Nototherium
| Nototherium Temporal range:  | |
|---|---|
| Fossil skull | |
| Life reconstruction of Nototherium mitcheli | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Mammalia | 
| Infraclass: | Marsupialia | 
| Order: | Diprotodontia | 
| Family: | †Diprotodontidae | 
| Genus: | †Nototherium Owen, 1845 | 
| Type species | |
| Nototherium inerme Owen, 1845 | |
| Species | |
| See text | |
Nototherium, from Ancient Greek νότος (nótos), meaning "south", and θηρίον (theríon), meaning "beast", is an extinct genus of diprotodontid marsupial from Australia and New Guinea. This marsupial had hypsodont molars and weighed around 500 kg. It was a relative of the larger Diprotodon and a distant kin to modern wombats.