''Ramsayia'' is an extinct genus of giant

wombat Wombats are short-legged, muscular quadrupedal marsupials of the family Vombatidae that are native to Australia. Living species are about in length with small, stubby tails and weigh between . They are adaptable and habitat tolerant, and are ...

, weighing around 100 kg. ''Ramsayia'' is known from two species, ''Ramsayia lemleyi'' from the

Pliocene The Pliocene ( ; also Pleiocene) is the epoch (geology), epoch in the geologic time scale that extends from 5.33 to 2.58Late Pleistocene The Late Pleistocene is an unofficial Age (geology), age in the international geologic timescale in chronostratigraphy, also known as the Upper Pleistocene from a Stratigraphy, stratigraphic perspective. It is intended to be the fourth division ...

of Queensland and New South Wales. The skull superficially resembles that of the giant beavers ''

Castoroides ''Castoroides'' (from Latin ''castor'' (beaver) and -''oides'' (like)), or the giant beaver, is an extinct genus of enormous, bear-sized beavers that lived in North America during the Pleistocene. Two species are currently recognized, ''C. dilop ...

'' and ''

Trogontherium ''Trogontherium'' is an extinct genus of Eurasian giant beavers that lived from the Late Pliocene to the Late Pleistocene. Fossils of ''Trogontherium'' have been found across northern Eurasia, from Western Europe to China and Siberia. Taxonomy ...

.'' The large premaxillary spine suggests it possessed a large fleshy nose. The shape of the skull of ''R. magna'' suggests that it did not engage in burrowing. Cladistic analysis suggests that it is closely related to the other giant wombat genera ''

Phascolonus ''Phascolonus'' is an extinct genus of giant wombat known from the Pliocene and Pleistocene of Australia. There is only a single known species, ''Phascolonus gigas'', the largest wombat ever known to have existed, estimated to weigh as much as 20 ...

'' and ''

Sedophascolomys ''Sedophascolomys'' is an extinct genus of wombat known from the Pliocene and Pleistocene of Australia. There is a single recognised species, ''S. medius,'' which was formerly placed in the invalid genus ''Phascolomys.'' It was found in the north ...

.'' Like other giant wombats, its size is thought to have been adaption to feeding on large amounts of low quality vegetation. The only certain date of ''Ramsayia magna'' dates to the early Late Pleistocene, around 80,000 years ago, making the timing of its extinction uncertain.

''References''

Prehistoric vombatiforms Prehistoric marsupial genera {{paleo-marsupial-stub