Permian Period, Cistecephalus Zone, Beaufort Series, Karoo Basin, Murrysburg District, South
Upper Eocene Period, Mt. Bolca, Near Verona, Italy, MCZ 5368
Upper Triassic, MCZ 1674
Middle oligocene Period, Lower Brule Formation, Converse County, Wyoming, MCZ 3667
first discovered skull of this genus, Permo-Carboniferous Period, Wichita Group, Aarcher Co., Texas,