closterium inaequale | C.G. Ehrenberg ex J. Ralfs | image |
| Closterium incrassatum | R. Gutwinski | image |
| Closterium incrassatum | R. Gutwinski | image |
| Closterium incurvum f. latior | T.J.C. Irenee-Marie | image |
| Closterium incurvum f. majus_('major') | S.P. Petkoff | image |
| Closterium incurvum | L.A. Brebisson | image |
| Closterium incurvum var. elaboratum | M.I. Claassen | image |
| Closterium incurvum var. majus | V.B. Wittrock | image |
| Closterium infractum | E. Messikommer | image |
| Closterium infractum var. rotundatum | R.L. Grönblad | image |
| Closterium infractum var. sanctipaulense | C.E.M. Bicudo | image |
| Closterium insolitum | M.I. Claassen | image |
| Closterium intermedium f. eboracense | W. Turner | image |
| Closterium intermedium f. minus_('minor') | L. Viret | image |
| Closterium intermedium | J. Ralfs | image |
| Closterium intermedium var. alpinum | L. Viret | image |
| Closterium intermedium var. delicatulum | T. Hinode | image |
| Closterium intermedium var. directum | (W. Archer) G.A. Klebs | image |
| Closterium intermedium var. erectum | R.L. Grönblad | image |
| Closterium intermedium var. hibernicum | West & G.S. West | image |
| Closterium intermedium var. juncidum | (J. Ralfs) G.A. Klebs | image |
| Closterium intermedium var. latum | F. Hustedt | image |
| Closterium intermedium var. mesianum | M.I. Claassen | image |
| Closterium intermedium var. nilssonii | (O.F. Borge) J. Ruzicka | image |
| Closterium intermedium var. ornatum | B.V. Skvortzov | image |
| Closterium intermedium var. rectostriatum | M. Raciborski | image |
| Closterium intermedium var. regulare | (L.A. Brebisson) G.L. Rabenhorst | image |
| Closterium intermedium var. sculptum | M. Raciborski | image |
| Closterium intermedium var. spirostriolatum | M. Raciborski | image |
| Closterium intermedium var. typicum | G.A. Klebs | image |
| Closterium interruptum | (L.A. Brebisson) P.F. Reinsch | image |
| Closterium intervalicola | J.A. Cushman | image |
| Closterium isidis | F.J. Cohn | image |
| Closterium japonicum | W.F.R. Suringar | image |
| Closterium jenneri f. exiguum | G. Beck | image |
| Closterium jenneri f. longior | S.P. Petkoff | image |
| Closterium jenneri f. majus_('major') | G.R. Cedergren | image |
| Closterium jenneri f. minus-curvata_('minus curvata') | P.S. Petkoff | image |
| Closterium jenneri f. minus_('minor') | B.V. Skvortzov | image |
| Closterium jenneri f. opulentum | G. Beck | image |
| Closterium jenneri | J. Ralfs | image |
| Closterium jenneri var. dubitabile_('dubitabilis') | M.I. Claassen | image |
| Closterium jenneri var. hibernicum | West | image |
| Closterium jenneri var. majus_('major') | F. Ducellier | image |
| Closterium jenneri var. myrdalense | K.M. Strøm | image |
| Closterium jenneri var. percurvatum | H.T. Croasdale | image |
| Closterium jenneri var. tenue | H.T. Croasdale | image |
| Closterium juncidum f. austriacum_('austriaca') | A. Heimerl | image |
| Closterium juncidum f. brevius_('brevior') | J. Roy | image |
| Closterium juncidum f. elongatissimum | D.A. Tarnogradskii | image |
| Closterium juncidum f. recta | R. Gutwinski | image |
| Closterium juncidum f. recta | T.J.C. Irenee-Marie | image |
| Closterium juncidum f. truncata | G. Nygaard | image |
| Closterium juncidum | J. Ralfs | image |
| Closterium juncidum subsp. elongatum | (J. Roy & J. Bisset) F.M. Sarim & M.A.F. Faridi | image |
| Closterium juncidum var. dilatatum | Y. Therezien | image |
| Closterium juncidum var. elongatum | J. Roy & J. Bisset | image |
| Closterium juncidum var. gracile | (L.A. Brebisson) J.E. Weiss | image |
| Closterium khasianum | W.B. Turner | image |
| Closterium knysnanum | G.E. Huber-Pestalozzi | image |
| Closterium koernickei | C. Bernard | image |
| Closterium kolhapurense | N.D. Kamat | image |
| Closterium kolhapurense var. minus | N.D. Kamat | image |
| Closterium kranskopense | M.I. Claassen | image |
| Closterium kuetzingii f. brevior | Dick | image |
| Closterium kuetzingii f. elongata | G.R. Cedergren | image |
| Closterium kuetzingii f. minus | P. Compère | image |
| Closterium kuetzingii f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium kuetzingii | L.A. Brebisson | image |
| Closterium kuetzingii var. capense | C.F.O. Nordstedt | image |
| Closterium kuetzingii var. constrictum | B.V. Skvortzov & M. Noda | image |
| Closterium kuetzingii var. croasdaleae | (K. Förster) K. Förster | image |
| Closterium kuetzingii var. glacile | T. Hinode | image |
| Closterium kuetzingii var. minus | T. Hinode | image |
| Closterium kuetzingii var. onychosporum | West & G.S. West | image |
| Closterium kuetzingii var. procerum | H.L. Skuja | image |
| Closterium kuetzingii var. pseudopronum | R.L. Grönblad | image |
| Closterium kuetzingii var. transvaalense | M.I. Claassen | image |
| Closterium kuetzingii var. vittatum | C.F.O. Nordstedt | image |
| Closterium kuetzingii var. vittatum | C.F.O. Nordstedt | image |
| Closterium laeve | F.T. Kützing | image |
| Closterium lagoense | C.F.O. Nordstedt | image |
| Closterium lagoense var. brevius | M. Hirano | image |
| Closterium lagoense var. crassius | R. Gutwinski | image |
| Closterium lagoense var. laeve | West & G.S. West | image |
| Closterium lamellosum | L.A. Brebisson | image |
| Closterium lanceolatum f. angusta | T. Hortobágyi | image |
| Closterium lanceolatum f. minus_('minor') | K. Vedajanani & Y.S.R.K. Sarma | image |
| Closterium lanceolatum f. parvum | (West & G.S. West) E.K. Kossinskaja | image |
| Closterium lanceolatum f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium lanceolatum | F.T. Kützing | image |
| Closterium lanceolatum | F.T. Kützing ex J. Ralfs | image |
