Source: LiveScience

Fossil of largest platypus ever is discovered in Australia

Laura Poppick LiveScience

5 hours ago

About the size of a child, the largest-known platypus roamed what is now Australia as far back as 15 million years ago, according to newfound fossil remains of the giant monotreme.

A team of paleontologists from the University of New South Wales in Australia identified the new species, called Obdurodon tharalkooschild, based on a single molar they discovered in the Riversleigh fossil field in northwestern Queensland, Australia. From measurements of the molar, the scientists have estimated the animal grew to be about 1 meter long (3.3 feet), which is twice the size of a modern platypus, and larger than the previously largest-known platypus ancestor, Obdurdon dicksoni.

Modern adult platypuses don't have teeth to compare the fossil to. But ancient platypuses, like O. dicksoni, did have teeth, and like many features of the platypus that set it apart from other mammals — such as its long bill, webbed feet and the fact that it lays eggs — platypus teeth are quite distinctive from all other mammal teeth, and are fairly easy to identify in the fossil record, study co-author Rebecca Pian, a graduate student at Columbia University, told LiveScience.

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Read more: http://www.nbcnews.com/science/fossi...lia-8C11527619