| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Anomalobittacus | 0 | 0 | 1 |
| Aoraia senex Hudson 1908 | 0 | 0 | 1 |
| Aphididae (aphids) | 0 | 0 | 2 |
| Apocheima | 0 | 0 | 1 |
| Apterobittacus | 0 | 0 | 1 |
| Apterocorypha | 0 | 0 | 1 |
| Apteromantis | 0 | 0 | 1 |
| Apteromutilla Ashmead 1903 | 0 | 0 | 2 |
| Apteropanorpa | 0 | 0 | 2 |
| Apterothrips | 0 | 0 | 1 |
| Apteryoperla | 0 | 0 | 1 |
| Aptinothrips | 0 | 0 | 1 |
| Archaeognatha (jumping bristletails) | 0 | 0 | 1 |
| Archinycteribia | 0 | 0 | 1 |
| Archotermopsidae (rottenwood termites) | 0 | 0 | 1 |
