| Navicula yarrensis Grunow, 1876 |
| Navicula zanardiniana Grunow, 1860 |
| Navicula zeta Cleve, 1895 |
| Navicula zostereti Grunow, 1860 |
| Naviculaceae Kütz., 1844 |
| Naviculadicta Lange-Bert., 1994 |
| Naviculadicta brasiliana (A. Cleve) Metzeltin & Lange-Bert., 1998 |
| Seminavis D.G. Mann, 1990 |
| Seminavis cymbelloides (Grunow) D.G. Mann, 1990 |
| Seminavis strigosa Danieledis & Economou-Amilli, 2003 |
| Trachyneis Cleve, 1894 |
| Trachyneis antillarum (Cleve & Grunow) Cleve, 1894 |
| Trachyneis aspera (Ehrenb.) Cleve, 1894 |
| Trachyneis aspera var. aspera (Ehrenb.) Cleve, 1894 |
| Trachyneis aspera var. elliptica Hendey, 1964 |
| Trachyneis aspera var. intermedia (Grunow) Cleve, 1894 |
| Trachyneis clepsydra (Donk.) Cleve, 1894 |
| Trachyneis velata (A. Schmidt) Cleve, 1894 |