| Closterium lanceolatum var. bernardi | Willi Krieger | image |
| Closterium lanceolatum var. coloratum | (G.A. Klebs) G.I. Playfair | image |
| Closterium lanceolatum var. majus | L.A. Brebisson | image |
| Closterium lanceolatum var. parvum | West & G.S. West | image |
| Closterium laterale | C.F.O. Nordstedt | image |
| Closterium laterale var. simplicius | E.O. Hughes | image |
| Closterium latiusculum | J.A.M. Perty | image |
| Closterium legumen var. brasiliense | O.F. Borge | image |
| Closterium legumen | West & G.S. West | image |
| Closterium leibleini | F.T. Kützing | image |
| Closterium leibleinii f. boergesenii | W. Schmidle | image |
| Closterium leibleinii f. boergesenii | W. Schmidle | image |
| Closterium leibleinii f. crassior | O.F. Borge | image |
| Closterium leibleinii f. elatior | M. Lewin | image |
| Closterium leibleinii f. majus_('major') | F.E. Fritsch & M.F. Rich | image |
| Closterium leibleinii f. minus_('minor') | F.E. Fritsch & M.F. Rich | image |
| Closterium leibleinii f. minus_('minor') | W.B. Turner | image |
| Closterium leibleinii f. nasutum | L.S. Peterfi | image |
| Closterium leibleinii f. parva | W.B. Turner | image |
| Closterium leibleinii f. sigmoidea | G. Deflandre | image |
| Closterium leibleinii f. willei | R. Gutwinski | image |
| Closterium leibleinii | F.T. Kützing ex J. Ralfs | image |
| Closterium leibleinii | Kützing | image |
| Closterium leibleinii var. angulatum | F. Balsamo | image |
| Closterium leibleinii var. curtum | West | image |
| Closterium leibleinii var. granulata | H. Kufferath | image |
| Closterium leibleinii var. manschuricum | B.V. Skvortzov | image |
| Closterium leibleinii var. minima | W. Schmidle | image |
| Closterium leibleinii var. montanum | L. Viret | image |
| Closterium leibleinii var. occidentale | West | image |
| Closterium leibleinii var. philippinense | M. Hirano | image |
| Closterium leibleinii var. recurvatum | West & G.S. West | image |
| Closterium lemmermannii_('lemmermanni') | O. Zacharias | image |
| Closterium lens | J.P. Jacobsen | image |
| Closterium lens var. intermedia | J.P. Jacobsen | image |
| Closterium lens var. majus_('major') | J.P. Jacobsen | image |
| Closterium lens var. minus_('minor') | J.P. Jacobsen | image |
| Closterium libellula f. elongatum_('elongata') | Willi Krieger | image |
| Closterium libellula f. intermedium | (J. Roy & J. Bisset) E.K. Kossinskaja | image |
| Closterium libellula f. majus | (O.F. Borge) E.K. Kossinskaja | image |
| Closterium libellula f. sygmoideum | T.J.C. Irenee-Marie | image |
| Closterium libellula | G.W. Focke | image |
| Closterium libellula subsp. interruptum | (West) F.M. Sarim & M.A.F. Faridi | image |
| Closterium libellula var. angusticeps | R.L. Grönblad | image |
| Closterium libellula var. elongatum | (Willi Krieger) A.M. Scott & G.W. Prescott | image |
| Closterium libellula var. gracile_('gracilis') | H. Kufferath | image |
| Closterium libellula var. intermedium | (J. Roy & J. Bisset) G.S. West | image |
| Closterium libellula var. interruptum | A. Donat | image |
| Closterium libellula var. pulneyense_('pulneyensis') | M.O.P. Iyengar & B. Vimala Bai | image |
| Closterium limicum | J. Sampaio | image |
| Closterium limneticum | E.J. Lemmermann | image |
| Closterium limneticum f. elongatum | P. Compère | image |
| Closterium limneticum var. fallax | J. Ruzicka | image |
| Closterium limneticum var. tenue | E.J. Lemmermann | image |
| Closterium linea | J.A.M. Perty | image |
| Closterium lineare | C.W. Nägeli | image |
| Closterium lineatum | C.G. Ehrenberg | image |
| Closterium lineatum | C.G. Ehrenberg ex J. Ralfs | image |
| Closterium lineatum f. angustatum | P.F. Reinsch | image |
| Closterium lineatum f. angustum | P.F. Reinsch | image |
| Closterium lineatum f. elongatum | K. Rosa | image |
| Closterium lineatum f. incolorato-glabra | N.N. Woronichin | image |
| Closterium lineatum f. laeve | T.J.C. Irenee-Marie | image |
| Closterium lineatum f. latior | K. Rosa | image |
| Closterium lineatum f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium lineatum f. spirostriolata | West & G.S. West | image |
| Closterium lineatum f. sublaeve_('sublaevis') | G.L. Rabenhorst | image |
| Closterium lineatum f. tenuissimum | P.F. Reinsch | image |
| Closterium lineatum var. costatum | F. Wolle | image |
| Closterium lineatum var. costatum | W.N. Hastings | image |
| Closterium lineatum var. gracile | K. Behre | image |
| Closterium lineatum var. guyanense | P. Bourrelly & A. Coute | image |
| Closterium lineatum var. majus_('major') | G.E. Huber-Pestalozzi | image |
| Closterium lineatum var. maximum | B.H. Smith | image |
| Closterium lineatum var. minus | N.N. Woronichin | image |
| Closterium lineatum var. monolithum | A. Kurz | image |
| Closterium lineatum var. multinucleatum | G. Deflandre | image |
| Closterium lineatum var. perporosum | R.L. Grönblad | image |
| Closterium lineatum var. sandvicense | C.F.O. Nordstedt | image |
| Closterium lineatum var. sublaeve | L.A. Brebisson | image |
| Closterium lineatum var. subrectum | M. Noda & B.V. Skvortzov | image |
| Closterium lineola | K.E. Eichwald | image |
| Closterium lineolatum | C.G. Ehrenberg | image |
| Closterium lineolatum | F.T. Kützing | image |
| Closterium littorale f. crassior | O.F. Borge | image |
| Closterium littorale f. minus | L.E. Komarenko | image |
| Closterium littorale var. brunnea | B.V. Skvortzov & M. Noda | image |
| Closterium littorale var. elegans | (G.S. West) J. Ruzicka | image |
| Closterium loefgrenii | O.F. Borge | image |
| Closterium loktakense | P.J. Brühl & K.P. Biswas | image |
| Closterium lorentzi | C. Bernard | image |
