article: Synapsid
links: Cynodontia Reptile Upper Triassic Castorocauda Linnaean taxonomy Permian National Museum of Natural History Therocephalia Sauropsid Tachyglossus Holocene Permian–Triassic extinction event Dimetrodon Bird Therapsida Carboniferous Amniota Gorgonopsia Pelycosaur Henry Fairfield Osborn Mammal Adelobasileus Panthera tigris Amniote Pennsylvanian Therapsid Vertebrate Triassic