| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Abra Lamarck 1818 | 2 | 0 | 0 |
| Abra nitida (O. F. Müller 1776) | 0 | 0 | 1 |
| Abra prismatica (Montagu 1808) | 0 | 0 | 1 |
| Abrothallus | 1 | 0 | 0 |
| Abrothallus parmeliarum (Sommerf.) Nyl. 1869 | 0 | 0 | 1 |
| Acanthis Borkhausen 1797 | 1 | 0 | 0 |
| Acanthis flammea (Linnaeus 1758) (Sizerin flammé) | 0 | 0 | 1 |
| Acanthocardia Gray 1851 | 1 | 0 | 0 |
| Acanthocardia echinata (Linnaeus 1758) (Acanthocardia echinata) | 0 | 0 | 1 |
| Acanthotrochus Danielssen & Koren 1881 | 1 | 0 | 0 |
| Acanthotrochus mirabilis Danielssen & Koren 1881 | 0 | 0 | 1 |
| Achillea (Achillee) | 2 | 0 | 0 |
| Achillea millefolium L. (Achillée Millefeuille) | 0 | 0 | 1 |
| Achillea ptarmica L. (Achillée sternutatoire) | 0 | 0 | 0 |
| Acinetosporaceae | 3 | 0 | 0 |
