Nimbacinus dicksoni

Nimbacinus dicksoni is an extinct thylacinid marsupial, a close relative of the recent but extinct thylacinid known as the Tasmanian tiger. It lived approximately 23-16 million years ago in the Miocene period. Nimbacinus dicksoni was about 1.6 ft (50 cm) long. Being a predator, it likely ate birds, small mammals, and reptiles. Like the recently-extinct thylacine, it may have been an awkward runner and used stamina to catch prey rather than speed. Fossils have been found in Australia at Riversleigh in north-western Queensland and Bullock Creek in the Northern Territory.

Size comparison between Nimbacinus dicksoni (blue) and Thylacinus cynocephalus (orange)

Nimbacinus dicksoni
Temporal range: Miocene
~23–16 Ma
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Marsupialia
Order: Dasyuromorphia
Family: Thylacinidae
Genus: Nimbacinus
Species:
N. dicksoni
Binomial name
Nimbacinus dicksoni
Muirhead & Archer, 1990[1]

Like all thylacinids, Nimbacinus dicksoni was a dog-like marsupial, though its smaller size makes its appearance more comparable to that of a fox. Unlike its relatives, its jaws were likely strong enough for it to take down prey larger than itself.[2]

The known material consists of a nearly complete skeleton, missing only the feet and tail, though the holotype consists only of upper and lower jaws found in a different part of the same fossil site. In terms of completeness, it is the best-known thylacinid, excluding the thylacine.

References

  1. Muirhead, J.; Archer, M. (1990). "Nimbacinus dicksoni, a plesiomorphic thylacine (Marsupialia: Thylacinidae) from Tertiary deposits of Queensland and the Northern Territory". Memoirs of the Queensland Museum. 28: 203–221.
  2. Attard, Marie R. G.; Parr, William C. H.; Wilson, Laura A. B.; Archer, Michael; Hand, Suzanne J.; Rogers, Tracey L.; Wroe, Stephen (2014). "Virtual Reconstruction and Prey Size Preference in the Mid Cenozoic Thylacinid, Nimbacinus dicksoni (Thylacinidae, Marsupialia)". PLOS ONE. 9 (4): e93088. Bibcode:2014PLoSO...993088A. doi:10.1371/journal.pone.0093088. PMC 3981708. PMID 24718109.


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