 Several other mammals have been recorded from the late Cretaceous of Madagascar , mostly on the basis of isolated teeth . A possible second gondwanathere is represented by a tooth that is larger and lower @-@ crowned than those of Lavanify , and a yet lower @-@ crowned tooth may also be of a gondwanathere . A lower molar , UA 8699 , may be of a marsupial or a placental and a molar fragment is referable to Multituberculata . Finally , an as @-@ yet @-@ undescribed mammal is known from a fairly complete skeleton . None of these mammals is related to the living mammals of the island , many of which belong to unique groups ( see List of mammals of Madagascar ) . The fauna also contains crocodyliforms , dinosaurs , and other animals . 
