| Name | Author | Source | Citation | Year |
|---|
| CALOTHRIX | C. Agardh | image |
| CALOTHRIX | C. Agardh ex Bornet & Flahault | image |
| CALOTHRIX subgenus | DICHOTHRIX (Zanard. ex Bornet & Flahault) Hansgirg | image |
| CALOTHRIX | | image |
| CALOTHRIX | | image |
| CALOTHRIX | | image |
| CALOTHRIX | | image |
| CALOTHRIX | | image |
| CALOTHRIX | | image |
| CALOTHRIX | | image |
| CALOTHRIX | | image |
| Calothrix aberrans | Cholnoky | image |
| Calothrix adscendens | Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 365 | 1886 |
| Calothrix aegagropila | Kützing | Alg. aq. dulc. germ. | 1: [4] | 1833 |
| Calothrix aegagropila | Kützing | image |
| Calothrix aegagropila | Kützing | image |
| Calothrix aequalis | Skuja | image |
| Calothrix aeruginea | (Kützing) Thuret | Ann. Sci. Nat. Bot., ser. 6, | 1: 381 | 1875 |
| Calothrix aeruginea | (Kützing) Thuret | image |
| Calothrix aeruginea | A. Braun | image |
| Calothrix aeruginea | Thuret ex Bornet & Flahault | Ann. Sci. Nat., Bot. ser. 7, | 3: 358 | 1886 |
| Calothrix aeruginea | Thuret ex Bornet & Flahault | Ann. Sci. Nat., Bot. ser. 7, | 4: 358 | 1886 (fixed by Art. 13(e), ICBN) |
| Calothrix aeruginea var. abbreviata | Setchell & Gardner | image |
| Calothrix aeruginea var. crassior | Ercegovic | image |
| Calothrix aeruginosa f. minor | Melnikova | image |
| Calothrix aeruginosa | Woronichin | image |
| Calothrix aeruginosa | Woronichin | image |
| Calothrix aestuarii | Gayral & Mazancourt | image |
| Calothrix africana | Schmidle | image |
| Calothrix agardhii | Crouan frat. | image |
| Calothrix agardhii | P. Crouan & H. Crouan | Fl. Finist. | 118, pl. 3: fig. 27 bis (misprinted 28 in plate) | 1867 |
| Calothrix allorgei | Frémy | image |
| Calothrix alternans | Y.Y. Li | image |
| Calothrix ambigua | Meneghini | image |
| Calothrix ambigua | Meneghini mss. | image |
| Calothrix anomala | Mitra | image |
| Calothrix antarctica | Fritsch | image |
| Calothrix articulata | (Reinsch) Forti | image |
| Calothrix atricha | Frémy | image |
| Calothrix atroviridis | Harvey | image |
| Calothrix australiensis | Scott & Prescott | image |
| Calothrix austrogeorgica | (Carlson) Pankow, Haendel & Richter | Beih. Nova Hedwigia | 103: 87 | 1991 |
| Calothrix baileyi | J.C. Copeland | image |
| Calothrix balearica | Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 345 (=key), 348 | 1886 |
| Calothrix balearica var. tenuis | W. West & G.S. West | image |
| Calothrix baueriana | (Grunow) Hansgirg | image |
| Calothrix berkeleyana | Carmichael | image |
| Calothrix bharadwajae | G. De Toni | image |
| Calothrix borealis | Whelden | image |
| Calothrix borziana | De Toni f. | image |
| Calothrix bossei | Frémy | image |
| Calothrix braunii | Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 368 | 1886 |
| Calothrix braunii f. major | Pandey | image |
| Calothrix braunii f. major | Pandey | image |
| Calothrix braunii var. contorta | Gardner | image |
| Calothrix braunii var. elongata | R.B. Singh | image |
| Calothrix braunii var. maxima | Philson | image |
| Calothrix braunii var. mollis | Gardner | image |
| Calothrix brebissonii | Kützing | image |
| Calothrix brebissonii | Kützing ex Wolle | Fresh-water Alg. U.S.: | 238, pl. CLXIX: figs. 5-7 | 1887 |
| Calothrix brebissonii | Kützing | Bot. Zeit. | 5: 180 | 1847 |
| Calothrix breviarticulata f. tatrensis | K. Starmach | Fragm. Floristic. Geobot. | 19: 494, fig. 21 | 1973 |