| Closterium luchterianum | P. Palik | image |
| Closterium lundellii | N.G. Lagerheim | image |
| Closterium lunula | (O.F. Müller) C.L. Nitzsch | image |
| Closterium lunula | C.G. Ehrenberg & F.G. Hemprich ex J. Ralfs | image |
| Closterium lunula f. biconvexum | (W. Schmidle) E.K. Kossinskaja | image |
| Closterium lunula f. coloratum | (G.A. Klebs) E.K. Kossinskaja | image |
| Closterium lunula f. crassissimum | H.T. Croasdale | image |
| Closterium lunula f. farcinale_('farcinalis') | W. Schmidle | image |
| Closterium lunula f. gracile_('gracilis') | E. Messikommer | image |
| Closterium lunula f. levanderi | R.L. Grönblad | image |
| Closterium lunula f. minus_('minor') | O.F. Borge | image |
| Closterium lunula f. minus_('minor') | West & G.S. West | image |
| Closterium lunula f. nasutum | A.M. Scott & G.W. Prescott | image |
| Closterium lunula f. retusum | L.S. Peterfi | image |
| Closterium lunula f. straminellum | G. Uherkovich | image |
| Closterium lunula f. striata | P. Bourrelly | image |
| Closterium lunula var. biconvexum | W. Schmidle | image |
| Closterium lunula var. carinthiacum | G. Beck | image |
| Closterium lunula var. coloratum | G.A. Klebs | image |
| Closterium lunula var. crameri | (C. Bernard) P.H.G. Oye | image |
| Closterium lunula var. cuneatum | R. Gutwinski | image |
| Closterium lunula var. giganteum | (C. Bernard) G.I. Playfair | image |
| Closterium lunula var. intermedium | R. Gutwinski | image |
| Closterium lunula var. intermedium | R. Gutwinski | image |
| Closterium lunula var. maximum | O.F. Borge | image |
| Closterium lunula var. praegrande | (G.L. Rabenhorst) P.C.M. Petit | image |
| Closterium lunula var. pseudoacerosum | G.W. Prescott | image |
| Closterium lunula var. rectum | M. Noda & B.V. Skvortzov | image |
| Closterium lunula var. striatum | F. Wolle | image |
| Closterium lunula var. sublanceolatum | G.A. Klebs | image |
| Closterium lunula var. submoniliferum | G.A. Klebs | image |
| Closterium lunula var. typicum | G.A. Klebs | image |
| Closterium lunula var. uniseriatum | (G.A. Klebs) E.C. Teodoresco | image |
| Closterium lusitanicum | G.A.S.F. Sampaio | image |
| Closterium lusitanicum var. minus_('minor') | J. Sampaio | image |
| Closterium macedonicum | S.P. Petkoff | image |
| Closterium macilentum f. adultior | A. Kurz | image |
| Closterium macilentum f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium macilentum | L.A. Brebisson | image |
| Closterium macilentum var. elongatum | E.N. Lacoste de Díaz | image |
| Closterium macilentum var. gracile | P. Bourrelly | image |
| Closterium macilentum var. inflatulum | K. Förster | image |
| Closterium macilentum var. kavinae | K. Rosa | image |
| Closterium macilentum var. minus_('minor') | S.P. Petkoff | image |
| Closterium macilentum var. simplissimum | G.W. Prescott | image |
| Closterium macilentum var. substrigosum | M. Raciborski | image |
| Closterium maculatum | W.N. Hastings | image |
| Closterium magellanicum | O.F. Borge | image |
| Closterium magnificum | G.I. Playfair | image |
| Closterium maharastrense | N.D. Kamat | image |
| Closterium malinvernianiforme | R.L. Grönblad | image |
| Closterium malinvernianiforme var. gracilius | E.O. Hughes | image |
| Closterium malinvernianiforme var. nasutum | P. Bourrelly | image |
| Closterium malinvernianum f. inflata | J.-J.-M. Virieux | image |
| Closterium malinvernianum f. majus_('major') | F.E. Fritsch | image |
| Closterium malinvernianum f. sygmoideum | T.J.C. Irenee-Marie | image |
| Closterium malinvernianum f. typica | J.-J.-M. Virieux | image |
| Closterium malinvernicum | G. De Notaris | image |
| Closterium malmei f. minus_('minor') | Therezien | image |
| Closterium malmei | O.F. Borge | image |
| Closterium malmei var. semicirculare | O.F. Borge | image |
| Closterium manipurense | P.J. Brühl & K.P. Biswas | image |
| Closterium manschuricum | B.V. Skvortzov | image |
| Closterium margaritaceum | C.G. Ehrenberg | image |
| Closterium margaritiferum | K.E. Eichwald | image |
| Closterium massartii_('massarti') | De Wildeman | image |
| Closterium maximum | (H.C. Wood) W. Schmidle | image |
| Closterium maximum | E.A.J. De Wildeman | image |
| Closterium maximum | E.A.J. De Wildeman | image |
| Closterium medioleve | W. Archer | image |
| Closterium methueni | F.E. Fritsch | image |
| Closterium methuenii var. ventricosa | F.E. Fritsch | image |
| Closterium microgranulatum | H. Kufferath | image |
| Closterium milliani | M. Lefèvre | image |
| Closterium minianum | G.A.S.F. Sampaio | image |
| Closterium minutum f. tenuior | G.E. Huber-Pestalozzi | image |
| Closterium minutum | Y.V. Roll | image |
| Closterium molle | G.I. Playfair | image |
| Closterium monile | L.A. Brebisson | image |
| Closterium monile | L.A. Brebisson | image |
| Closterium monile | L.A. Brebisson ex F.T. Kützing | image |
| Closterium moniliferum | (Bory) Ehrenberg | image |
| Closterium moniliferum | C.G. Ehrenberg ex J. Ralfs | image |
| Closterium moniliferum f. angulatum | P.F. Reinsch | image |
| Closterium moniliferum f. boryanum | P.F. Reinsch | image |
| Closterium moniliferum f. ehrenbergianum | P.F. Reinsch | image |
| Closterium moniliferum f. giganteum | K. Förster | image |
| Closterium moniliferum f. gracile | K. Förster | image |
| Closterium moniliferum f. intermedia | R. Gutwinski | image |
| Closterium moniliferum f. kuetzingiana | J.P. Jacobsen | image |
| Closterium moniliferum f. leibleiniana | J.P. Jacobsen | image |
| Closterium moniliferum f. leibleinii | (F.T. Kützing) P.F. Reinsch | image |
| Closterium moniliferum f. minus_('minor') | K.M. Strøm | image |
| Closterium moniliferum f. minus_('minor') | T. Hortobágyi | image |
