Phascolonus was a large Australian marsupial in the wombat family. The largest species, Phascolonus gigas weighed as much as 200 kg and was one meter (3.28 ft) long.

Phascolonus existed alongside with an even larger marsupial, Diprotodon, which weighed as much as two tons and was distantly related to wombats. Both disappeared at the end of the Late Pleistocene in a Quaternary extinction event together with many other large Australian animals.

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