A fossil that was sitting in a set drawer for decades has been discovered to belong to the first dinosaur stays ever found in Antarctica.
The vertebra or spine was discovered in 1985 by a British Antarctic Survey (BAS) expedition, however was initially assessed as belonging to a big reptile, in accordance to an announcement from London’s Natural History Museum on Monday.
After a number of decades in storage, it was noticed by Mark Evans, a palaeontologist and supervisor of the geological collections on the BAS.
“It looks unusual, I just needed to make sure it was what I thought it was,” Evans advised NCS on Tuesday.
The fossil belonged to a Titanosaur, a bunch of long-necked herbivorous sauropods that features the biggest dinosaurs that ever lived.
They had a typical weight of 15 metric tons (16.5 US tons), in accordance to the Natural History Museum. The largest identified specimen was estimated to be 37 meters (about 121 toes) lengthy and weighed about 63.5 metric tons (70 US tons).
However, this explicit vertebra, which measures round 10 centimeters (4 inches) in diameter, belongs to a juvenile or small grownup that may have been round six to seven meters (20-23 toes) lengthy, in accordance to the assertion.
“This bone sat in a collection drawer for decades until new research revealed it for what it was: rare evidence that long-necked sauropod dinosaurs once lived in Antarctica,” mentioned examine coauthor Matthew C. Lamanna, Mary R. Dawson curator in vertebrate paleontology on the Carnegie Museum of Natural History, in the assertion.
“At first glance this appears to be an unremarkable fossil, but it holds an important place in the history of Antarctic exploration as the first dinosaur fossil found on the continent,” mentioned Paul Barrett, benefit researcher on the Natural History Museum, in the assertion.
The dinosaur it belonged to lived round 82 million years in the past, throughout the Late Cretaceous interval.
“At the time this animal lived, we know Antarctica would have (been) covered in lush temperate forest providing ample food for large herbivores,” mentioned Barrett.
The ice that presently covers many of the continent implies that it has a sparse fossil report, however that will change in the longer term, he mentioned.
“There are likely many more dinosaurs to be discovered on the continent. As climate change causes ice to retreat we may indeed find further evidence of this past biodiversity,” Barrett added.
The analysis additionally advances our understanding of how dinosaurs moved across the southern continents, in accordance to examine coauthor Samantha Beeston, a palaeontology doctoral scholar at University College London.
“During the Cretaceous when this animal lived, Antarctica formed part of the supercontinent of Gondwana, and this new find shows that its close relatives travelled between South America and Australia via Antarctica,” Beeston mentioned in the assertion.
Roy Smith, a lecturer in vertebrate palaeontology on the University of Portsmouth, England, who was not concerned in the analysis, mentioned that the discover is a “wonderful reminder” in regards to the significance of scientific collections.
“Although this fossil is only a single vertebra, its significance is immense,” he advised NCS in an e-mail Tuesday.
“As the first dinosaur fossil discovered in Antarctica, it provides crucial evidence for understanding how dinosaurs dispersed across the southern continents and demonstrates that these remarkable animals inhabited every continent on Earth,” mentioned Smith.
“It also highlights the enduring scientific value of carefully curated museum collections, which continue to yield extraordinary discoveries decades after specimens are first collected,” he added.
Steve Brusatte, a professor of paleontology and evolution on the University of Edinburgh in Scotland, who was not concerned in the analysis, advised NCS that it is a “cool discovery.”
“We know very very little about the dinosaurs that once lived on Antarctica,” he mentioned Tuesday. “This is just a single incomplete bone, but it has outsized importance.”
A paper on the fossil has been revealed in the journal Acta Palaeontologica Polonica.