| Nitzschia valens (Ehrenb.) Ralfs, 1861 |
| Nitzschia valida Cleve & Grunow, 1878 |
| Nitzschia vermicularis (Kütz.) Hantzsch, 1859 |
| Nitzschia vexans Grunow, 1881 |
| Nitzschia vidovichii (Grunow) Grunow, 1881 |
| Nitzschia vildaryana Rumrich & Lange-Bert., 2000 |
| Nitzschia villarealli G. Fryxell, 2000 |
| Nitzschia visurgis Hust., 1957 |
| Nitzschia vitrea G. Norman, 1861 |
| Nitzschia vitrea var. salinarum Grunow, 1880 |
| Nitzschia weissflogii Grunow, 1878 |
| Nitzschia wuellerstorffii Lange-Bert., 1987 |
| Nitzschia yalahau E. Novelo, R. Tavera & C. Ibarra, 2007 |
| Psammodictyon D.G. Mann, 1990 |
| Psammodictyon constrictum (W. Greg.) D.G. Mann, 1990 |
| Psammodictyon mediterraneum (Hust.) D.G. Mann, 1990 |
| Psammodictyon panduriforme (W. Greg.) D.G. Mann, 1990 |
| Psammodictyon panduriforme var. continua Grunow |
| Psammodictyon panduriforme var. delicatulum (Grunow) M. Poulin, 1991 |
| Psammodictyon panduriforme var. minor (W. Greg.) E.Y. Haworth & M.G. Kelly |