(Petrolacosaurus,(Thalattosauria,(((Trilophosaurus,(Choristodera,Rhynchosauridae)),(Protorosaurus,Prolacerta),(Boreopricea,(Macrocnemus,(Langobardisaurus,(Cosesaurus,Longisquama,Sharovipteryx,(Preondactylus,Eudimorphodon)),(Tanystropheus,Tanytrachelos)))),(Proterosuchus,(Scleromochlus,Lagosuchus))),(Megalancosaurus,Drepanosaurus))));