Table 2.
Age ranges of extinct genera sorted by NALMA (rows), and whether there is one species or two or more species per genus (columns) (data from SI Appendix, Table S1)
| One species recognized (n = 17) | Two+ species recognized (n = 21) | |
| Rancholabrean to the end of the Pleistocene (n = 6) | 1. Bootherium | 1. Cervalces |
| 2. Cuon | ||
| 3. Mixotoxodon | ||
| 4. Pampatherium | ||
| 5. Saiga | ||
| Irvingtonian to the end of the Pleistocene (n = 13) | 1. Brachyprotoma | 1. Camelops |
| 2. Cuvieronius | 2. Castoroides | |
| 3. Euceratherium | 3. Equus | |
| 4. Haringtonhippus | 4. Mammuthus | |
| 5. Mylohyus | 5. Nothrotheriops | |
| 6. Navahoceros | 6. Tetrameryx | |
| 7. Stockoceros | ||
| Blancan to the end of the Pleistocene (n = 19) | 1. Aztlanolagus | 1. Arctodus |
| 2. Hydrochoerus | 2. Capromeryx | |
| 3. Neochoerus | 3. Eremotherium | |
| 4. Paleolama | 4. Glyptotherium | |
| 5. Tremarctos | 5. Hemiauchenia | |
| 6. Holmesina | ||
| 7. Homotherium | ||
| 8. Mammut | ||
| 9. Megalonyx | ||
| 10. Miracinonyx | ||
| 11. Paramylodon | ||
| 12. Platygonus | ||
| 13. Smilodon | ||
| 14. Tapirus |