Planocephalosaurus

Taxobox
name = "Planocephalosaurus"
fossil_range = Late Triassic
regnum = Animalia
phylum = Chordata
classis = Sauropsida
ordo = Sphenodontia
familia = Sphenodontidae
genus = "Planocephalosaurus"

"Planocephalosaurus" is an extinct genus of diapsid reptile belonging to the Order Sphenodontia. It was about 20 cm (8 in) long.

"Planocephalosaurus" was one of the first sphenodonts and bore a strong resemblance to the extant tuatara. The main difference was that "Planocephalosaurus"'s teeth were fused with the cartilage, unlike the tuatara's. The creature is presumed to have fed on large invertebrates and small vertebrates.