distribution by the Early Jurassic. Most rhynchocephalians belong to the group Sphenodontia ('wedge-teeth'). Their closest living relatives are lizards and snakes...

This list of largest reptiles takes into consideration both body length and mass of large reptile species, including average ranges and maximum records...

Testudines, Squamata and Crocodilia. The only missing extant order is Sphenodontia, containing the tuataras, which are endemic to New Zealand. Australia...

Reptiles are tetrapod animals in the class Reptilia, comprising today's turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct...

reptilian orders. Squamates are a monophyletic group included, with the Sphenodontia (e.g. tuataras), in the Lepidosauria. The latter superorder, together...

Eilenodontinae are an extinct clade of reptiles belonging to Sphenodontia. They are either considered a subgroup of Opisthodontia, or Sphenodontidae. They...

of the Late Triassic Period. The Lepidosauromorpha, specifically the Sphenodontia, are first found in the fossil record of the earlier Carnian Age, though...

what taxonomists call a "wastebasket taxon". Williston proposed the Sphenodontia to include only tuatara and their closest fossil relatives in 1925. However...

The La Boca Formation is a geological formation in Tamaulipas state, northeast Mexico. It was originally thought to date back to the Early Jurassic, concretely...

the Late Triassic of Europe. It is the most primitive known member of Sphenodontia. Diphydontosaurus was one of the smallest sphenodontians, measuring up...