| Closterium moniliferum f. muelleriana | J.P. Jacobsen | image |
| Closterium moniliferum var. acutum | Willi Krieger & A.M. Scott | image |
| Closterium moniliferum var. angulatum | (P.F. Reinsch) G.L. Rabenhorst | image |
| Closterium moniliferum var. angustatum | (C.A. Hantzsch) G.L. Rabenhorst | image |
| Closterium moniliferum var. concavum | G.A. Klebs | image |
| Closterium moniliferum var. ehrenbergii | (G.G.A. Meneghini) G.A. Klebs | image |
| Closterium moniliferum var. elegans | M. Hirano | image |
| Closterium moniliferum var. epithemioides | M.I. Claassen | image |
| Closterium moniliferum var. galiciense | (R. Gutwinski) G.S. West | image |
| Closterium moniliferum var. genuinum | E.O.O. Kirchner | image |
| Closterium moniliferum var. leibleiniaceum | G. De Notaris & F. Baglietto | image |
| Closterium moniliferum var. leibleinii | (F.T. Kützing) G.A. Klebs | image |
| Closterium moniliferum var. malinvernianiforme | (R.L. Grönblad) E.K. Kossinskaja | image |
| Closterium moniliferum var. minus | H. Alten | image |
| Closterium moniliferum var. minus_('minor') | Kützing | image |
| Closterium moniliferum var. nanum | R.L. Grönblad | image |
| Closterium moniliferum var. nasutum | M.F. Rich | image |
| Closterium moniliferum var. recurvatum | O.F. Borge | image |
| Closterium moniliferum var. robustum | T. Hinode | image |
| Closterium moniliferum var. thuretii_('Thureti') | L.A. Brebisson | image |
| Closterium moniliferum var. typicum | G.A. Klebs | image |
| Closterium monotaenium | W. Archer | image |
| Closterium mourense | G.I. Playfair | image |
| Closterium multistriatum | F.G. Hemprich & C.G. Ehrenberg | image |
| Closterium nasutum | F. Wolle | image |
| Closterium navicula | (L.A. Brebisson) J. Lütkemüller | image |
| Closterium navicula f. duplo-maior | J. Roubal | image |
| Closterium navicula f. majus_('major') | F.E. Fritsch & M.F. Rich | image |
| Closterium navicula f. pyrenoidosum | L.S. Peterfi | image |
| Closterium navicula var. tumidum | Willi Krieger & P. Bourrelly | image |
| Closterium naviculoides | J.N.F. Wille | image |
| Closterium naviculoideum | G.I. Playfair | image |
| Closterium nematodes f. majus_('major') | T.J.C. Irenee-Marie | image |
| Closterium nematodes f. minus_('minor') | F.E. Fritsch & M.F. Rich | image |
| Closterium nematodes var. microteres | H.L. Skuja | image |
| Closterium nematodes var. proboscideum | W.B. Turner | image |
| Closterium nematodes var. robustum | M. Hirano | image |
| Closterium nematodes var. sinense | C.C. Jao | image |
| Closterium nematodes var. tumidum | G.S. West | image |
| Closterium nematodes | W. Joshua | image |
| Closterium nilssonii | O.F. Borge | image |
| Closterium nodosum | Bailey | image |
| Closterium nordstedtii | R. Gutwinski | image |
| Closterium nordstedtii | R.H. Chodat | image |
| Closterium nordstedtii var. polystictum | (G. Nygaard) J. Ruzicka | image |
| Closterium novae-guineae | C. Bernard | image |
| Closterium obtusangulum | A.K.J. Corda | image |
| Closterium obtusum | Brebisson | image |
| Closterium obtusum var. majus_('major') | M. Raciborski | image |
| Closterium obtusum var. minor | M. Raciborski | image |
| Closterium obtusum var. pusillum | (C.A. Hantzsch) G.A. Klebs | image |
| Closterium obtusum var. rectissimum | C. Bernard | image |
| Closterium obtusum var. typicum | G.A. Klebs | image |
| Closterium obversum | K.E. Eichwald | image |
| Closterium oligocampylum f. tenuior | J. Roubal | image |
| Closterium oligocampylum | W. Schmidle | image |
| Closterium oncosporum | C.F.O. Nordstedt | image |
| Closterium ornatum | G.L. Rabenhorst | image |
| Closterium pachydermum | West & G.S. West | image |
| Closterium paradoxum | J.N.F. Wille | image |
| Closterium parasiticum | G.G.A. Meneghini | image |
| Closterium parvulum | C.W. Nägeli | image |
| Closterium parvulum f. majus_('major') | F. Auclair | image |
| Closterium parvulum f. majus_('major') | K.M. Strøm | image |
| Closterium parvulum f. majus_('major') | Y.V. Roll | image |
| Closterium parvulum f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium parvulum var. angustissimum | T. Hinode | image |
| Closterium parvulum var. angustum | West & G.S. West | image |
| Closterium parvulum var. angustum | West & G.S. West | image |
| Closterium parvulum var. crassius | C. Bernard | image |
| Closterium parvulum var. flaccidum | (G.B. Delponte) E.K. Kossinskaja | image |
| Closterium parvulum var. minus_('minor') | M.I. Claassen | image |
| Closterium parvulum var. obtusum | H.T. Croasdale | image |
| Closterium parvulum var. robustum | E. Messikommer | image |
| Closterium parvulum var. tortum | (B.M. Griffiths) H.L. Skuja | image |
| Closterium parvulum var. tumidum | G. Nygaard | image |
| Closterium pegleri | F.E. Fritsch | image |
| Closterium penium | P.F. Reinsch | image |
| Closterium peracerosum f. curvata | F.E. Fritsch | image |
| Closterium peracerosum f. incolorato-glabra | N.N. Woronichin | image |
| Closterium peracerosum var. aethiopicum | West & G.S. West | image |
| Closterium perminutum | O.F. Borge | image |
| Closterium planum | E.O. Hughes | image |
| Closterium pleurodermatum | West & G.S. West | image |
| Closterium polymorphum | J.A.M. Perty | image |
| Closterium polystictum | G. Nygaard | image |
| Closterium polystictum var. brevius | K. Behre | image |
| Closterium polystictum var. breviusculum | G. Nygaard | image |
| Closterium polystictum var. patagonicum | R.M. Whelden | image |
| Closterium porrectum | C.F.O. Nordstedt | image |
| Closterium porrectum var. angustatum | West & G.S. West | image |
| Closterium porrectum var. borgei | K. Förster | image |
| Closterium praegrande | G.L. Rabenhorst | image |
