The discovery of fossilised remains of an enormous prehistoric reptile in southern Poland has revealed that dinosaurs weren’t the only massive creatures roaming the planet 200 million years ago.
The fossil has been identified as a previously unknown variant of dicynodont, part of the therapsid group which are the ancestors of all modern mammals. The new species has been named Lisowicia bojani, after the German anatomist Ludwig Heinrich Bojanus and Lisowice, the village near the discovery site.
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Its enormous size - standing as tall as an African elephant and weighing up to nine tonnes – could alter our understanding of evolutionary history, as scientists have previously thought dinosaurs were the only animals to reach this size during the Triassic period. Other dicynodonts discovered in the past have been no larger than a cow.
“It’s natural to want to know how dicynodonts became so large. It blows holes in many of our classic ideas of Triassic ‘mammal-like reptiles’,” said Dr Grzegorz Niedzweidzi, part of a team from Sweden’s Uppsala University who assisted the excavation.
In addition to being the largest known non-dinosaur tetrapod, or four-legged animal, from the Triassic period, “Lisowicia is the youngest dicynodont” yet discovered, he added.
Most dicynodonts, along with other mammals, are thought to have retreated during an extinction period before the emergence of dinosaurs, and the Polish fossil is the first substantial find linking dicynodonts to the Late Triassic period in Europe.
Dr Tomasz Sulej of the Polish Academy of Sciences told The Independent that the new species was “a once-in-a-lifetime discovery”.
More than 1,000 prehistoric find have been made in and around Lisowice, which is thought to have been a river deposit during the Late Triassic period.
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