| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Aletopelta coombsi Ford & Kirkland 2001 | 0 | 0 | 2 |
| Allosaurus Marsh 1877 | 1 | 0 | 3 |
| Allosaurus fragilis (Marsh 1877) | 0 | 0 | 10 |
| Alvarezsaurus Bonaparte 1991 | 1 | 0 | 0 |
| Alvarezsaurus calvoi Bonaparte 1991 | 0 | 0 | 2 |
| Alxasaurus Russell & Dong 1994 | 1 | 0 | 0 |
| Alxasaurus elesitaiensis Russell & Dong 1994 | 0 | 0 | 7 |
| Amargasaurus Bonaparte 1984 | 1 | 0 | 0 |
| Amargasaurus cazaui Salgado & Bonaparte 1991 | 0 | 0 | 9 |
| Ammosaurus | 1 | 0 | 0 |
| Ammosaurus major | 0 | 0 | 5 |
| Ampelosaurus Le Loeuff 1995 | 1 | 0 | 0 |
| Ampelosaurus atacis Le Loeuff 1995 | 0 | 0 | 5 |
| Amphicoelias Cope 1877 | 1 | 0 | 0 |
| Amphicoelias altus Cope 1877 | 0 | 0 | 5 |
