An Australian-U.S. team of paleontologists has found a unique fossil of a huge, carnivorous platypus that lived in what is now Australia during the late Miocene.
This is an artist’s reconstruction of Obdurodon tharalkooschild. The inset shows its first lower molar. Image credit: Peter Schouten.
The
modern platypus is a duck-billed, venomous, semi-aquatic mammal with
webbed feet and is covered in short waterproof fur. It is one of the
five extant species of monotremes, the only mammals that lay eggs
instead of giving birth.The new extinct species of platypus, named Obdurodon tharalkooschild, has been described from a unique tooth fossil found at the famous Riversleigh World Heritage Area of Queensland.
The specific name, tharalkooschild, honors an Indigenous Australian creation story about the origin of the platypus.
Unlike the living species, Obdurodon tharalkooschild had fully functional teeth that may have been used to kill and consume a wide range of animals that lived alongside it in ancient pools and lakes. Based on the size of its tooth, it is estimated that Obdurodon tharalkooschild would have been twice the size of the modern platypus, around 3.3 feet (1 m) long.
“Like other platypuses, it was probably a mostly aquatic mammal, and would have lived in and around the freshwater pools in the forests that covered the Riversleigh area millions of years ago,” explained Prof Suzanne Hand from the University of New South Wales, a co-author of the article published in the Journal of Vertebrate Palaeontology.
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