| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Abeoforma | 0 | 0 | 1 |
| Acanthocorbis mongolica Paul 2012 | 0 | 0 | 2 |
| Acanthocystis pectinata Penard 1889 | 0 | 0 | 1 |
| Acanthocystis penardi Wailes 1925 | 0 | 0 | 1 |
| Acanthocystis saphonovi Mikrjukov 1994 | 0 | 0 | 1 |
| Acanthocystis turfacea | 0 | 0 | 1 |
| Acanthoecida | 0 | 0 | 2 |
| Acanthosolenia F. Bernard 1939 | 0 | 0 | 1 |
| Acanthosphaera Ehrenberg 1858 | 0 | 0 | 2 |
| Acineria uncinata Tucolesco 1962 | 0 | 0 | 1 |
| Acrasidae | 0 | 0 | 1 |
| Acropisthium mutabile Perty 1852 | 0 | 0 | 1 |
| Actidesmium Reinsch 1875 | 0 | 0 | 1 |
| Actinastrum Lagerheim 1882 | 0 | 0 | 1 |
| Actinolophus minutus Walton 1905 | 0 | 0 | 1 |
