Pristerodontia
Encyclopedia
Pristerodontia is a group of dicynodont
therapsids that includes cryptodontids
, geikiids
, lystrosaurids
, kannemeyeriids
, and other related forms. Pristerodontians were one of the few groups of dicynodonts to survive the Permian-Triassic extinction event
, diversifying in the Triassic
.
Dicynodont
Dicynodontia is a taxon of anomodont therapsids or mammal-like reptiles. Dicynodonts were small to large herbivorous animals with two tusks, hence their name, which means 'two dog tooth'...
therapsids that includes cryptodontids
Cryptodontidae
The family Cryptodontidae was a group of anomodonts from the Permian and Triassic time periods.-Permian:In the Permian time period cryptodontids lived in what is now India and South Africa.-Classification:...
, geikiids
Geikiidae
Geikiidae is a family of Late Permian dicynodonts. Fossils are known from Scotland, South Africa, and Tanzania. The family was first named by Franz Nopcsa in 1923, although Friedrich von Huene's 1948 description of the family brought it into common usage. Von Huene established Geikiidae as a...
, lystrosaurids
Lystrosauridae
Lystrosauridae was a family of Synapsids from the Permian and Triassic time periods.-Distribution:-Triassic Distribution:In the Triassic period, Lystrosaurids lived in Antarctica and China.-Relatives:...
, kannemeyeriids
Kannemeyeriidae
Kannemeyeriidae is a family of large, stocky, beaked and sometimes tusked dicynodonts. They were the dominant large terrestrial herbivores through most of the Triassic period...
, and other related forms. Pristerodontians were one of the few groups of dicynodonts to survive the Permian-Triassic extinction event
Permian-Triassic extinction event
The Permian–Triassic extinction event, informally known as the Great Dying, was an extinction event that occurred 252.28 Ma ago, forming the boundary between the Permian and Triassic geologic periods, as well as the Paleozoic and Mesozoic eras...
, diversifying in the Triassic
Triassic
The Triassic is a geologic period and system that extends from about 250 to 200 Mya . As the first period of the Mesozoic Era, the Triassic follows the Permian and is followed by the Jurassic. Both the start and end of the Triassic are marked by major extinction events...
.