fossiles
| Nom | Type | Notoriété | Popularité |
|---|---|---|---|
| Arthrodire | Taxon | 24 | 2.8 |
| Asaphestera | Taxon | 8 | 0.2 |
| Ascidia | Taxon | 17 | 0.0 |
| Ascidiacea | Taxon | 55 | 26.8 |
| Ascidiella | Taxon | 9 | 0.0 |
| Ascidiidae | Taxon | 14 | 0.1 |
| Aspidella | Taxon | 14 | 0.7 |
| Aspidosaurus | Taxon | 8 | 0.4 |
| Asterosteus | Taxon | 4 | 0.0 |
| Astreptorhachis | Taxon | 4 | 0.0 |
| Astrocoenia | Taxon | 1 | 0.3 |
| Ateleaspis | Taxon | 5 | 0.1 |
| Atriolum | Taxon | 5 | 0.2 |
| Ausia | Taxon | 5 | 0.0 |
| Australerpeton | Taxon | 9 | 0.3 |
| Australobarbarus | Taxon | 10 | 0.1 |
| Australosyodon | Taxon | 8 | 0.1 |
| Austrobrachyops | Taxon | 1 | 0.0 |
| Axelrodichthys | Taxon | 8 | 0.3 |
| Axiothea | Taxon | 1 | 0.0 |
| Balanerpeton Woodi | Taxon | 6 | 0.1 |
| Balognathidae | Taxon | 3 | 0.0 |
| Baltoniodus | Taxon | 2 | 0.0 |
| Banffia | Taxon | 9 | 0.0 |
| Banksiops | Taxon | 4 | 0.0 |
| Bantamia | Taxon | 2 | 0.2 |
| Bantamia Gerthi | Taxon | 1 | 0.0 |
| Bashkirosaurus | Taxon | 5 | 0.1 |
| Bashkyroleter | Taxon | 4 | 0.0 |
| Bathochordaeus | Taxon | 8 | 0.2 |
| Bathochordaeus Charon | Taxon | 5 | 0.2 |
| Bathygnathus | Taxon | 9 | 0.0 |
| Batrachiderpeton | Taxon | 7 | 0.0 |
| Batrachomorpha | Taxon | 19 | 1.0 |
| Batrachosaurus | Taxon | 3 | 0.1 |
| Batrachosuchoides | Taxon | 3 | 0.0 |
| Batrachosuchus | Taxon | 9 | 0.2 |
| Batropetes | Taxon | 7 | 0.0 |
| Bauria | Taxon | 13 | 0.3 |
| Baurioidea | Taxon | 7 | 0.0 |
| Baurusuchidae | Taxon | 14 | 0.7 |
| Baurusuchus | Taxon | 15 | 0.7 |
| Belodina | Taxon | 1 | 0.0 |
| Belodus | Taxon | 1 | 0.0 |
| Belonochasma | Taxon | 5 | 0.0 |
| Benthosphenus | Taxon | 2 | 0.0 |
| Benthosuchus | Taxon | 11 | 0.1 |
| Beorn Leggi | Taxon | 9 | 0.7 |
| Bettongia Anhydra | Taxon | 9 | 0.0 |
| Biarmosuchia | Taxon | 22 | 1.5 |