Sphenacodontoidea

Sphenacodontoids Temporal range: Late Carboniferous-Recent, 300–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Fossilized skull of two sphenacodontoids : Clelandina (Therapsida, Gorgonopsidae) and a Dimetrodon (Sphenacodontidae).
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Clade:	Sphenacomorpha
Clade:	Sphenacodontia
Clade:	Pantherapsida
Clade:	Sphenacodontoidea
Clades
†Shashajaia †Sphenacodontidae Therapsida

Sphenacodontoidea is Superfamily of the Pelycosaurs. Which Includes Sphenacodontids and Edaphosaurids.