How Many Species Are In The Reptile Order Rhynchocephalia?

How Many Species Are In The Reptile Order Rhynchocephalia? Living (non-avian) reptiles traditionally are classified in four orders: Squamata (lizards and snakes: with >10,000 species); Rhynchocephalia (the tuatara Sphenodon punctatus); Chelonia What animals are in the order rhynchocephalia? †Diphydontosaurus. †Homoeosaurus. †Lamarquesaurus. †Pamizinsaurus. †Sigmala. †Tingitana. †Vadasaurus. †Whitakersaurus. How many species are in the order Sphenodontia? Order