The cynodonts ("dog teeth"), in the clade Cynodontia, are therapsids that first appeared in the Late Permian (approximately 260 Ma). The group includes modern mammals (including humans) as well as their extinct ancestors and close relatives. Non-mammalian cynodonts spread throughout southern Gondwana and are represented by fossils from South America, Africa, India, and Antarctica. In the northern continents, fossils have been found in eastern North America as well as in Belgium and northwestern France. Cynodontia is one of the most diverse groups of therapsids. Non-mammalian cynodonts died out at some point during the Early Cretaceous.