| Calothrix breviarticulata | W. West & G.S. West | image |
| Calothrix brevis | Liebmann | image |
| Calothrix brevissima | G.S. West | image |
| Calothrix brevissima var. intermedia | Laloraya & Mitra | image |
| Calothrix brevissima var. intermedia | Laloraya & Mitra invalid | image |
| Calothrix brevissima var. moniliformis_('moniliforma') | Ghose | image |
| Calothrix bugensis | Poljansky | Bot. Mater., Spor. Rast., Bot. Inst. Akad. Nauk SSSR | 10: 17, figs. 1, 2 | 1955 |
| Calothrix caespitosa | (Kützing) Hansgirg | image |
| Calothrix caespitula | Harvey | image |
| Calothrix calida | P. Richter | image |
| Calothrix candelii | González Guerrero | image |
| Calothrix capitata | B. Uher | Fottea | 7: 34, fig. 2 | 2007 |
| Calothrix cartilaginea | G.S. West | image |
| Calothrix castellii | (Massalongo) Bornet & Flahault | image |
| Calothrix castellii | Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 369 | 1886 |
| Calothrix castellii var. samastipurensis_('samastipurense') | C.S. Rao | image |
| Calothrix caulerpae | Zanardini | image |
| Calothrix cavernarum | J. Copeland | image |
| Calothrix cesatii | Rabenhorst | image |
| Calothrix cesatii | Rabenhorst | image |
| Calothrix cespitosa | Kützing | image |
| Calothrix chapmanii | Lami & Meslin | image |
| Calothrix charicola | J. Copeland | image |
| Calothrix cirrhosa | (Harvey) Bonhomme | image |
| Calothrix clausa | Setchell & Gardner | image |
| Calothrix clavata | G.S. West | image |
| Calothrix clavatoides | Ghose | image |
| Calothrix coactilis | (Kützing) Rabenhorst | image |
| Calothrix codicola | Setchell & Gardner | image |
| Calothrix columbiana | G.S. West | image |
| Calothrix columbiana var. constricta | Gonzalves & Kamat | image |
| Calothrix comoides | Harvey | image |
| Calothrix comoides | Harvey | Syn. Cat. Austral. Tasman. Alg. | lxii | 1863 |
| Calothrix compacta | (Bornet & Flahault) Hansgirg | image |
| Calothrix compacta | (C. Agardh) Margalef | image |
| Calothrix compacta | C.-C. Jao | Sinensia | 10: 223, pl. IV: fig. 1 | 1939 |
| Calothrix compacta | Jao | image |
| Calothrix conferta | Crouan fr. | image |
| Calothrix confervicola | (Dillwyn) C. Agardh | Syst. Alg.: | 70 | 1824 |
| Calothrix confervicola | C. Agardh ex Bornet & Flahault | image |
| Calothrix confervicola var. mediterranea | Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 351 | 1886 |
| Calothrix confervicola var. purpurea | Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 350 | 1886 |
| Calothrix confervicola var. zostericola | (Lyngbye) Crouan frat. | image |
| Calothrix conica | Gardner | image |
| Calothrix conica | N.L. Gardner | Mem. New York Bot. Gard. | 7: 66, pl. 13: fig. 18 | 1927 |
| Calothrix consociata | (Kützing) Bornet & Flahault | image |
| Calothrix consociata | Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 351 | 1886 |
| Calothrix contarenii | (Zanardini) Bornet & Flahault | Ann. Sci. Nat. Bot., ser. 7, | 3: 355 | 1886 |
| Calothrix contarenii var. sanctinectarii_('sancti-nectarii') | Frémy | image |
| Calothrix contorta | Biasoletto | image |
| Calothrix contorta | Jao | image |
| Calothrix coriacea | J. Copeland | image |
| Calothrix cottonii | De Toni f. | image |
| Calothrix cresswellii | Harvey | Phycol. Brit. | expl. pl. LXXVI | 1846 |
| Calothrix crustacea | (C. Agardh) Wolle | image |
