Sauropsida ("lizard-face") is a group of amniotes that includes reptiles, dinosaurs, and birds. Among amniotes, sauropsida is distinguished from theropsida ("beast-face"), also called synapsids.==Taxonomy== Classification to order level, after Benton, 2004. Series Amniota Class Synapsida Order Pelycosauria* Order Therapsida Class Mammalia Class Sauropsida Subclass Anapsida Order Testudines (turtles) Subclass Diapsida Order Araeoscelidia Order Younginiformes Infraclass Ichthyosauria… (More on Sauropsida)