Alkwertatherium webbi is an extinct diprotodontid belonging to the subfamily Zygomaturinae. It is the sole member of the genus Alkwertatherium. The species is known only from the 8-million-year-old late Miocene Alcoota Local Fauna from the Northern Territory of Australia.
Skeletal element: Cranium
Specimen number: NTM P5442
Geological age: Miocene
State/territory: Northern Territory
Locality: Alcoota
Skeletal element: Mandible
Specimen number: NTM P4446
Geological age: Miocene
State/territory: Northern Territory
Locality: Alcoota
Murray, P. (1990). Alkwertatherium webbi, a new zygomaturine genus and species from the late Miocene Alcoota Local Fauna, Northern Territory (Marsupialia: Diprotodontidae). Beagle: Records of the Museums and Art Galleries of the Northern Territory, 7(2), 53–80.