†Pareiasaurus Owen 1876 (reptile)
Alternative spelling: Pareiosaurus
Parent taxon: Pareiasauria according to M. S. Y. Lee 1997
Sister taxa: Arganaceras, Bradysaurus, Bunostegos, Elginia, Parasaurus, Pareiasauridae, Pareiasuchus, Propappus, Rhipaeosauridae, Shansisaurus, Shihtienfenia
Subtaxa: Pareiasaurus henneni, Pareiasaurus pinnatus, Pareiasaurus russouwi, Pareiasaurus serridens
Ecology: herbivore