- Stereospondyli, order Stereospondyli - formerly a suborder of Stegocephalia; amphibia having vertebrae whose component elements are fused into a single piece; "most vertebrates are stereospondylous"
--1 is a kind of animal order
--1 is a member ofLabyrinthodontia, superorder Labyrinthodontia, Labyrinthodonta, superorder Labyrinthodonta