| Closterium praelongum f. brevius_('brevior') | C.F.O. Nordstedt | image |
| Closterium praelongum f. colorato-glabra | N.N. Woronichin | image |
| Closterium praelongum f. colorato-punctata | N.N. Woronichin | image |
| Closterium praelongum f. colorato-striata | N.N. Woronichin | image |
| Closterium praelongum f. incolorato-glabra | N.N. Woronichin | image |
| Closterium praelongum | L.A. Brebisson | image |
| Closterium praelongum subsp. brevius | (C.F.O. Nordstedt) F.M. Sarim & M.A.F. Faridi | image |
| Closterium praelongum var. crassior | W. Schmidle | image |
| Closterium praelongum var. punctatum | K. Rosa | image |
| Closterium praelongum var. rectum | E.J. Lemmermann | image |
| Closterium praelongum var. strigosum | (L.A. Brebisson) G.I. Playfair | image |
| Closterium pritchardianum f. attenuata | T.J.C. Irenee-Marie | image |
| Closterium pritchardianum f. brasiliense | K. Förster & F. Eckert | image |
| Closterium pritchardianum f. crassa | R. Gutwinski | image |
| Closterium pritchardianum f. crassa | R. Gutwinski | image |
| Closterium pritchardianum f. laeve | E.O. Hughes | image |
| Closterium pritchardianum f. maxima | C.F.O. Nordstedt | image |
| Closterium pritchardianum f. maximum | G. Uherkovich | image |
| Closterium pritchardianum f. micro-punctata | E. Messikommer | image |
| Closterium pritchardianum f. minus_('minor') | F.E. Fritsch | image |
| Closterium pritchardianum var. alpinum | W. Schmidle | image |
| Closterium pritchardianum var. angustatum | K. Rosa | image |
| Closterium pritchardianum var. angustum | K.M. Borzecki | image |
| Closterium pritchardianum var. madagascariense | F.E. Fritsch | image |
| Closterium pritchardianum var. minus | West | image |
| Closterium pritchardianum var. olygo-punctatum | Y.V. Roll | image |
| Closterium pritchardianum var. subpraelongum | R.L. Grönblad | image |
| Closterium pritchardianum | W. Archer | image |
| Closterium proboscideum | W.B. Turner | image |
| Closterium prolongum | M.F. Rich | image |
| Closterium pronum f. brebissonii | P.F. Reinsch | image |
| Closterium pronum f. brevius | (W. West) E.K. Kossinskaja | image |
| Closterium pronum f. brevius | West | image |
| Closterium pronum f. hylina | M. Raciborski | image |
| Closterium pronum f. plurilocellata | N.N. Woronichin | image |
| Closterium pronum f. pritshardianum | (W. Archer) P.F. Reinsch | image |
| Closterium pronum f. sigmoideum | Woronichin | image |
| Closterium pronum f. tenerrimum | P.F. Reinsch | image |
| Closterium pronum | L.A. Brebisson | image |
| Closterium pronum var. acutum | (H.C. Lyngbye) G.A. Klebs | image |
| Closterium pronum var. cornu | (C.G. Ehrenberg) G.A. Klebs | image |
| Closterium pronum var. fresenii | G.L. Rabenhorst | image |
| Closterium pronum var. linea | (J.A.M. Perty) G.A. Klebs | image |
| Closterium pronum var. longissima | E.J. Lemmermann | image |
| Closterium pronum var. raphidioideum | N.M. Gaidukov | image |
| Closterium pronum var. typicum | G.A. Klebs | image |
| Closterium pseudanastomosum | R.L. Grönblad | image |
| Closterium pseudoclosterium | J. Roy | image |
| Closterium pseudoleibleinii | M.I. Claassen | image |
| Closterium pseudolibellula f. fusiforme_('fusiformis') | F.E. Fritsch | image |
| Closterium pseudolibellula | F.E. Fritsch | image |
| Closterium pseudolunula | M.I. Claassen | image |
| Closterium pseudolunula | O.F. Borge | image |
| Closterium pseudolunula var. concavum | K. Förster & F. Eckert | image |
| Closterium pseudolunula var. majus_('major') | T.J.C. Irenee-Marie | image |
| Closterium pseudonasutum | C.C. Jao | image |
| Closterium pseudopenium | R.L. Grönblad | image |
| Closterium pseudopusillum | E. Messikommer | image |
| Closterium pseudospirotaenium | E.J. Lemmermann | image |
| Closterium pseudospirotaenium var. fasciculatum | E.J. Lemmermann | image |
| Closterium pseudospirotaenium var. variabile | E.J. Lemmermann | image |
| Closterium pseudoturgidum | R. Gutwinski | image |
| Closterium pseudoturgidum | R. Gutwinski | image |
| Closterium pulchellum var. burmense | West & G.S. West | image |
| Closterium pulchellum | West & G.S. West | image |
| Closterium punctatum | H.L. Skuja | image |
| Closterium punctatum | R. Gistl | image |
| Closterium pusillum | C.A. Hantzsch | image |
| Closterium pusillum | C.A. Hantzsch | image |
| Closterium pusillum f. terrestre | H.L. Skuja | image |
| Closterium pusillum var. applanatum | Willi Krieger & P. Bourrelly | image |
| Closterium pusillum var. laticeps | R.L. Grönblad | image |
| Closterium pusillum var. majus_('major') | J. Roy & J. Bisset | image |
| Closterium pusillum var. majus_('major') | M. Raciborski | image |
| Closterium pusillum var. minus_('minor') | M. Raciborski | image |
| Closterium pusillum var. minus_('minor') | V. Allorge & P. Allorge | image |
| Closterium pusillum var. monolithum | V.B. Wittrock | image |
| Closterium pusillum var. subrectum | West & G.S. West | image |
| Closterium pygmaeum | R. Gutwinski | image |
| Closterium quadrangulare | A.K.J. Corda | image |
| Closterium ralfsii f. bohemicum | K. Rosa | image |
| Closterium ralfsii f. costatum | Lacoste de Díaz | image |
| Closterium ralfsii f. laeve | T.J.C. Irenee-Marie | image |
| Closterium ralfsii f. majus_('major') | West & G.S. West | image |
| Closterium ralfsii f. procera | T.J.C. Irenee-Marie | image |
| Closterium ralfsii f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium ralfsii f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium ralfsii | L.A. Brebisson | image |
| Closterium ralfsii | L.A. Brebisson ex J. Ralfs | image |
| Closterium ralfsii var. delpontei_('delpontii') | G.A. Klebs | image |
| Closterium ralfsii var. glentigianum | M.I. Claassen | image |
