article: Amniote
links: Synapsid Theriodont Synapsida Earth Eureptilia Paleothyris Class (biology) Sauropsid Protoclepsydrops Sauropsida Tetrapod Taxonomy Anapsida Diapsida Pelycosaur Mississippian Amphibia Casineria Mammal Sarcopterygii Amniote Tetrapoda Pennsylvanian Egg (biology) Carboniferous Ernst Haeckel