mammifères
| Nom | Type | Notoriété | Popularité |
|---|---|---|---|
| Amphicyoninae | Taxon | 8 | 0.1 |
| Amphilestes | Taxon | 10 | 0.0 |
| Amphilestes Broderipii | Taxon | 7 | 0.0 |
| Amphitragulus | Taxon | 5 | 0.2 |
| Amynodontidae | Taxon | 19 | 2.1 |
| Anachlysictis | Taxon | 10 | 0.1 |
| Ancylotherium | Taxon | 18 | 2.9 |
| Andrewsarchus | Taxon | 30 | 11.8 |
| Anebodon | Taxon | 3 | 0.1 |
| Anglo-français | Concept | 9 | 9.3 |
| Angora | Concept | 38 | 18.4 |
| Anisodon | Taxon | 12 | 0.0 |
| Anoplotheriidae | Taxon | 10 | 0.4 |
| Anoplotherium | Taxon | 12 | 0.6 |
| Anourosorex | Taxon | 21 | 1.0 |
| Anourosorex Squamipes | Taxon | 22 | 0.3 |
| Antarctodon | Taxon | 6 | 0.2 |
| Anthracotheriidae | Taxon | 27 | 1.5 |
| Anthracotherium | Taxon | 19 | 3.2 |
| Antilocapra | Taxon | 10 | 0.3 |
| Antilocapra Americana | Taxon | 63 | 23.3 |
| Antilocapra Pacifica | Taxon | 5 | 0.0 |
| Antilocapridae | Taxon | 37 | 6.2 |
| Antilopes | Concept | 94 | 106.9 |
| Apatemys | Taxon | 6 | 0.6 |
| Apterodon | Taxon | 8 | 0.0 |
| Apterodontinae | Taxon | 5 | 0.0 |
| Apure | Objet | 5 | 0.5 |
| Archaeohyracidae | Taxon | 8 | 0.3 |
| Archaeopithecidae | Taxon | 9 | 0.7 |
| Archaeotherium | Taxon | 23 | 3.0 |
| Archonta | Taxon | 14 | 2.2 |
| Arcott Canadien | Concept | 5 | 0.5 |
| Arctictis Binturong Whitei | Taxon | 7 | 0.0 |
| Arctocephalinae | Taxon | 42 | 7.2 |
| Arctocephalus | Taxon | 35 | 5.5 |
| Arctocephalus Galapagoensis | Taxon | 38 | 1.3 |
| Arctocephalus Philippii | Taxon | 37 | 1.3 |
| Arctocyon | Taxon | 15 | 2.2 |
| Arctogalidia Trivirgata | Taxon | 39 | 1.1 |
| Arctoidea | Taxon | 24 | 2.5 |
| Ardennais Roux | Concept | 2 | 4.8 |
| Ardes | Concept | 2 | 2.1 |
| Argos | Concept | 1 | 0.1 |
| Arsinoitheriidae | Taxon | 15 | 0.6 |
| Arsinoitherium | Taxon | 30 | 3.4 |
| Artiodactyla | Taxon | 116 | 60.7 |
| Arturo | Objet | 6 | 0.4 |
| Arunachali | Concept | 1 | 0.1 |
| Ashera | Objet | 7 | 24.3 |