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Temporal range: Late Oligocene
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Marsupialia
Order: Diprotodontia
Family: Diprotodontidae
Genus: Ngapakaldia
R. A. Stirton, 1967
  • N. bonythoni Stirton, 1967
  • N. tedfordi Stirton, 1967
  • Bematherium Tedford, 1967[1]

Ngapakaldia is an extinct genus of diprotodontid marsupials, related to the modern koala and wombat. Around the size of a sheep, it was a ground-dwelling herbivore that lived around the vegetated shores of lakes in Central Australia during the Late Oligocene.

The genus was established in 1967 by R. A. Stirton when describing a fossil species Ngapakaldia tedfordi. The name refers to the source of the type material, Lake Ngapakaldi, located in Lake Ngapakaldi to Lake Palankarinna Fossil Area in the Tirari Desert of central Australia.[2]

Two species are placed with the genus, N. bonythoni and N. tedfordi.[3]


  1. ^ Black, K. H. (2010). "Ngapakaldia bonythoni (Marsupialia, Diprotodontidae): new material from Riversleigh, northwestern Queensland, and a reassessment of the genus Bematherium". Alcheringa: An Australasian Journal of Palaeontology. 34 (4): 471–492. doi:10.1080/03115511003793496.
  2. ^ John A. Long, Michael Archer (2002). Prehistoric Mammals of Australia and New Guinea: One Hundred Million Years of Evolution. UNSW Press. p. 89. ISBN 0868404357.
  3. ^ †Ngapakaldia Stirton 1967 (marsupial) at