| Hantzschia elongata (Hantzsch) Grunow, 1880 |
| Hantzschia marina (Donk.) Grunow, 1877 |
| Hantzschia spectabilis (Ehrenb.) Hust., 1959 |
| Hantzschia uruguayensis Metzeltin, Lange-Bert. & García-Rodríguez, 2003 |
| Hantzschia virgata (Roper) Grunow, 1880 |
| Hantzschia vivacior Lange-Bert., 1993 |
| Hantzschia vivax (W. Sm.) Tempère, 1908 |
| Neodenticula Akiba & Y. Yanagisawa, 1985 |
| Neodenticula seminae (Simonsen & Kanaya) Akiba & Y. Yanagisawa, 1985 |
| Nitzschia Hassall, 1845 |
| Nitzschia acicularis (Kütz.) W. Sm., 1853 |
| Nitzschia acicularis var. closteriodes Grunow, 1862 |
| Nitzschia acidoclinata Lange-Bert., 1976 |
| Nitzschia actinastroides (Lemmerm.) Goor, 1925 |
| Nitzschia actydrophila Hasle, 1965 |
| Nitzschia acula (Kütz.) Hantzsch, 1861 |
| Nitzschia acuta Cleve, 1878 |
| Nitzschia aequorea Hust., 1939 |
| Nitzschia agnita Hustedt, 1957 |
| Nitzschia alpina Hust., 1943 |