What is "nototherium"

Nototherium \No`to*the"ri*um\, n. [NL., fr. Gr. no`tos the south + qhri`on a wild animal.] (Zo["o]l.) An extinct genus of gigantic herbivorous marsupials, found in the Pliocene formation of Australia.

Nototherium ("Southern Beast") is an extinct genus of marsupial from Australia. This mammal had hypsodont molars. It was a relative of the larger Diprotodon and a distant kin to modern wombats too. It was hunted by Megalania and Thylacoleo carnifex.