| Calothrix crustacea f. prolifera | (Flahault) N.L. Gardner & F.S. Collins in Collins, Holden, & Setchell | Phycoth. Bor.-Amer.: | no. 1168 | 1904 |
| Calothrix crustacea f. simulans | Collins | image |
| Calothrix crustacea f. simulans | F.S. Collins in Collins, Holden, & Setchell | Phyc. Bor.-Amer.: | 1406 | 1907 |
| Calothrix crustacea | Thuret | image |
| Calothrix crustacea | Thuret ex Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 359 | 1886 |
| Calothrix crustacea var. crassa | S.M.F. Silva | Hoehnea | 18{1}: 115, figs. 35-37 | 1992 |
| Calothrix cyanea | J. Agardh | image |
| Calothrix cylindrica | Frémy | image |
| Calothrix cystosirae | Schiffner | Oesterr. Bot. Z. | 82: 300, no fig. | 1933 |
| Calothrix debii | Bharadwaja | image |
| Calothrix decipiens | Thuret | image |
| Calothrix decolorata | (Naegeli) Hansgirg | image |
| Calothrix desertica | G.H. Schwabe | Österr. Bot. Z. | 107: 282, figs. 1-5 | 1960 |
| Calothrix desikacharyensis | Vasishta | image |
| Calothrix dillwynii | (Harvey) Kützing | image |
| Calothrix dillwynii | Wolle | Fresh-water Alg. U.S.: | 237, pl. CLXVIII: figs. 3, 4 | 1887 |
| Calothrix distorta | (Müller) C. Agardh | image |
| Calothrix distorta | (O.F. Müller) C. Agardh | Syst.: | 72 | 1824 |
| Calothrix distorta var. flaccida | C. Agardh | image |
| Calothrix divergens | C.L. Sant'Anna, S.M.F. Silva, & L.H.Z. Branco | Hoehnea | 18{2}: 84, figs. 40, 41 | 1992 |
| Calothrix dolichomeres | Skuja | image |
| Calothrix donnellii | (Wolle) Forti | image |
| Calothrix dumus | C.D. Villanueva & D.A. Casamatta in Villanueva et al. | Phytotaxa | 387: 12, fig. 10 | 2019 |
| Calothrix dura | Harvey | image |
| Calothrix elenkinii f. edaphica | Melnikova | image |
| Calothrix elenkinii | Kossinskaja | image |
| Calothrix elongata | Zanardini | image |
| Calothrix endophytica | Cotton | image |
| Calothrix endophytica | Lemmermann | image |
| Calothrix epiphytica f. major | Obukhova | image |
| Calothrix epiphytica var. major | Vasishta | image |
| Calothrix epiphytica | W. West & G.S. West | J. Bot. (London) | 35: 240 | 1897 |
| Calothrix estonica | Kukk | image |
| Calothrix evanescens | Gardner | image |
| Calothrix evanescens | N.L. Gardner | Mem. New York Bot. Gard. | 7: 69, pl. 13: fig. 22 | 1927 |
| Calothrix fasciculata | C. Agardh | image |
| Calothrix fasciculata f. incrustans | Collins | image |
| Calothrix fasciculata f. incrustans | Collins | image |
| Calothrix fasciculata f. incrustans | F.S. Collins in Collins, Holden, & Setchell | Phyc. Bor.-Amer.: | 561 | 1899 |
| Calothrix fasciculata | Lenormand | image |
| Calothrix feldmannii | Bourrelly | image |
| Calothrix flahaultii_('flahaulti') | Frémy | image |
| Calothrix flamulorum | C.L. Sant'Anna, S.M.F. Silva, & L.H.Z. Branco | Hoehnea | 18{2}: 85, figs. 36-39 | 1992 |
| Calothrix floccosa | (Woronichin) Geitler in Pascher | Süssw.-Fl. | 12: 228 | 1925 |
| Calothrix fonticola | Brabez | image |
| Calothrix fontinalis | (L.) C. Agardh | image |
| Calothrix fontinalis | (Linnaeus) C. Agardh | Syst. Alg.: | 73 | 1824 |
| Calothrix fortii | De Toni f. | image |
| Calothrix foveolarum | Ercegovic | image |
| Calothrix friesii | (C. Agardh) J.E. Gray | image |
| Calothrix fritschii | Bharadwaja | image |
| Calothrix fritschii | De Toni f. | image |
| Calothrix fritschii f. flexuosa | (Fritsch) De Toni f. | image |
| Calothrix fuellebornii_('Füllebornii') | Schmidle | image |
| Calothrix fusca | (Kützing) Bornet & Flahault | image |
