= segh, n.

An extinct mammal of the genus Thylacotherium, also called Amphitherium (see amphithere, n.), variously supposed to have been a marsupial or an…

An extinct artiodactyl ungulate mammal of the group including Anthracotherium (see anthracotherium, n.), found in Eurasia, Africa, and North…

= anchitherium, n.

Any of various primitive hoofed mammals of the early Tertiary, typically having a heavy body, massive limbs, and stumpy feet, constituting the…

A genus of fossil animals, remains of which are found in India.

Any of various rodent-like mammals of the extinct order Multituberculata, which were characterized by multituberculate molar teeth and constituted…

A member of a group of (actual or hypothetical) animals representing the evolutionary ancestors of mammals, or the most primitive form of mammal.

A member of the Tillodontia, a group of extinct mammals apparently combining the characters of ungulates, rodents, and carnivora, whose remains are…

A fossil of this genus (Cent. Dict. 1891).

Any mammal of the extinct genus Uintatherium, or (more generally) of the extinct order Dinocerata of mainly large, Asian and North American…

An extinct rhinoceros-like herbivorous mammal of the genus Arsinoitherium, distantly related to elephants, with a large horn on each side of the…

A fossil mammal of the order Symmetrodonta, known from remains found in North America and Europe.

A fossil reptile of the subclass Synapsida, showing a skull structure with some mammalian characteristics.