The Saint Bathans mammal is a currently unnamed extinct primitive mammal from the Early Miocene (Altonian, 18.7 Ma to 15.9 Ma) of New Zealand. A member of the Saint Bathans fauna, it is notable for being a late-surviving "archaic" mammal species, neither a placental nor a marsupial. It also provides evidence that flightless fully terrestrial mammals did in fact once live in Zealandia. This is in contrast to modern New Zealand, where bats, cetaceans and seals are the only non-introduced mammals in the otherwise bird-dominated faunas.[1]