| Calothrix fusca | Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 364 | 1886 |
| Calothrix fusca f. ampliusvaginata | Starmach | image |
| Calothrix fusca f. durabilis | Starmach | image |
| Calothrix fusca var. crassa | C.S. Rao | image |
| Calothrix fuscescens | Brébisson & Godey | image |
| Calothrix fuscoviolacea_('fusco-violacea') | Crouan fr. | image |
| Calothrix fuscoviolacea_('fusco-violacea') | P. Crouan & H. Crouan | Ann. Sci. Nat. Bot., ser. 4, | 12: 291, pl. 22: fig. H | 1859 |
| Calothrix galpinii | K. Cholnoky-Pfannkuche | Nova Hedwigia | 15: 431, pl. 48(1): figs. 1-5 | 1968 |
| Calothrix gardneri | De Toni f. | image |
| Calothrix geitleri | J. Copeland | image |
| Calothrix geitonos | Skuja | image |
| Calothrix gelatinosa | Fritsch & Rich | image |
| Calothrix genuflexa | Philson | image |
| Calothrix ghosei | Bharadwaja | image |
| Calothrix gigas | J. Copeland | image |
| Calothrix gloeocola | Skuja | image |
| Calothrix gloeocola var. tenuis | Vasishta | image |
| Calothrix goetzei | Schmidle | image |
| Calothrix gracilis | (Rabenhorst) Wolle | image |
| Calothrix gracilis f. flexuosa | Fritsch & Stephens | image |
| Calothrix gracilis | Fritsch | image |
| Calothrix gracilis | Wolle | Fresh-water Alg. U.S.: | 237, pl. CLXXIII: figs. 2, 3 | 1887 |
| Calothrix gypsophila | (Bornet & Flahault) Wolle | Fresh-water Alg. U.S.: | 237 | 1887 |
| Calothrix gypsophila | (Kützing) Thuret | image |
| Calothrix gypsophila f. rupestris-saccoidea | Poljansky | image |
| Calothrix gypsophila f. saccoideofruticulosa_('saccoideo-fruticulosa') | Poljansky | image |
| Calothrix gypsophila f. turfosa | Tarnavschi & Mitroiu | image |
| Calothrix hansgirgii_('Hansgirgi') | Schmidle | image |
| Calothrix harveyi | Kjellman | image |
| Calothrix hosfordii | Wolle | Fresh-water Alg. U.S.: | 239, pl. CLXIX: figs. 1, 2 | 1887 |
| Calothrix hunanica | Jao | image |
| Calothrix hydnoides | Harvey in Hooker | Brit. Fl. | 2{1}: 368 | 1833 |
| Calothrix inaequabilis | Cado | image |
| Calothrix indica | Montagne | image |
| Calothrix infestans | Harvey | image |
| Calothrix infestans | Harvey ex Forti in De Toni | Syll. Alg. | 5: 628 | 1907 |
| Calothrix infestans | Harvey in Hooker | Fl. Tasman. | 2: 343 | 1859 |
| Calothrix inserta | Nygaard | image |
| Calothrix intermedia | Gardner | image |
| Calothrix interrupta | Carmichael in Hooker | Brit. Fl. | 2(1): 368 | 1833 |
| Calothrix interrupta | Kützing | image |
| Calothrix intertexta | (Hilse) Kirchner | image |
| Calothrix intertexta | Brébisson ms. | image |
| Calothrix intorta | Jao | image |
| Calothrix intracellularis | Vasishta | image |
| Calothrix intricata | Fritsch | image |
| Calothrix involvens | Areschoug | image |
| Calothrix javanica | De Wildeman | image |
| Calothrix javanica f. major | M. Gupta & D.C. Pandey | image |
| Calothrix javanica f. marina | Weber-van Bosse | image |
| Calothrix javanica var. fertilissima | Tiwari | image |
| Calothrix javanica var. fertilissima | Tiwari | image |
| Calothrix juliana | (Meneghini) Bornet & Flahault | image |
| Calothrix juliana | Bornet & Flahault | Ann. Sci. Nat. Bot., ser. 7, | 3: 348 | 1886 |
| Calothrix juliana var. tenuior | Gardner | image |
| Calothrix juliana var. tenuior | N.L. Gardner | Mem. New York Bot. Gard. | 7: 69 | 1927 |
| Calothrix karnatakensis f. varians | Gonzalves & Kamat | image |
| Calothrix karnatakensis | Gonzalves & Kamat | image |