| Closterium ralfsii var. hybridum | G.L. Rabenhorst | image |
| Closterium ralfsii var. immane | J.A. Cushman | image |
| Closterium ralfsii var. kriegeri | E.O. Hughes | image |
| Closterium ralfsii var. majus_('major') | F.J. Cohn | image |
| Closterium ralfsii var. minus_('minor') | M.I. Claassen | image |
| Closterium ralfsii var. nodosum | M.I. Claassen | image |
| Closterium ralfsii var. pterosporum | P. Bourrelly | image |
| Closterium ralfsii var. subpunctatum | H.T. Croasdale | image |
| Closterium ralfsii var. subralfsii | M.I. Claassen | image |
| Closterium ralfsii var. typicum | G.A. Klebs | image |
| Closterium rectimarginatum | A.M. Scott & G.W. Prescott | image |
| Closterium rectimarginatum var. maius | N.D. Kamat | image |
| Closterium rectum | R. Gutwinski | image |
| Closterium rectum | R. Gutwinski | image |
| Closterium recurvatum | Y.V. Roll | image |
| Closterium recurvum | G.W. Prescott | image |
| Closterium refractum | G.B. Delponte | image |
| Closterium regulare | L.A. Brebisson | image |
| Closterium regulare var. dilatatum | W. Schmidle | image |
| Closterium retusum | G.G.A. Meneghini | image |
| Closterium robustum | W.N. Hastings | image |
| Closterium rostratum | C.G. Ehrenberg | image |
| Closterium rostratum | C.G. Ehrenberg ex J. Ralfs | image |
| Closterium rostratum f. angustior | R. Gutwinski | image |
| Closterium rostratum f. angustior | R. Gutwinski | image |
| Closterium rostratum f. brevirostratum | (West) E.K. Kossinskaja | image |
| Closterium rostratum f. incolorato-glabra | N.N. Woronichin | image |
| Closterium rostratum f. longior | S.P. Petkoff | image |
| Closterium rostratum f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium rostratum var. angustatum | Y.V. Roll | image |
| Closterium rostratum var. brevirostratum | West | image |
| Closterium rostratum var. kuetzingii | (L.A. Brebisson) G.A. Klebs | image |
| Closterium rostratum var. laeve | P. Capdevielle | image |
| Closterium rostratum var. laevigatum | L.A. Brebisson | image |
| Closterium rostratum var. mammosisporum | K. Förster | image |
| Closterium rostratum var. minus_('minor') | Y.V. Roll | image |
| Closterium rostratum var. setaceum | (C.G. Ehrenberg) G.A. Klebs | image |
| Closterium rostratum var. typicum | G.A. Klebs | image |
| Closterium ruficeps | C.G. Ehrenberg | image |
| Closterium rugosum | N. Woodhead & R.D. Tweed | image |
| Closterium s-romanum | G.E. Huber-Pestalozzi | image |
| Closterium sceptrum | F.T. Kützing | image |
| Closterium schroederi | J. Woloszynska | image |
| Closterium schweickerdtii | M.I. Claassen | image |
| Closterium scoticum var. fusiforme | W. Turner | image |
| Closterium scoticum | W. Turner | image |
| Closterium selenaeum | W.M. Maskell | image |
| Closterium selenastroides | Y.V. Roll | image |
| Closterium semicirculare | Willi Krieger & A.M. Scott | image |
| Closterium setaceum | C.G. Ehrenberg | image |
| Closterium setaceum | C.G. Ehrenberg ex J. Ralfs | image |
| Closterium setaceum f. recta | T.J.C. Irenee-Marie | image |
| Closterium setaceum f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium setaceum | L.A. Brebisson | image |
| Closterium setaceum var. elongatum | West & G.S. West | image |
| Closterium setaceum var. intermedium | (F.T. Kützing) G.L. Rabenhorst | image |
| Closterium setaceum var. rectum | T.J.C. Irenee-Marie | image |
| Closterium setaceum var. rollii | E.K. Kossinskaja | image |
| Closterium sigmoideum f. majus_('major') | West & G.S. West | image |
| Closterium sigmoideum | N.G. Lagerheim & C.F.O. Nordstedt | image |
| Closterium silesiacum | R.L. Grönblad | image |
| Closterium siliqua var. turgidum | T. Hinode | image |
| Closterium siliqua | West & G.S. West | image |
| Closterium sinense | J. Lütkemüller | image |
| Closterium soroksariense | M. Halász | image |
| Closterium spetsbergense f. longius | V.I. Poljansky | image |
| Closterium spetsbergense f. maius | H.T. Croasdale | image |
| Closterium spetsbergense f. majus_('major') | P. Schulz-Danzig | image |
| Closterium spetsbergense f. manshurica | B.V. Skvortzov | image |
| Closterium spetsbergense f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium spetsbergense | O.F. Borge | image |
| Closterium spetsbergense var. australe | G.I. Playfair | image |
| Closterium spetsbergense var. laticeps | R.L. Grönblad | image |
| Closterium spetsbergense var. palustre | G.I. Playfair | image |
| Closterium spetsbergense var. subafricanum | M.I. Claassen | image |
| Closterium spetsbergense var. subspetsbergense | (N.N. Woronichin) E.K. Kossinskaja | image |
| Closterium spinosporum var. minus | W. Hodgetts | image |
| Closterium spinosporum | W. Hodgetts | image |
| Closterium spirale | A.K.J. Corda | image |
| Closterium spiraliferum | J.P. Jacobsen | image |
| Closterium squamatum | C.G. Ehrenberg | image |
| Closterium stellenboschense | W. Hodgetts | image |
| Closterium striatum | K.P. Biswas | image |
| Closterium striatum | K.P. Biswas | image |
| Closterium strigosum | A.A. Nayal | image |
| Closterium strigosum f. brevius_('brevior') | S.P. Petkoff | image |
| Closterium strigosum f. minus_('minor') | C.C. Jao | image |
| Closterium strigosum | L.A. Brebisson | image |
| Closterium strigosum subsp. elegans | (G.S. West) F.M. Sarim & M.A.F. Faridi | image |
| Closterium strigosum var. elongatum | G.A. Klebs | image |
| Closterium strigosum var. typicum | G.A. Klebs | image |
| Closterium striolatum | C.G. Ehrenberg | image |
| Closterium striolatum | C.G. Ehrenberg ex J. Ralfs | image |
| Closterium striolatum f. attenuatum | P.E.E. Kaiser | image |
| Closterium striolatum f. minus_('minor') | K.E. Hirn | image |
