Kolopsis yperus was a mid-sized diprotodontid (subfamily Zygomaturinae). It is known only from the late Miocene fossil beds of Alcoota in the Northern Territory of Australia, where it appears in both the Ongeva Local Fauna and the Alcoota Local Fauna.
The scan below has been taken from a cast of the holotype.
Specimen number: NTM P9348
Skeletal element: Upper 3rd premolar and 1st molar
Significance of specimen: Cast of the holotype
Geological age: Miocene
Locality/site: Ongeva, Alcoota Station
State/territory: Northern Territory