| Calothrix karnatakensis var. major | Gonzalves & Kamat | image |
| Calothrix kawraiskyi | Schmidle | Trudy Tiflissk. Bot. Sada | 2: 273 | 1897 |
| Calothrix kossinskajae | V.I. Poljansky | Russ. Arkh. Protist. | 6: 63 (R), 70, pl. IV: figs. 1-4 | 1927 |
| Calothrix kossinskajae | W. Poljansky | image |
| Calothrix kuetzingiana | (Naegeli) Hansgirg | image |
| Calothrix kuntzei | P. Richter | image |
| Calothrix lacucola | Wolle | Fresh-water Alg. U.S.: | 239, pl. CLXXII: fig. 1 | 1887 |
| Calothrix lamellata | Harvey ms. | image |
| Calothrix lamellosa | Chu & Wu nom. prov. | image |
| Calothrix lanata | (Desvaux) C. Agardh | image |
| Calothrix laurenciae | Setchell & Gardner | image |
| Calothrix leineri | A. Braun ex Kützing | image |
| Calothrix limbata | Harvey | image |
| Calothrix limbata | Harvey mss. nom. nudum | image |
| Calothrix limbata | Harvey | Phycol. Austral. | 5: lxi | 1863 |
| Calothrix limnicola | Scherffel & Kol | image |
| Calothrix linearis | N.L. Gardner | Rhodora | 28: 3 | 1926 |
| Calothrix listeana | (Rabenhorst) Hansgirg | image |
| Calothrix litoralis | Anand | image |
| Calothrix litoralis | Anand | image |
| Calothrix longifila | Taylor | image |
| Calothrix longifilamentosa | Chu & Wu nom. prov. | image |
| Calothrix longissima | Hirose | image |
| Calothrix lucifuga | (Harvey) J.E. Cray | image |
| Calothrix lucifuga | Carmichael mss. | image |
| Calothrix lucknowensis_('lucknowense') | Prasad & Mehrotra | image |
| Calothrix luteofusca | C. Agardh | image |
| Calothrix luteola | Greville | image |
| Calothrix lutescens | (Kützing) Hansgirg | image |
| Calothrix lutescens | Meneghini | image |
| Calothrix maculiformis_('maculaeformis') | Zanardini | image |
| Calothrix major | Kützing | image |
| Calothrix marchica f. minor | Bongale | image |
| Calothrix marchica | Lemmermann | Abh. Naturw. Ver. Bremen | 23: 248, figs. 1, 2 | 1914 |
| Calothrix marchica var. brevifilamentosa | Bongale | image |
| Calothrix marchica var. crassa | C.B. Rao | image |
| Calothrix marchica var. intermedia | C.B. Rao | image |
| Calothrix marchica var. varians | Pantastico, Rubio, & Baticados | image |
| Calothrix maxima | Martens | image |
| Calothrix membranacea | Schmidle | image |
| Calothrix meneghiniana | (Kützing) Kirchner | image |
| Calothrix meneghiniana | Dalla Torre & Sarnthein | Algen Tirol, Vorarlberg und Liechtenstein: | 133 | 1901 |
| Calothrix meneghiniana | Kirchner ex Wolle | Fresh-water Alg. U.S.: | 238, pl. CLXX: figs. 5-7 | 1887 |
| Calothrix micromeres | Skuja | image |
| Calothrix minima | Frémy | image |
| Calothrix minuscula | Weber-van Bosse | Siboga-Exped. Monogr. | 59: 42, pl. I: figs. 10, 11 | 1913 |
| Calothrix minuta | (Reinsch) Forti | image |
| Calothrix minuta | Bennett | image |
| Calothrix minutissima | Moris & De Notaris | image |
| Calothrix mirabilis | (Dillwyn) C. Agardh | Syst.: | 72 | 1824 |
| Calothrix mirabilis var. rupicola | Crouan frat. | image |
| Calothrix moniliformis | V. Das & Mitra invalid | image |
| Calothrix mucistricta | Ercegovic | image |
| Calothrix mucor | (Roth) C. Agardh | image |
| Calothrix muscicola | (Kützing) Rabenhorst | image |
| Calothrix muscicola var. pumila | (Kützing) Rabenhorst | image |
| Calothrix muscicola var. pygmaea | (Kützing) Rabenhorst | image |
| Calothrix mutabilis | Zanardini | image |
| Calothrix mutnalensis | Bongale | image |
| Calothrix nemalionis | Zanardini | image |
