| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Acanthodoris Gray 1850 | 1 | 0 | 0 |
| Acanthodoris pilosa (Abildgaard) (doris épineux) | 0 | 0 | 1 |
| Acanthomysis Czerniavsky 1882 | 1 | 0 | 0 |
| Acanthomysis longicornis (Milne Edwards 1837) | 0 | 0 | 1 |
| Acarospora | 1 | 0 | 0 |
| Acarospora fuscata | 0 | 0 | 1 |
| Acarosporaceae | 1 | 0 | 0 |
| Acarosporales | 1 | 0 | 0 |
| Acartia Dana 1846 | 2 | 0 | 0 |
| Acartia (Acartiura) clausi Giesbrecht 1889 | 0 | 0 | 2 |
| Acartia (Acartiura) clausi Giesbrecht 1889 | 0 | 0 | 2 |
| Acartiidae Sars G. O. 1903 | 1 | 0 | 0 |
| Acasta Leach 1817 | 1 | 0 | 0 |
| Acasta spongites (Poli 1791) | 0 | 0 | 1 |
| Achelia | 2 | 0 | 0 |
