Temporal range: Oligocene–Miocene
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Marsupialia
Order: Diprotodontia
Suborder: Vombatiformes
Family: Ilariidae
Tedford & Woodburne, 1987


The Ilariidae are a family of four genera with more than six species of extinct koala-like marsupials. They are all found in the middle Tertiary assemblage of South Australia but the genus, Nimbadon is found in Riversleigh, and are closely related to the family Phascolarctidae, which was found in Hamilton, Victoria. I. illumidens is the best-preserved representative of this extinct clade of vombatiforms. The species is found in the Namba Formation of late Oligocene age, Lake Pinpa, South Australia. The material consists of a partial cranium and mandibular fragments with most of the dentition, together with parts of the postcranial skeleton.[1] The other species in this family are known from a few jaw fragments and intact molars attached; they are categorised in a separate family because their teeth structure is unique among Diprotodontia, in having a complicated folding pattern. Ilariids are thought to be the largest marsupials of their time in the Lake Eyre and Tarkarooloo basin, and lived along with Wynyardiidae, Obdurodon, and thylacoleonids (marsupial lions) such as Priscileo and Wakaleo.


  • Patricia Vickers-Rich and Thomas Hewett Rich 1993 Wildlife of Gondwana Reed Books, Chatswood, New South Wales ISBN 0-7301-0315-3 Reed.
  1. ^ accessed 2010-05-21


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Mammal Diversity 2011 This article is part of Project Mammal Taxonomy, a All Birds project that aims to write comprehensive articles on every order, family and other taxonomic rank related to mammals.
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