| A (0 species) |
| B (1 species) |
| Bathygnathus - Early Permian, 270 Ma |
| C (2 species) |
| Ctenorhachis - Early Permian, Artinskian |
| Ctenospondylus - Early Permian Artinskian-Kungurian |
| D (1 species) |
| Dimetrodon - Cisuralian, 295-272 Ma |
| 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) |
| Macromerion - Late Carboniferous 304.2-299 Ma |
| N (0 species) |
| O (0 species) |
| P (0 species) |
| Q (0 species) |
| R (0 species) |
| S (2 species) |
| Secodontosaurus - Cisuralian, 285-272.3 Ma |
| Sphenacodon - Pennsylvanian to Cisuralian, 300-280 Ma |
| T (0 species) |
| U (0 species) |
| V (0 species) |
| W (0 species) |
| X (0 species) |
| Y (0 species) |
| Z (0 species) |