| A (1 species) |
| Ancalecetus - Late Eocene |
| B (2 species) |
| Basilosaurus - Late Eocene |
| Basiloterus - Late Eocene |
| C (2 species) |
| Chrysocetus - Eocene |
| Cynthiacetus - Late Eocene~37.2-33.9 Ma |
| D (1 species) |
| Dorudon - Late Eocene |
| E (0 species) |
| F (0 species) |
| G (0 species) |
| H (0 species) |
| I (0 species) |
| J (0 species) |
| K (0 species) |
| L (0 species) |
| M (1 species) |
| Masracetus - Late Eocene |
| N (0 species) |
| O (0 species) |
| P (0 species) |
| Q (0 species) |
| R (0 species) |
| S (2 species) |
| Saghacetus - Late Eocene |
| Stromerius - Late Eocene |
| T (0 species) |
| U (0 species) |
| V (0 species) |
| W (0 species) |
| X (0 species) |
| Y (0 species) |
| Z (1 species) |
| Zygorhiza - Late Eocene |