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Palaeontologists Unearth 139 Million-Year-Old Pregnant Dinosaur Fossil With Several Embryos

Home> News

Published 19:23 10 May 2022 GMT+1

Palaeontologists Unearth 139 Million-Year-Old Pregnant Dinosaur Fossil With Several Embryos

The discovery is thought to be the first of its kind

Claire Reid

Claire Reid

Archeologists in Chile have unearthed the fossilised remains of a 13ft-long pregnant ichthyosaur from a melting glacier.

The 139-million year-old fossil, which has been named ‘Fiona’ by scientists at the University of Manchester, was carefully collected by helicopter following an expedition in March and April this year by the University of Magallanes (UMAG) in the Tyndall Glacier area of Chilean Patagonia. 

Ichthyosaurs were marine reptiles that lived in the age of dinosaurs, and Fiona is the only pregnant female of Valanginian-Hauterivian age – between 129 and 139 million years old from the Early Cretaceous period – to be excavated on the entire planet. 

Researchers in Chile.
University of Manchester

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Now, researchers are keen to find out what information they can gather from the incredibly rare find. 

Dr Judith Pardo-Pérez, magellanic palaeontologist and researcher at the GAIA Antarctic Research Centre, UMAG, said: “At four metres long, complete, and with embryos in gestation, the excavation will help to provide information on its species, on the palaeobiology of embryonic development, and on a disease that affected it during its lifetime.” 

Dr Dean Lomax, a palaeontologist and visiting scientist at The University of Manchester, said: “The fact that these incredible ichthyosaurs are so well preserved in an extreme environment, revealed by a retreating glacier, is unlike anywhere else in the world.

A rendering of how an ichthyosaur may have looked.
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"The considerable number of ichthyosaurs found in the area, including complete skeletons of adults, juveniles, and newborns provides a unique window into the past.

"The international collaboration helps to share this exceptional ichthyosaur graveyard with the world and, to a large extent, to promote science."

The expedition to collect Fiona was no mean feat, with experts having to sleep outside in tents. A hangar also had to be set up over the remains to offer some protection from 90kph winds, snow and heavy rain. 

The team out in Chile under a hangar to help combat the extreme weather conditions.
University of Manchester

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Héctor Ortiz, biologist and palaeontological excavator from the Chilean Antarctic Institute and the University of Chile, who worked on the site, said it was ‘the hardest excavation’ he had been on in his entire career. 

Dr Lomax added: “The weather was so extreme that we could not get to the ichthyosaur site every day and had to remain in camp. On those days when the team could reach the site, they documented the ichthyosaurs and other fossils and discovered new specimens.

"Amazingly, on average, two ichthyosaurs were found every day.”

If you have a story you want to tell, send it to UNILAD via [email protected]  

Featured Image Credit: University Of Manchester

Topics: Science, World News

Claire Reid
Claire Reid

Claire is a journalist at UNILAD who, after dossing around for a few years, went to Liverpool John Moores University. She graduated with a degree in Journalism and a whole load of debt. When not writing words in exchange for money she is usually at home watching serial killer documentaries surrounded by cats.

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