| Nitzschia commutata Grunow, 1880 |
| Nitzschia compressa (Bailey) Boyer, 1916 |
| Nitzschia confinis Hust., 1949 |
| Nitzschia constricta (Kütz.) Ralfs, 1861 |
| Nitzschia curvula W. Sm., 1856 |
| Nitzschia curvula var. subcapitata Rabenh., 1864 |
| Nitzschia cuspidata Hasle, 1965 |
| Nitzschia debilis (Arnott) Grunow, 1880 |
| Nitzschia delicatissima Cleve, 1897 |
| Nitzschia delicatula Hasle, 1965 |
| Nitzschia denticula Grunow, 1880 |
| Nitzschia dietrichii Hassall, 1845 |
| Nitzschia dissipata (Kütz.) Rabenh., 1860 |
| Nitzschia dissipata var. dissipata (Kütz.) Grunow, 1860 |
| Nitzschia dissipata var. genuina Mayer, 1913 |
| Nitzschia dissipata var. media (Hantzsch) Grunow, 1881 |
| Nitzschia distans W. Greg., 1857 |
| Nitzschia distans var. distans W. Greg., 1857 |
| Nitzschia distans var. tumescens Cleve & Möller |
| Nitzschia dubia W. Sm., 1853 |