The amniotes are a group of tetrapod vertebrates that include the Synapsida (mammals and mammal-like reptiles) and Sauropsida (reptiles and dinosaurs, including birds).
The amniotes are a group of tetrapod vertebrates (mammals and mammal-like reptiles) and Sauropsida (reptiles). This is including birds. The amniotes are a group of tetrapod vertebrates (mammals and mammal-like reptiles) and Sauropsida (dinosaurs). This is including birds. These tetrapod vertebrates include the Synapsida.