| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Abietinella | 1 | 0 | 0 |
| Abietinella abietina Fleischer 1923 | 0 | 0 | 1 |
| Acanthis Borkhausen 1797 | 2 | 0 | 0 |
| Acanthis flammea (Linnaeus 1758) (Sizerin flammé) | 0 | 0 | 1 |
| Acanthis hornemanni (Holböll 1843) (Sizerin blanchâtre) | 0 | 0 | 1 |
| Acanthobothrium | 2 | 0 | 0 |
| Acanthobothrium crassicollis | 0 | 0 | 1 |
| Acanthobothrium rajaebatis (Rudolphi 1810) Euzet 1959 | 0 | 0 | 1 |
| Acanthocardia Gray 1851 | 1 | 0 | 0 |
| Acanthocardia echinatum | 0 | 0 | 0 |
| Acanthocirrus | 1 | 0 | 0 |
| Acanthocirrus retirostris | 0 | 0 | 1 |
| Acarospora | 8 | 0 | 0 |
| Acarospora badiofusca (Nyl.) Th. Fr. | 0 | 0 | 1 |
| Acarospora fuscata | 0 | 0 | 1 |
