The Pristerognathus Assemblage Zone is a geological stratum and a faunal zone of the Beaufort Group, of the South African Karoo. The name refers to Pristerognathus, a genus of Therocephalian mammal-like reptile, whose fossils have been found in that structure. Image:Mantell's Iguanodon restoration.jpg This article is a . You can help My English Wiki by expanding it.