| A (5 species) |
| Ambulocetus - Early Eocene, 47.8-41.3 Ma |
| Ancalecetus - Late Eocene |
| Andrewsiphius - Eocene |
| Artiocetus - early Lutetian |
| Attockicetus - Eocene |
| B (2 species) |
| Babiacetus - Middle Eocene |
| Basilosaurus - Late Eocene |
| C (2 species) |
| Carolinacetus - Middle Eocene |
| Cynthiacetus - Late Eocene~37.2-33.9 Ma |
| D (1 species) |
| Dorudon - Late Eocene |
| E (1 species) |
| Eocetus - Middle Eocene |
| F (0 species) |
| G (3 species) |
| Gandakasia - Early Eocene, 49 Ma |
| Gaviacetus - Middle Eocene |
| Georgiacetus - Middle Eocene |
| H (1 species) |
| Himalayacetus - Early Eocene, 53.5 Ma |
| I (1 species) |
| Indocetus - Middle Eocene |
| J (0 species) |
| K (2 species) |
| Kharodacetus - Middle Eocene, 42 Ma |
| Kutchicetus - Middle Eocene, 46-43 Ma |
| L (0 species) |
| M (3 species) |
| Maiacetus - Middle Eocene |
| Makaracetus - Early Middle Eocene |
| Masracetus - Late Eocene |
| N (2 species) |
| Nalacetus - Early Eocene, 50 Ma |
| Natchitochia - Middle Eocene |
| O (0 species) |
| P (3 species) |
| Pakicetus - Early Eocene, 52-48 Ma |
| Pappocetus - Eocene |
| Protocetus - Middle Eocene |
| Q (1 species) |
| Qaisracetus - Middle Eocene |
| R (2 species) |
| Remingtonocetus - Middle Eocene, 45-43.5 Ma |
| Rodhocetus - Lutetian |
| S (2 species) |
| Saghacetus - Late Eocene |
| Stromerius - Late Eocene |
| T (2 species) |
| Takracetus - Middle Eocene |
| Togocetus - 46-44 Ma |
| U (0 species) |
| V (0 species) |
| W (0 species) |
| X (1 species) |
| Xenorophus - Oligocene |
| Y (0 species) |
| Z (1 species) |
| Zygorhiza - Late Eocene |