| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Abra Lamarck 1818 | 3 | 0 | 0 |
| Abra alba (W. Wood 1802) | 0 | 0 | 1 |
| Abra nitida (O. F. Müller 1776) | 0 | 0 | 1 |
| Abra profundorum (E. A. Smith 1885) | 0 | 0 | 1 |
| Abramis | 1 | 0 | 0 |
| Abramis brama (Linnaeus 1758) | 0 | 0 | 1 |
| Abyssoninoe Orensanz 1990 | 1 | 0 | 0 |
| Abyssoninoe scopa (Fauchald 1974) | 0 | 0 | 2 |
| Acanella Gray 1870 | 1 | 0 | 0 |
| Acanella arbuscula (Johnson 1862) | 0 | 0 | 1 |
| Acanthephyra | 2 | 0 | 0 |
| Acanthephyra pelagica | 0 | 0 | 1 |
| Acanthephyra purpurea | 0 | 0 | 1 |
| Acanthocardia Gray 1851 | 4 | 0 | 0 |
| Acanthocardia aculeata (Linnaeus 1758) | 0 | 0 | 1 |
