A large therian mammal from the Late Cretaceous of South America
Abstract Theria represent an extant clade that comprises placental and marsupial mammals.Here we report on trailmaster challenger 200x the discovery of a new Late Cretaceous mammal from southern Patagonia, Patagomaia chainko gen.et sp.nov., represented by hindlimb and pelvic elements with unambiguous therian features.We estimate Patagomaia chainko