Synapsids, also regarded as "mammal-like reptiles" or "stem-mammals", are noted in ARK: Survival Evolved as the transitionary group between reptiles and mammals. They are creatures that are not quite reptiles but they are not quite mammals either.
List of Synapsids
| Name | Mod | Diet | Temperament | Tamable | Rideable | Saddle Level |
|---|---|---|---|---|---|---|
| Anteosaurus | AC2 | Carnivore | Aggressive | Yes | Yes | 70 |
| Elephantosaurus | AC2 | Herbivore | Docile | Yes | Yes | 16 |
