Amniotes include reptiles ( including dinosaurs and their descendants , birds ) and mammals .
Like amphibians , amniotes are air - breathing vertebrates , but they have complex eggs or embryos , including an amniotic membrane .
vertebrates include reptiles ( including dinosaurs and their descendants , birds ) and mammals .
Like amphibians , amniotes are air - breathing vertebrates , but they have complex eggs or embryos , including an amniotic membrane .