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A “high-greeted” dinosaur who went on his tiptoes

An artist's impression of the Rhoetosaurus brownei, (c) Queensland Museum 201 4. Credit: Konstantinov, Atuchin & Hocknull. Credit: University of Queensland A 24-ton dinosaur may have gone into a "high-greeting" fashion, according to the University of Queensland survey. UQ Ph.D. candidate Andréas Jannel and colleagues from UQ's Dinosaur Lab analyzed fossils from Australia's only named Jurassic sauropod, Rhoetosaurus brownei to better understand how such a huge creature could support its own body weight. "Looking at the legs of the foot it was clear that Rhoetosaurus went with an elevated heel and asked the question: how could the foot support the huge mass of this animal up to 40 tons? Mr. Jannel said. ] "Our research suggests that although Rhoetosaurus stood on their tiptoes, the heel was the pillow of fleshy pillow." "We see a similar thing in elephant feet, but this dinosaur was at least five times so heavy as an elephant, so the forces involved are much larger. " Jannel and his colleagues arrived at this conclusion by creating a replica of the fossils and then physically manipulating it in an attempt to understand the movement between the legs. " We also used 3-D modeling techniques to assess different foot positions as would have made it possible for rhoetosaurus to support their weight, "he said. Right hind foot of the fossil sample of the Rhoetosaurus brownei (QM F1659), in dorsal view. lacks the fifth. Credit: Jay P. Nair & Andrew Jannel. "Finally, we looked at a series of sauropod…

An artist’s impression of the Rhoetosaurus brownei, (c) Queensland Museum 201

4. Credit: Konstantinov, Atuchin & Hocknull. Credit: University of Queensland

A 24-ton dinosaur may have gone into a “high-greeting” fashion, according to the University of Queensland survey.

UQ Ph.D. candidate Andréas Jannel and colleagues from UQ’s Dinosaur Lab analyzed fossils from Australia’s only named Jurassic sauropod, Rhoetosaurus brownei to better understand how such a huge creature could support its own body weight.

“Looking at the legs of the foot it was clear that Rhoetosaurus went with an elevated heel and asked the question: how could the foot support the huge mass of this animal up to 40 tons? Mr. Jannel said.

] “Our research suggests that although Rhoetosaurus stood on their tiptoes, the heel was the pillow of fleshy pillow.”

“We see a similar thing in elephant feet, but this dinosaur was at least five times so heavy as an elephant, so the forces involved are much larger. “

Jannel and his colleagues arrived at this conclusion by creating a replica of the fossils and then physically manipulating it in an attempt to understand the movement between the legs.

” We also used 3-D modeling techniques to assess different foot positions as would have made it possible for rhoetosaurus to support their weight, “he said.

Right hind foot of the fossil sample of the Rhoetosaurus brownei (QM F1659), in dorsal view. lacks the fifth. Credit: Jay P. Nair & Andrew Jannel.

“Finally, we looked at a series of sauropod footprints from all over the world, many of which indicated the presence of a fleshy health plate behind the toes, which supported what the legs told us.

” The addition of a damping plate that supports the raised heel seems to be one turnkey development during the development of sauropods, and apparently appeared in early members of the group sometime during the period from the beginning to the middle of Jura.

“The benefits of a soft tissue may have helped ease the trend towards the enormous body sizes we see in these dinosaurs.”

Trial fossils R. brownei were found near Roma in southwestern Queensland and dated 160 -170 million years ago, when Australia was part of the Gondwana supercontinent.

Jannel now uses computer technology to simulate how different foot positions and the presence of a soft tissue box affect the distribution distribution within the legs.

A cross section of an elephant foot alongside a human foot x-ray that reveals a striking skeletal similarity. Credit: University of Queensland

“In a nutshell, I use engineering tools to apply theoretical forces to the legs and assess how stress is distributed within these giant dinosaur feet, in order to provide mechanical evidence for the presence of such soft tissue

” It may be a dull and time-consuming process, but I have always been fascinated by paleontology, in particular the link between form and function in extinct animals “.

” There is so much more to know, but it is fantastic to discover that it can be “high-spirited” can have has been an important step in the development of sauropod dinosaurs. “


Breathe new life into old bones


More information:
Andréa Jannel et al. “Keep your feet on the ground”: Simulated motion range and posterior foot position of Middle Jurassic sauropod Rhoetosaurus brownei and its implications for sauropod biology, Journal of Morphology (2019). DOI: 10.1002 / jmor.20989

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University of Queensland

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A “high-greeted” dinosaur who went on his tiptoes (2019, May 17)
May 19, 2019
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