| Pseudo-nitzschia pacifica (Cupp) Hasle, 1965 |
| Pseudo-nitzschia prolongatoides (Hasle) Hasle, 1993 |
| Pseudo-nitzschia pseudodelicatissima (Hasle) Hasle, 1993 |
| Pseudo-nitzschia pungens (Grunow ex Cleve) Hasle, 1993 |
| Pseudo-nitzschia pungens var. atlantica (Cleve) Moreno |
| Pseudo-nitzschia pungens var. pungens (Grunow ex Cleve) Hasle, 1993 |
| Pseudo-nitzschia roundii Hern.-Becerr., 2006 |
| Pseudo-nitzschia seriata (Cleve) H. Perag., 1899 |
| Pseudo-nitzschia subfraudulenta (Hasle) Hasle, 1993 |
| Pseudo-nitzschia subpacifica (Hasle) Hasle, 1993 |
| Pseudo-nitzschia ustulatus (Turner) Kütz., 1843 |
| Tryblionella W. Sm., 1853 |
| Tryblionella acuminata W. Sm., 1853 |
| Tryblionella acuta (Cleve) D.G. Mann, 1990 |
| Tryblionella apiculata W. Greg., 1857 |
| Tryblionella brightwellii (Kitton) D.G. Mann, 1990 |
| Tryblionella calida (Grunow) D.G. Mann, 1990 |
| Tryblionella campechiana (Grunow) D.G. Mann, 1990 |
| Tryblionella compressa (Bailey) Poulin, 1991 |
| Tryblionella constricta W. Greg., 1855 |