| Calothrix nidulans | Setchell & Gardner | image |
| Calothrix nivea | (Dillwyn) C. Agardh | image |
| Calothrix nodulosa | Setchell & Gardner | image |
| Calothrix nova | Biasoletto | image |
| Calothrix obscura | Crouan frat. | image |
| Calothrix obtusa | Brabez | image |
| Calothrix olivacea | Biasoletto | image |
| Calothrix olivacea | Hooker f. & Harvey | image |
| Calothrix omeiensis | Chu | image |
| Calothrix orsiniana | (Bornet & Flahault) Wolle | Fresh-water Alg. U.S.: | 236 | 1887 |
| Calothrix orsiniana | (Kützing) Thuret | image |
| Calothrix orsiniana | Thuret ex Engler | image |
| Calothrix orsiniana var. africana | (Frémy) Bourrelly | Rev. Hydrobiol. Trop. | 17: 32 | 1984 |
| Calothrix orsiniana var. intertexta | (Grunow) | image |
| Calothrix orsiniana var. intertexta | (Grunow) Hansgirg | Prodr. Alg. Böhmen | 2: 52 | 1892 |
| Calothrix oryzae | R. Daradhiyar & P.K. Daradhiyar | image |
| Calothrix pachyderma | Chu & Wu nom. prov. | image |
| Calothrix pannosa | C. Agardh | image |
| Calothrix paradoxa | (Kützing) Hansgirg | image |
| Calothrix parasitica | (Chauvin) Thuret | Ann. Sci. Nat. Bot., ser. 6, | 1: 381 | 1875 |
| Calothrix parasitica | Thuret ex Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 357 | 1886 (fixed by Art. 13(e), ICBN) |
| Calothrix parietaria | Thuret | image |
| Calothrix parietina | (Nägeli ex Kützing) Thuret | Ann. Sci. Nat. Bot., ser. 6, | 1: 381 | 1875 |
| Calothrix parietina | (Nägeli) Thuret | image |
| Calothrix parietina f. brevis | Ercegovic | image |
| Calothrix parietina f. crassior | Ercegovic | image |
| Calothrix parietina f. nodosa | Ercegovic | image |
| Calothrix parietina f. polymorpha | [T. Mrozińska] | Arch. Hydrobiol. Suppl. | 85 (Algol. Stud. 58): 39, figs. 5, 13 | 1990 |
| Calothrix parietina f. polymorpha | T. Mrozinska | image |
| Calothrix parietina | Thuret ex Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 347 (=key), 366 | 1886 (fixed by Art. 13(e), ICBN) |
| Calothrix parietina var. africana | Fritsch | image |
| Calothrix parietina var. caespitosa | (Kützing) | image |
| Calothrix parietina var. caespitosa | (Kützing) | image |
| Calothrix parietina var. caespitosa | (Kützing) Hansgirg | Prodr. Alg. Böhmen | 2: 49 | 1892 |
| Calothrix parietina var. caespitosa | Hansgirg | SitzBer. K. Böhm. Ges. Wiss., Math.-Naturw. Cl. | 1892: 138 | 1892 |
| Calothrix parietina var. decolorata | (Naegeli ex Kützing) Hansgirg | image |
| Calothrix parietina var. decolorata | Hansgirg | Prodr. Alg. Böhmen | 2: 49 | 1892 |
| Calothrix parietina var. hibernica | West & West | image |
| Calothrix parietina var. pluvialis | (A. Braun) Hansgirg | image |
| Calothrix parietina var. sabulicola | (A. Braun ex Kützing) Hansgirg | image |
| Calothrix parietina var. sabulicola | Hansgirg | Prodr. Alg. Böhmen | 2: 49 | 1892 |
| Calothrix parietina var. salina | (Kützing) Hansgirg | image |
| Calothrix parietina var. salina | (Kützing) Hansgirg | image |
| Calothrix parietina var. salina | Hansgirg | Prodr. Alg. Böhmen | 2: 49 | 1892 |
| Calothrix parietina var. thermalis | G.S. West | image |
| Calothrix parietina var. torulosa | Gardner | image |
| Calothrix parietina var. torulosa | N.L. Gardner | Mem. New York Bot. Gard. | 7: 67 | 1927 |
| Calothrix parva | Ercegovic | image |
| Calothrix pilosa | Harvey | Ner. Bor.-Amer. | 3: 106, pl. XLVIII.C | 1858 |
