| Name | Author | Source | Citation | Year |
|---|
| Boergeseniella martensiana | (Kützing) Ardré | Port. Acta Biol., ser. B, | 10: 330 | 1970 |
| Cosmarium clepsydra var. sumatranum | (A.M. Scott & Prescott) G.J.P. Ramos & C.W.N. Moura in Ramos et al. | Notulae algarum | 146: 1 | 2020 |
| Cosmarium commissurale var. cruciforme | (Kurt Förster) G.J.P. Ramos & C.W.N. Moura in Ramos et al. | Notulae algarum | 146: 1 | 2020 |
| Cosmarium exiguum f. incrassatum | A.M. Scott & Grönblad | Acta Soc. Sci. Fenn., n.s. B, | 2{8}: 17, pl. 8: figs. 9, 10 | 1957 |
| Cosmarium exiguum var. incrassatum | (A.M. Scott & Grönblad) M.A. Santos & C.W.N. Moura in Ramos et al. | Notulae algarum | 146: 2 | 2020 |
| Cosmarium monomazum f. brasiliense | Kurt Förster & Eckert in Förster | Hydrobiologia | 23: 396, pl. 22: fig. 24; pl. 47: fig. 18 | 1964 |
| Cosmarium monomazum var. brasiliense | (Kurt Förster & Eckert) G.J.P. Ramos & C.W.N. Moura in Ramos et al. | Notulae algarum | 146: 2 | 2020 |
| Cosmarium protuberans var. sumatranum | A.M. Scott & Prescott | Hydrobiologia | 17: 66, pl. 32: fig. 18 | 1961 |
| Cosmarium sphalerostichum f. bituberculatum | Kurt Förster & Eckert in Förster | Revue Algologique, ser. 2, | 7: 75, pl. 5: fig. 27, pl. 5, fig. 10 | 1963 |
| Cosmarium sphalerostichum var. bituberculatum | (Kurt Förster & Eckert) G.J.P. Ramos & C.W.N. Moura in Ramos et al. | Notulae algarum | 146: 3 | 2020 |
| Fragilaria gloiophila | (Grunow) B. Van de Vijver, L. Ector, T.M. Schuster & J. Walter | Notulae algarum | 145: 2 | 2020 |
| Neogoniolithon siankanense | L.E. Mateo-Cid, A.C. Mendoza-González & P.W. Gabrielson in Mateo-Cid, Mendoza-González & Wynne | Notulae algarum | 147: 1, desc. and illus. in Mateo-Cid, Mendoza-González & Gabrielson, Phytotaxa 190(1): 82, figs. 53-60 (2014) | 2020 |