| Closterium striolatum f. recta | West | image |
| Closterium striolatum f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium striolatum f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium striolatum f. tumida | J.N.F. Wille | image |
| Closterium striolatum var. alpinum | L. Viret | image |
| Closterium striolatum var. borgei | Willi Krieger | image |
| Closterium striolatum var. crenulatum | J.E. Weiss | image |
| Closterium striolatum var. elongatum | G.L. Rabenhorst | image |
| Closterium striolatum var. erectum | G.A. Klebs | image |
| Closterium striolatum var. genuinum | E.O.O. Kirchner | image |
| Closterium striolatum var. hinganicum | M. Noda & B.V. Skvortzov | image |
| Closterium striolatum var. intermedia | (J. Ralfs) J.P. Jacobsen | image |
| Closterium striolatum var. latior | K. Rosa | image |
| Closterium striolatum var. monolithum | L. Viret | image |
| Closterium striolatum var. nylstromicum | M.I. Claassen | image |
| Closterium striolatum var. orthonotum | J. Roy | image |
| Closterium striolatum var. rectum | M. Noda & B.V. Skvortzov | image |
| Closterium striolatum var. regulare | (L.A. Brebisson) G.A. Klebs | image |
| Closterium striolatum var. robustum | West & G.S. West | image |
| Closterium striolatum var. sitvense | R. Gutwinski | image |
| Closterium striolatum var. spirostriolatum | T.J.C. Irenee-Marie | image |
| Closterium striolatum var. subcostatum | O.F. Borge | image |
| Closterium striolatum var. subjuncida | (G. De Notaris) J.P. Jacobsen | image |
| Closterium striolatum var. subnylstromicum | M.I. Claassen | image |
| Closterium striolatum var. subpunctatum | M. Hirano | image |
| Closterium striolatum var. tumidum | G.L. Rabenhorst | image |
| Closterium striolatum var. typicum | G.A. Klebs | image |
| Closterium striolatum var. ulna | (G.W. Focke) Jacobsen | image |
| Closterium striolatum var. unogranulatum | M. Noda & B.V. Skvortzov | image |
| Closterium striolatum var. vulgare_('vulgaris') | J.P. Jacobsen | image |
| Closterium subacutum | G.A.S.F. Sampaio | image |
| Closterium subangulatum | R. Gutwinski | image |
| Closterium subangulatum | R. Gutwinski | image |
| Closterium subangustatum | West | image |
| Closterium subbiclavatum | E.N. Lacoste de Díaz | image |
| Closterium subcapitatum | West & G.S. West | image |
| Closterium subcostatum | C.F.O. Nordstedt | image |
| Closterium subcostatum var. dilatatum | Borge | image |
| Closterium subcrassum | W.B. Turner | image |
| Closterium subdecorum | M.I. Claassen | image |
| Closterium subdirectum | West | image |
| Closterium subfusiforme | E. Messikommer | image |
| Closterium subgibbum | Y.V. Roll | image |
| Closterium subjuncidiforme | R.L. Grönblad | image |
| Closterium subjuncidiforme var. attenuatum | E. Messikommer | image |
| Closterium subjuncidum f. minus_('minor') | M. Raciborski | image |
| Closterium subjuncidum | G. De Notaris | image |
| Closterium sublagoense | M.I. Claassen | image |
| Closterium sublanceolatum | N.N. Woronichin | image |
| Closterium sublineatum | R. Gutwinski | image |
| Closterium submalinvernianum | N.N. Woronichin | image |
| Closterium submoniliferum | N.N. Woronichin | image |
| Closterium subporrectum | West & G.S. West | image |
| Closterium subpronum var. lacustre | E.J. Lemmermann | image |
| Closterium subpronum var. lacustre | E.J. Lemmermann | image |
| Closterium subpronum | West & G.S. West | image |
| Closterium subrectum | L.A. Brebisson | image |
| Closterium subrostratum var. groenbladii | P. Bourrelly | image |
| Closterium subrostratum | Willi Krieger | image |
| Closterium subscoticiforme | R.L. Grönblad | image |
| Closterium subscoticum | R. Gutwinski | image |
| Closterium subsiliquum_('subsiliqua') | M.I. Claassen | image |
| Closterium subspetzbergense f. colorato-glabra | N.N. Woronichin | image |
| Closterium subspetzbergense f. colorato-striato-punctata | N.N. Woronichin | image |
| Closterium subspetzbergense f. incolorato-glabra | N.N. Woronichin | image |
| Closterium subspetzbergense | N.N. Woronichin | image |
| Closterium substrigosum | (M. Raciborski) West & G.S. West | image |
| Closterium subtile | L.A. Brebisson | image |
| Closterium subtruncatum | West & G.S. West | image |
| Closterium subturgidum | C.F.O. Nordstedt | image |
| Closterium subulatum | (F.T. Kützing) L.A. Brebisson | image |
| Closterium subulatum f. angustum | P. Compère | image |
| Closterium subulatum | L.A. Brebisson | image |
| Closterium subulatum var. controversum | L.A. Brebisson | image |
| Closterium subulatum var. latior | Y.V. Roll | image |
| Closterium subulatum var. minus | Willi Krieger & P. Bourrelly | image |
| Closterium subulatum var. sigmoideum | N. Woodhead & R.D. Tweed | image |
| Closterium sulcatum | L.A. Brebisson | image |
| Closterium tenerrimum | F.T. Kützing | image |
| Closterium tenerrimum | F.T. Kützing ex J. Ralfs | image |
| Closterium tenerum | N.N. Woronichin | image |
| Closterium tenue | F.T. Kützing | image |
| Closterium tenue | F.T. Kützing | image |
| Closterium thuretii_('thureti') | L.A. Brebisson | image |
| Closterium tortum | B.M. Griffiths | image |
| Closterium toxon f. elongatum | West & G.S. West | image |
| Closterium toxon f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium toxon f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium toxon var. validum | West | image |
| Closterium toxon | West | image |
| Closterium trabecula | C.G. Ehrenberg | image |
| Closterium trochiscosporum | West & G.S. West | image |
| Closterium truncatulum | Y.V. Roll | image |
| Closterium truncatum | L.A. Brebisson | image |
| Closterium truncatum | L.A. Brebisson | image |
| Closterium truncatum | M.I. Claassen | image |
