| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Abaristophora | 0 | 1 | 0 |
| Acanthophorides | 0 | 2 | 0 |
| Acontistoptera | 0 | 1 | 0 |
| Adelopteromyia | 0 | 2 | 0 |
| Adenophora | 0 | 1 | 0 |
| Agromyzidae | 0 | 1 | 0 |
| Allochaeta | 0 | 1 | 0 |
| Anevrina | 0 | 1 | 0 |
| Metazoa | 1 | 200 | 0 |
| Anisopodidae | 0 | 1 | 0 |
| Anthomyiidae | 0 | 1 | 0 |
| Apioceraectabilis | 0 | 1 | 0 |
| Apocephalus longistylus Brown 1993 | 0 | 1 | 0 |
| Apocephalus opimus Brown 2002 | 0 | 1 | 0 |
| Apodicrania molinai Borgmeier 1941 | 0 | 3 | 0 |
