| Name | Author | Source | Citation | Year |
|---|
| Brachysira carabogazgolensis | S.A. Bulatov | Algologia | 30: 218, figs. 1-6 | 2020 |
| Euastrum bidentatum f. glabrum | A.M. Scott & Prescott | Hydrobiologia | 4: 378, pl. III: fig. 1 | 1952 |
| Euastrum bidentatum var. scottii | F.M. Costa & C.W.N. Moura in Costa et al. | Phytotaxa | 451: 38 | 2020 |
| Euastrum elegans f. prescottii | Kurt Förster | Nova Hedwigia | 23: 536, pl. 8: 3 | 1973 |
| Euastrum elegans var. prescottii | (Kurt Förster) F.M. Costa & C.W.N. Moura in Costa et al. | Phytotaxa | 451: 39 | 2020 |
| Euastrum informe f. oculatum | A.M. Scott & Prescott | Hydrobiologia | 4: 387, pl. III: fig. 8 | 1952 |
| Euastrum informe var. oculatum | (A.M. Scott & Prescott) F.M. Costa & C.W.N. Moura in Costa et al. | Phytotaxa | 451: 40 | 2020 |
| Euastrum westenii | F.M. Costa, I.B. Oliveira & C.W.N. Moura in Costa et al. | Phytotaxa | 451: 40, figs. 30-37 | 2020 |
| Halamphora siqueirosii | F.O. López-Fuerte, S.E. Sala & G. Murugan in López-Fuerte et al. | Phytotaxa | 451: 135, figs. 2-28 | 2020 |
| Hematodinium australe | D.A. Hudson & J.D. Shields | Diseases of Aquatic Organisms | 19: 111, figs. 6-9 | 1994 |
| Kurtkrammeria tiancaiensis | Y.-L. Li & W. Zhang in Zhang et al. | Phytotaxa | 451: 225, figs. 1-9 | 2020 |
| Navicula braunii var. moissacensis | Héribaud | Diat. Foss. Auvergne | 2: 63, pl. XI: fig. 17 | 1903 |
| Navicula davidovichii | D. Chudaev, A. Glushchenko, M. Kulikovskiy & J.P. Kociolek in Kulikovskiy et al. | Phytotaxa | 452: 86, figs. 1-24 | 2020 |
| Navicula dubitata | Héribaud | Diat. Foss. Auvergne | 2: 6, pl. IX: fig. 28 | 1903 |
| Neidium affine var. rhodanum ('rhodana') | J. Brun | Diatomiste | 2: pl. XIV: figs. 8-10 | 1895 |
| Neidium dubitatum | (Héribaud) Comère | La Nuova Notarisia, fascicolo commemorativo del 40 anno dalla fondazione della "Notarisia" (1886-1925): | 69 | 1925 |
| Neidium iridis var. rhodanum | (J. Brun) Comère | La Nuova Notarisia, fascicolo commemorativo del 40 anno dalla fondazione della "Notarisia" (1886-1925): | 69 | 1925 |
| Nitzschia moissacensis | (Héribaud) Meister | Arch. Hydrobiol. | 9: 229 | 1914 |
| Polysiphonia rhizoidea | Meñez | Pacific Science | 18: 217, fig. 5 | 1964 |
| Stauroneis amazonica | D.M. Williams & S. Blanco | Phytotaxa | 451: 53 | 2020 |
| Synedra delicatula | Ant. Mayer | Krypt. Forsch. | 1: 197, 212, no fig. | 1919 |
| Synedra ulna var. delicatula | (Ant. Mayer) A.D. Hardy ex R.A. Townsend in Townsend & Guiry | Notulae algarum | 149: 1 | 2020 |
| Tribonema bombycinum var. pallidum | (Kützing) R.A. Townsend in Townsend & Guiry | Notulae algarum | 149: 1 | 2020 |
| Triploceras gracile f. undulatum | (A.M. Scott & Prescott) R.A. Townsend in Townsend & Guiry | Notulae algarum | 149: 1 | 2020 |
| Triploceras gracile var. undulatum | A.M. Scott & Prescott | Rec. Amer.-Austral. Scientific Exped. Arnhem Land | 3: 27, fig. 3:8 | 1958 |
| Wilsonosiphonia rhizoidea | (Meñez) G.H. Boo, T.O. Cho, A.R. Sherwood & M.T. Fujii in Boo et al. | Phytotaxa | 451: 69 | 2020 |