Thylacoleo

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Thylacoleo

Prehistoric

Scientific classification

Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Infraclass:	Marsupialia
Order:	Diprotodontia
Family:	Thylacoleonidae
Genus:	Thylacoleo

Paleospecies

Thylacoleo hilli
Thylacoleo crassidentatus
Thylacoleo carnifex
Thylacoleo robustus
Thylacoleo australis
Thylacoleo oweni

Thylacoleo is an extinct genus of carnivorous marsupials that lived in Australia from the late Pliocene to the late Pleistocene (2 MYA to 30,000 years ago). These "marsupial lions" were the largest mammalian predators in Australia of that time, approaching the weight of a small lion.

There are many similarities between prehistoric Australian megafauna and some mythical creatures from the aboriginal dreamtime.

1 Description
2 Discoveries
3 Taxonomy
4 References
5 See also
6 External links

[edit] Description

Pound for pound, the Thylacoleo species had the strongest bite of any mammal species living or extinct; a 100 kg (220 lb) Thylacoleo had a bite comparable to that of a 250 kg (550 lb) African Lion^[1] and is thought to have hunted large animals such as diprotodonts and giant kangaroos. It also had extremely strong forelimbs, with retractable claws, a trait previously unseen in marsupials. Its strong forelimbs, retracting claws and incredibly powerful jaws mean that it may have been possible for a Thylacoleo to climb trees and perhaps to carry carcasses to keep the kill for itself (similar to the leopard today).

The Thylacoleo were 71 cm (28 in) at the shoulder and about 114 cm (45 in) long from head to tail. The T. carnifex species is the largest, and skulls indicate they averaged 101 to 130 kg (223 to 287 lb), and individuals reaching 124 to 160 kg (273 to 353 lb) were common^[2].

[edit] Discoveries

In 2007, a remarkably complete skeleton of T. carnifex was discovered in a limestone cave under Nullarbor Plain, where the animal fell to its death through a narrow opening in the plain above.^[3]

[edit] Taxonomy

Family: Thylacoleonidae (Marsupial lions)

Marsupial "lion" alludes to the superficial resemblance to the placental lion and its ecological niche as a large predator. Thylacoleo is not related to the modern lion Panthera leo.

Genus: Thylacoleo (Thylacopardus) - Australia's marsupial lions, that lived from about 2 million years ago, during the late Pliocene and became extinct about 30,000 years ago, during the late Pleistocene epoch.

Thylacoleo hilli (Oligocene, Pliocene)
Thylacoleo crassidentatus (Pliocene)
Thylacoleo carnifex (Pleistocene)
Thylacoleo robustus (Pleistocene)
Thylacoleo australis (Pleistocene)
Thylacoleo oweni (Pleistocene)

The family it belonged to, the Thylacoleonidae, had older early members like Priscileo and Wakaleo, dating back to the late Oligocene some 24 million years ago.^[4]

[edit] References

^ http://news.bbc.co.uk/2/hi/science/nature/4409039.stm
^ Wroe, S., Myers, T. J., Wells, R. T., and Gillespie, A. (1999). "Estimating the weight of the Plestocene marsupial lion, Thylacoleo carnifex (Thylacoleonidae : Marsupialia): implications for the ecomorphology of a marsupial super-predator and hypotheses of impoverishment of Australian marsupial carnivore faunas". Australian Journal of Zoology 47: 489–498.
^ BBC News, "Caverns give up huge fossil haul", 25 January 2007.
^ Long, J.A., Archer, M., Flannery, T. & Hand, S. (2002). Prehistoric Mammals of Australia and New Guinea - 100 million Years of Evolution. Baltimore: Johns Hopkins University Press, 224pp.