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Science 12 Jan 2018 Fossil of dinosaur s ...

Fossil of dinosaur swept away in ancient Australian river found

Published Jan 12, 2018, 10:24 am IST
Updated Jan 12, 2018, 10:24 am IST
Diluvicursor’s remains were found amongst a jumbled collection of large fossilised tree trunks, also swept down the river during a flood.
Diluvicursor was about 7-1/2-feet (2.3 meters) long.
 Diluvicursor was about 7-1/2-feet (2.3 meters) long.

In sandstone next to the high tide mark at the edge of the Bass Strait in southeastern Australia, scientists have unearthed fossils of a two-legged, turkey-sized, plant-eating dinosaur apparently swept away in a large, powerful ancient river.

Paleontologists on Thursday said the partial skeleton of the previously unknown beastie, named Diluvicursor Pickering, that lived about 113 million years ago provides insight into the array of dinosaurs that inhabited Australia during the Cretaceous Period when it was still connected to Antarctica.


 “Skeletons of dinosaurs from Australia are very rare,” said University of Queensland palaeontologist Matthew Herne, noting that Diluvicursor brings to only 19 the number of Australian dinosaurs that have been named to date.

Diluvicursor’s remains were found amongst a jumbled collection of large fossilised tree trunks also apparently swept down the river during a flood. The site is on the south coast of the state of Victoria, about 105 miles (170 km) from Melbourne.

Diluvicursor was about 7-1/2-feet (2.3 meters) long. Herne said it was “comparable to a large domesticated turkey in weight, but of course much longer than a turkey because of its tail.” The fossils included an almost complete tail, the lower part of the right leg and most of the right foot.


It lived alongside meat-eating dinosaurs about 20 feet (6 meters) long, as well as armoured dinosaurs, turtles, shrew-sized mammals and flying reptiles called pterosaurs. Herne said Diluvicursor, a member of a dinosaur group called ornithopods, was similar to another small, two-legged herbivorous dinosaur called Leaellynasaura that lived at about the same time and whose remains were unearthed about 9 miles (15 km) away.

The two may have occupied different ecological niches and eaten different plants. Leaellynasaura was more lightly built, had a long tail and may have been a more agile runner.


“An analogy can be seen in the kind of diversity seen in the kangaroos and wallabies in present-day Australia who occupy very different niches, from open plains to dense forest habitats,” Herne said. Diluvicursor roamed a forested broad rift valley floodplain between Australia and Antarctica, which remained connected until about 45 million years ago.

“The jury’s out on the climate,” Herne said. “Some believe that the climate was cold with winter ice, while others suggest the climate was warmer or more temperate.” Its genus name, Diluvicursor, means “flood runner.” Its species name, Pickering, honours the late palaeontologist David Pickering.


The research was published in the scientific journal PeerJ.

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