fossiles
| Nom | Type | Notoriété | Popularité |
|---|---|---|---|
| Archegosauridae | Taxon | 15 | 0.1 |
| Archaeothyris | Taxon | 25 | 1.2 |
| Archaeosyodon | Taxon | 10 | 0.0 |
| Archaeocyatha | Taxon | 33 | 3.6 |
| Archaeaspinus Fedonkini | Taxon | 2 | 0.0 |
| Archaeaspinus | Taxon | 4 | 0.0 |
| Arcadia | Taxon | 5 | 0.1 |
| Arboroharamiya | Taxon | 7 | 0.1 |
| Arandaspis | Taxon | 22 | 2.4 |
| Arachana | Taxon | 5 | 0.2 |
| Appendicularia | Taxon | 45 | 0.9 |
| Appalachignathus | Taxon | 2 | 0.0 |
| Aplousobranchia | Taxon | 16 | 0.5 |
| Aplidium Punctum | Taxon | 7 | 0.2 |
| Aplidium Elegans | Taxon | 7 | 0.2 |
| Aplidium | Taxon | 10 | 0.9 |
| Aphaneramma | Taxon | 11 | 0.1 |
| Apateon | Taxon | 5 | 0.1 |
| Apachesaurus | Taxon | 7 | 0.0 |
| Antiarchi | Taxon | 19 | 0.8 |
| Anthracosaura | Taxon | 19 | 1.5 |
| Anteosaurus | Taxon | 21 | 1.9 |
| Anteosauroidea | Taxon | 11 | 0.1 |
| Anteosaurinae | Taxon | 4 | 0.3 |
| Anteosauridae | Taxon | 12 | 0.1 |
| Antarctosuchus | Taxon | 5 | 0.3 |
| Anomodontia | Taxon | 23 | 1.5 |
| Anomocephalus | Taxon | 11 | 0.1 |
| Anomocephaloidea | Taxon | 5 | 0.0 |
| Anomalocaris Saron | Taxon | 1 | 1.2 |
| Anomalocaris | Taxon | 40 | 19.7 |
| Anomalocarididae | Taxon | 16 | 2.1 |
| Annatherapsidus | Taxon | 9 | 0.0 |
| Animal Fossile | Taxon | 3 | 1.8 |
| Angusaurus | Taxon | 3 | 0.0 |
| Anglaspis | Taxon | 6 | 0.0 |
| Angelosaurus | Taxon | 10 | 0.0 |
| Andersonerpeton | Taxon | 4 | 0.0 |
| Ancyrognathus | Taxon | 2 | 0.0 |
| Ancyrodella | Taxon | 2 | 0.0 |
| Anconastes | Taxon | 4 | 0.0 |
| Anchignathodontidae | Taxon | 2 | 0.0 |
| Anatolepis | Taxon | 5 | 0.0 |
| Anaspida | Taxon | 26 | 2.0 |
| Anaschisma | Taxon | 9 | 0.0 |
| Anagalida | Taxon | 10 | 0.8 |
| Anagale | Taxon | 8 | 1.3 |
| Amphioxus | Taxon | 1 | 2.3 |
| Amphioxiformes | Taxon | 24 | 2.1 |
| Amphibien | Taxon | 176 | 232.9 |