Giant Echidna Fossil Discovery Fills 1,000km Gap in Species' Distribution

A remarkable fossil discovery in Victoria, Australia, has revealed that giant echidnas once roamed the region. The Owen's giant echidna, Megalibgwilia owenii, lived during the Pleistocene epoch, which began 2.5 million years ago.

The fossil, discovered in the Buchan cave complex in East Gippsland, is a significant find, as it fills a 1,000km gap in the species' known distribution. Previously, specimens of the extinct monotreme had been found across Australia, from Western Australia to Tasmania, but mysteriously absent from the fossil record in Victoria.

The Owen's giant echidna was about twice the size of Australia's modern echidnas, growing up to 1 metre long and weighing up to 15kg. Its skeleton is much more robust than that of comparably sized animals, with deeper, more prominent muscle scars and larger attachments for ligaments, indicating it was using much greater force when interacting with the landscape.

According to Tim Ziegler, the collection manager of vertebrate palaeontology at the Museums Victoria Research Institute, the fossil was likely used for digging for buried larvae, larger prey of beetles, or bogong moths, or tearing tree bark to access food.

The research, published in Alcheringa: An Australasian Journal of Palaeontology, provides new insights into the distribution and habitat of the Owen's giant echidna during the ice age.