| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Acratina | 1 | 0 | 0 |
| Clytomanningus molaris | 0 | 0 | 1 |
| Actinia Linnaeus 1767 | 1 | 0 | 0 |
| Actinia equina (Linnaeus 1758) (actinie rouge) | 0 | 0 | 1 |
| Actiniaria (Anémone de mer) | 3 | 0 | 0 |
| Actiniidae Rafinesque 1815 | 1 | 0 | 0 |
| Actinocyclus Ehrenberg 1837 | 1 | 0 | 0 |
| Actinocyclus ehrenbergii Ralfs 1861 | 0 | 0 | 1 |
| Actinopterygii (Actinoptérygiens) | 18 | 0 | 0 |
| Actinothoe Fischer 1889 | 1 | 0 | 0 |
| Sagartiogeton undatus (Müller 1778) | 0 | 0 | 1 |
| Actitis Illiger 1811 | 1 | 0 | 0 |
| Actitis hypoleucos (Linnaeus 1758) (Chevalier guignette) | 0 | 0 | 1 |
| Acuariidae Railliet, Henry & Sisoff 1912 | 1 | 0 | 0 |
| Adelosina d'Orbigny 1826 | 1 | 0 | 0 |
