EditorialMastodonsaurus, extinct genus of giant large-headed temnospondyl amphibians of the Triassic, and Pareiasaurus, extinct genus of anapsid reptile from the Permian.
EditorialMastodonsaurus, extinct genus of giant large-headed temnospondyl amphibians of the Triassic, and Pareiasaurus, extinct genus of anapsid reptile from the Permian.