| Calothrix pilosa | Harvey ex Bornet & Flahault | Ann. Sci. Nat. Bot., ser. 7, | 3: 363 | 1886 |
| Calothrix polymorpha | Y.Y. Li | image |
| Calothrix prolifera | Bornet & Flahault | image |
| Calothrix prolifera | Flahault in Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 361 | 1886 |
| Calothrix pulchra | Kützing | image |
| Calothrix pulvinata | (Mertens) C. Agardh | Syst. Alg.: | 71 | 1824 |
| Calothrix pulvinata f. prostrata | (Anand) Powell | image |
| Calothrix pulvinata f. tenuior | (Suringar) Forti | image |
| Calothrix pulvinata var. prostrata | Anand | image |
| Calothrix pulvinata var. prostrata | Anand | image |
| Calothrix purpurascens | Kunze probably mscr. | image |
| Calothrix purpurea | Meneghini | image |
| Calothrix putida | Suhr | image |
| Calothrix radiosa f. aeruginea | Rabenhorst | image |
| Calothrix radiosa f. fuscescens | Rabenhorst | image |
| Calothrix radiosa | Kützing | image |
| Calothrix radiosa | Wolle | Fresh-water Alg. U.S.: | 238, pl. CLXX: figs. 1, 2 | 1887 |
| Calothrix ramenskii | Elenkin | image |
| Calothrix ramenskii var. minor | Woronichin | image |
| Calothrix ramentacea | C. Agardh | image |
| Calothrix ramosa | Bharadwaja | image |
| Calothrix recta | Kützing | image |
| Calothrix rectangularis | Setchell & Gardner | image |
| Calothrix rectangularis | Setchell & N.L. Gardner in Gardner | Univ. Calif. Publ. Bot. | 6: 472, pl. 40: fig. 21 | 1918 |
| Calothrix reptans | Geitler | image |
| Calothrix reticulata | Berkeley | image |
| Calothrix rhizomatoidea | P. Reinsch | image |
| Calothrix rhizomatoidea | P. Reinsch | image |
| Calothrix rhizosoleniae | Lemmermann | image |
| Calothrix rigida | Harvey ms. | image |
| Calothrix rivularis | P. Crouan & H. Crouan in Mazé | Hydrophytes Guyane Franc\*,.: | 10 | 1868 |
| Calothrix robusta | Setchell & Gardner | image |
| Calothrix robusta | Setchell & N.L. Gardner in Gardner | Univ. Calif. Publ. Bot. | 6: 473, pl. 40: fig. 22 | 1918 |
| Calothrix rodriguezii | Bourrelly | image |
| Calothrix rosea | Taylor | image |
| Calothrix rubra | (Crouan frat.) Bornet & Flahault | image |
| Calothrix rubra | Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 345 (=key), 347 | 1886 |
| Calothrix rufescens | Carmichael | image |
| Calothrix sabulicola | (A. Braun ex Kützing) Kirchner | image |
| Calothrix salina | (Kützing) Hansgirg | image |
| Calothrix sandriana | Frauenfeld | image |
| Calothrix sandvicensis_('sandvicense') | (Nordstedt) Schmidle | image |
| Calothrix santapaui | Gonzalves & Kamat | image |
| Calothrix schweickerdtii | Cholnoky | image |
| Calothrix scopulorum | (Weber & Mohr) C. Agardh | Syst. Alg.: | 70 | 1824 |
| Calothrix scopulorum var. vivipara | (Harvey) Farlow | image |
| Calothrix scytonemicola | Tilden | image |
| Calothrix scytonemicola var. africana | Cholnoky | image |
| Calothrix scytonemicola var. brasiliensis | Borge | image |
| Calothrix scytonemicola var. major | Vasishta | image |
| Calothrix semiplena | C. Agardh | image |
| Calothrix semiplena | C. Agardh | Flora | 10: 634 | 1827 |
| Calothrix seriata | (Setchell & N.L. Gardner) Kossinskaya | Opred. Morsk. Sinez. Vodor.: | 153 | 1948 |
| Calothrix simplex | Gardner | image |
| Calothrix simplex | N.L. Gardner | Mem. New York Bot. Gard. | 7: 66, pl. 13: fig. 19 | 1927 |
| Calothrix simulans | Gardner | image |
| Calothrix sinica | Molinari & Guiry | Notulae algarum | 184: 2 | 2021 |
