Taxa
16412 results
| > | Ardynomys silentii | Animalia | Species | |
| > | Arenahippus | Animalia | Genus | |
| > | Arenahippus aemulor | Animalia | Species | |
| > | Arenahippus grangeri | Animalia | Species | |
| > | Arenahippus pernix | Animalia | Species | |
| > | Arfia | Animalia | Genus | |
| > | Arfia junnei | Animalia | Species | |
| > | Arfia opisthotoma | Animalia | Species | |
| > | Arfia shoshoniensis | Animalia | Species | |
| > | Arfia zele | Animalia | Species | |
| > | Argyrolagidae | Animalia | Family | |
| > | Argyrolagus | Animalia | Genus | |
| > | Argyrolagus scaglai | Animalia | Species | |
| > | Argyromys | Animalia | Genus | |
| > | Argyromys aralensis | Animalia | Species | |
| > | Argyromys woodi | Animalia | Species | |
| > | Arikareeomys | Animalia | Genus | |
| > | Arikareeomys skinneri | Animalia | Species | |
| > | Arikarictis | Animalia | Genus | |
| > | Arikarictis chapini | Animalia | Species |