| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Acanthus ilicifolius L. | 0 | 0 | 1 |
| Acar Gray 1857 | 2 | 0 | 0 |
| Acar botanica (Hedley 1917) | 0 | 0 | 1 |
| Acar dubia (Baird 1873) | 0 | 0 | 1 |
| Acar plicata (Dillwyn 1817) | 0 | 0 | 1 |
| Acar sandersonae Powell 1933 | 0 | 0 | 1 |
| Acar sociella (Brookes 1926) | 0 | 0 | 1 |
| Acar squamosa (Lamarck 1819) | 0 | 0 | 1 |
| Acarnidae Dendy 1922 | 1 | 0 | 0 |
| Acartia Dana 1846 | 1 | 0 | 0 |
| Acartia (Acartiura) tranteri Bradford 1976 | 0 | 0 | 1 |
| Acartiidae Sars G. O. 1903 | 1 | 0 | 0 |
| Acasta Leach 1817 | 2 | 0 | 0 |
| Acasta cyathus Darwin 1854 | 0 | 0 | 1 |
| Acasta sulcata | 0 | 0 | 1 |
