| Congruentidium T.H. Abé, 1927 |
| Congruentidium compressum T.H. Abé, 1927 |
| Protoperidiniaceae J.P. Bujak & E.H. Davies, 1998 |
| Protoperidinium Bergh, 1882 |
| Protoperidinium abei (Paulsen) Balech, 1974 |
| Protoperidinium achromaticum (Levander) Balech, 1974 |
| Protoperidinium acutipes (P.A. Dang.) Balech, 1974 |
| Protoperidinium aequatoriale (Balech) Balech, 1974 |
| Protoperidinium americanum (Gran & Braarud) Balech, 1974 |
| Protoperidinium anguipes (Balech) Balech, 1974 |
| Protoperidinium anomaloplaxum (Balech) Balech, 1974 |
| Protoperidinium areolatum (Peters) Balech, 1974 |
| Protoperidinium asymmetricum Balech, 1974 |
| Protoperidinium avellana (Meunier) Balech, 1974 |
| Protoperidinium biconicum (P.A. Dang.) Balech, 1974 |
| Protoperidinium bipes (Paulsen) Balech, 1974 |
| Protoperidinium bispinum (J. Schill.) Balech, 1974 |
| Protoperidinium brevipes (Paulsen) Balech, 1974 |
| Protoperidinium brochii (Kof. & Swezy) Balech, 1974 |
| Protoperidinium capurroi (Balech) Balech, 1974 |