Stereospondyli


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Noun1.Stereospondyli - formerly a suborder of Stegocephalia; amphibia having vertebrae whose component elements are fused into a single piece; "most vertebrates are stereospondylous"
animal order - the order of animals
Labyrinthodonta, Labyrinthodontia, superorder Labyrinthodonta, superorder Labyrinthodontia - extinct amphibians typically resembling heavy-bodied salamanders or crocodiles and having a solid flattened skull and conical teeth; Devonian through Triassic