Priosphenodon

Priosphenodon is an extinct, large herbivorous eilenodontine rhynchocephalian known from the mid-Cretaceous (Albian-Turonian) of Argentina. It is one of the largest known sphenodontians.

== Taxonomy == The type species of Priosphenodon, P. avelasi, was described in 2003 from the Late Cretaceous (Cenomanian-Turonian) aged Candeleros Formation of Argentina. In 2014, a second smaller species, P. minimus was described from the same formation, though from an earlier unit suggested to be Early Cretaceous (Albian) in age. Other authors have disputed the use of the genus Priosphenodon, with some authors treating P. avelasi and P. minimus as members of the previously named genus Kaikaifilusaurus instead.