| Closterium truncatum | W.B. Turner | image |
| Closterium tumidulum f. truncatum | K. Förster | image |
| Closterium tumidum f. borgeanum | K. Förster & F. Eckert | image |
| Closterium tumidum f. elongata | D. Milovanovic | image |
| Closterium tumidum f. macrosporum | W.R. Taylor | image |
| Closterium tumidum f. maior | K.P. Biswas | image |
| Closterium tumidum f. majus_('major') | T.J.C. Irenee-Marie | image |
| Closterium tumidum f. minus_('minor') | K.M. Strøm | image |
| Closterium tumidum | L.N. Johnson | image |
| Closterium tumidum var. angustum | M.I. Claassen | image |
| Closterium tumidum var. koreana | B.V. Skvortzov | image |
| Closterium tumidum var. nylandicum | R.L. Grönblad | image |
| Closterium tumidum var. sphaerospora | G.S. West | image |
| Closterium tumidum var. striatum | P. Bourrelly | image |
| Closterium turgidulum | F.T. Kützing | image |
| Closterium turgidulum | F.T. Kützing ex J. Ralfs | image |
| Closterium turgidum | C.G. Ehrenberg | image |
| Closterium turgidum | C.G. Ehrenberg ex J. Ralfs | image |
| Closterium turgidum f. bohemicum | K. Rosa | image |
| Closterium turgidum f. brasiliense_('brasiliensis') | C.F.O. Nordstedt | image |
| Closterium turgidum f. glabra | R. Gutwinski | image |
| Closterium turgidum f. glabra | R. Gutwinski | image |
| Closterium turgidum f. intermedium | J.A. Cushman | image |
| Closterium turgidum f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium turgidum subsp. giganteum | C.F.O. Nordstedt | image |
| Closterium turgidum var. borgei | G. Deflandre | image |
| Closterium turgidum var. costulatum | P. Bourrelly | image |
| Closterium turgidum var. curtum | J. Roy & J. Bisset | image |
| Closterium turgidum var. decoratum | West | image |
| Closterium turgidum var. groenbladii | Schulz-Danzig | image |
| Closterium turgidum var. kuetzingii | G.L. Rabenhorst | image |
| Closterium turgidum var. typicum | G.A. Klebs | image |
| Closterium ulna f. minus | J. Roubal | image |
| Closterium ulna | G.W. Focke | image |
| Closterium ulna var. constrictum | K.M. Stroøm | image |
| Closterium ulna var. multinucleatum | G. Deflandre | image |
| Closterium ulna var. robusta | P. Palik | image |
| Closterium ulnoides | G.A.S.F. Sampaio | image |
| Closterium uncinatum | F.T. Kützing | image |
| Closterium uncinatum | F.T. Kützing ex J. Ralfs | image |
| Closterium validum | West & G.S. West | image |
| Closterium varzinense | J. Sampaio | image |
| Closterium venus f. lata | T.J.C. Irenee-Marie | image |
| Closterium venus f. majus | V.G. Fedorov | image |
| Closterium venus f. majus_('major') | K.M. Strøm | image |
| Closterium venus f. minus_('minor') | T.J.C. Irenee-Marie | image |
| Closterium venus f. minus_('minor') | Y.V. Roll | image |
| Closterium venus f. sigmoideum | T.J.C. Irenee-Marie | image |
| Closterium venus f. torta | (B.M. Griffiths) G. Nygaard | image |
| Closterium venus f. tumida | J. Ruzicka | image |
| Closterium venus | F.T. Kützing | image |
| Closterium venus | F.T. Kützing ex J. Ralfs | image |
| Closterium venus subsp. crassum | F.M. Sarim & M.A.F. Faridi | image |
| Closterium venus subsp. croasdalei | F.M. Sarim & M.A.F. Faridi | image |
| Closterium venus subsp. incurvum | (L.A. Brebisson) F.M. Sarim & M.A.F. Faridi | image |
| Closterium venus subsp. maius_('maior') | (K.M. Strøm) F.M. Sarim & M.A.F. Faridi | image |
| Closterium venus var. apollonionis | H.T. Croasdale | image |
| Closterium venus var. crassum | H.T. Croasdale | image |
| Closterium venus var. debegenicum_('debegenica') | B.J. Cholnoky | image |
| Closterium venus var. inflatum | I.M. Claassen | image |
| Closterium verrucosum | Bailey | image |
| Closterium verrucosum | Y.V. Roll | image |
| Closterium versteegianum | C. Bernard | image |
| Closterium vulcanicum | B.V. Skvortzov & M. Noda | image |
| Closterium wagae | R. Gutwinski | image |
| Closterium wagae | R. Gutwinski | image |
| Closterium wallichii | W.B. Turner | image |
| Closterium warmbadianum | M.I. Claassen | image |
| Closterium warmbadianum var. porulosum | M.I. Claassen | image |
| Closterium wittrockianum var. africana | W. Schmidle | image |
| Closterium wittrockianum | W.B. Turner | image |
| Closterium wittrockii | W.B. Turner | image |
| Cylindrotheca closterium | (Ehrenberg) Reimann & Lewin | image |
| Cylindrotheca closterium var. californica | (Mereschkowsky) Reimann & Lewin | image |
| Cystodinium closterium | Pascher | image |
| Cystodinium closterium var. crassa | Bourrelly | image |
| EUCLOSTERIUM | (Wills) Hirano | image |
| EUCLOSTERIUM | J.N.F. Wille | image |
| GLENOCLOSTERIUM | H.J. Carter | image |
| Homoeocladia closterium | (Ehrenberg) Kuntze | image |
| Nitzschia closterium | (Kützing) W. Smith | image |
| Nitzschia closterium f. curvata | Lohmann | image |
| Nitzschia closterium f. minutissima | Starr | image |
| Nitzschia closterium f. tenuissima | Manguin | image |
| Nitzschia closterium var. recta | Gran & Angst | image |
| Nitzschia closterium var. striatula | Hasle | image |
| PALEOCLOSTERIUM | Baschnagel | image |
| PALEOCLOSTERIUM | Baschnagel | image |
| Paleoclosterium leptum | Baschnagel | image |
| Paleoclosterium leptum | Baschnagel | image |
| PHEOCLOSTERIUM | Tappan & Loeblich jr. | image |
| Pheoclosterium fuscinulaegerum | Tappan & Loeblich Jr. | image |
| Polysolenia closterium | C.G. Ehrenberg | image |
| RECTOCLOSTERIUM | L. Reverdin | image |
| Roya pseudoclosterium | (Roy) West & West | image |
| SPINOCLOSTERIUM | Ch. Bernard | image |
| Spinoclosterium curvatum | Bernard | image |
| Spinoclosterium curvatum var. spinosum | (Prescott) Prescott | image |
| Spinoclosterium cuspidatum | (Bailey) Hirano | image |