| Calothrix smithii | (Berkeley & Thwaites) M.C. Cooke | Brit. Fresh-w. Alg.: | 277 | 1884 |
| Calothrix sordida | Zanardini | image |
| Calothrix sphaerospora | Prasad & Srivastava | image |
| Calothrix stagnalis | Gomont | image |
| Calothrix stellaris | Bornet & Flahault | Ann. Sci. Nat. Bot. ser. 7, | 3: 365 | 1886 |
| Calothrix stellulata | Zanardini | image |
| Calothrix stuposa | Kützing | image |
| Calothrix subantarctica | Jao | image |
| Calothrix submarchica | Archibald | image |
| Calothrix submarina | Crouan fr. | image |
| Calothrix subsimplex | Jao | image |
| Calothrix subsimplex var. kwangsiensis | Jao | image |
| Calothrix synplocoides | P. Reinsch | image |
| Calothrix synplocoides | Reinsch | Abh. Senckenberg. Naturf. Ges. | 6: 112, no fig. | 1866 |
| Calothrix tenella | Gardner | image |
| Calothrix tenella | N.L. Gardner | Mem. New York Bot. Gard. | 7: 67, pl. 13: fig. 20 | 1927 |
| Calothrix tenuissima | (J.E. Smith) J.E. Gray | image |
| Calothrix tenuissima | A. Braun | image |
| Calothrix tenuissima | Schousboe | image |
| Calothrix thermalis | (Schwabe) Hansgirg | image |
| Calothrix thermalis f. tildenii | Poljansky | image |
| Calothrix thermalis_('thermale') | (Schwabe) Hansgirg | image |
| Calothrix thermalis_('thermale') | Hansgirg | Österr. Bot. Z. | 34: 279 | 1884 |
| Calothrix tinctoria | C. Agardh | image |
| Calothrix tomasini | Kützing & Biasoletto | image |
| Calothrix tomasini | Kützing | image |
| Calothrix tomasiniana | Kützing | image |
| Calothrix trochicola | Crouan frat. | image |
| Calothrix turfosa | Geitler | image |
| Calothrix tuzsonii_('Tuzsoni') | Palik | image |
| Calothrix variegata | Zanardini | image |
| Calothrix vermicularis | Kützing | image |
| Calothrix viguieri | Frémy | image |
| Calothrix violacea | (Wolle) Forti | image |
| Calothrix violacea | O. Jaag | image |
| Calothrix violacea | Zanardini | image |
| Calothrix vivipara | Harvey | image |
| Calothrix weberi | Schmidle | image |
| Calothrix wembaerensis | Hieronymus & Schmidle | image |
| Calothrix wembaerensis var. epiphytica | Pandey & Mitra | image |
| Calothrix wembaerensis var. epiphytica | Pandey & Mitra | image |
| Calothrix wembaerensis var. fusca | Behre | image |
| Calothrix wembaerensis var. minor | Gonzalves & Kamat | image |
| Calothrix wembaerensis var. tenuis | Laloraya & Mitra | image |
| Calothrix wembaerensis var. tenuis | Laloraya & Mitra invalid | image |
| Calothrix wrangelii | (C. Agardh) C. Agardh | image |
| DULCICALOTHRIX | A.G. Saraf et al. | FEMS Microbiology Letters | 366{17}: 8 | 2019 |
| Dulcicalothrix alborzica | B. Nowruzi & S. Shalygin | Fottea | 21: 237, figs. 2, 3 | 2021 |
| Dulcicalothrix desertica | (G.H. Schwabe) A.G. Saraf et al. | FEMS Microbiology Letters | 366{17}: 9 | 2019 |
| Dulcicalothrix necridiiformans | A.G. Saraf et al. | FEMS Microbiology Letters | 366{17}: 8, figs. 1, 2 | 2019 |
| EUCALOTHRIX | (Bornet & Flahault) Hansgirg | image |
| EUCALOTHRIX | Bornet & Flahault | Mém. Soc. Natl. Sc. Nat. et Math. Cherbourg | 25: 201 | 1885 |
| EUCALOTHRIX | J.-B.E. Bornet & C.H.M. Flahault | image |
| EUCALOTHRIX | J.B.E. Bornet & C.H.M. Flahault | image |
| Herposiphonia calothrix | (Harvey) H.B.S. Womersley | Mar. Benth. Fl. S. Australia | 3D: 290 | 2003 |
| Lophosiphonia calothrix | (Harvey) De Toni | image |
| Polysiphonia calothrix | Harvey | Trans. Roy. Irish Acad. | 22 (Sci.): 541 | 1855 |
| Vertebrata calothrix | (Harvey) Kuntze | image |