A small, unremarkable-looking fossil that remained forgotten in a drawer for around 40 years has now been identified as the first dinosaur bone ever discovered in Antarctica.
The specimen was originally excavated in 1985, but at the time the researchers were uncertain about what they had found. As a result, it was placed in storage within the geology collection of the British Antarctic Survey (BAS) in Cambridge, where it stayed largely overlooked for decades.
More recently, palaeontologists re-examined the fossil and confirmed that it is a tail bone belonging to a Titanosaur, a group of dinosaurs known for including some of the largest land animals that ever existed.
This finding is significant because it helps scientists better understand how these massive creatures may have lived in Antarctica, a region where dinosaur fossils are extremely rare and the scientific record remains limited.
Dr Mark Evans, who manages the collections at the British Antarctic Survey (BAS), recently identified the fossil while going through thousands of specimens gathered from Antarctic expeditions over several decades.
He explained that discoveries like this often happen unexpectedly, saying that simply by examining forgotten drawers in storage, researchers can occasionally come across something that stands out as unusual or significant.
The fossil had originally been collected on James Ross Island, and its discovery was documented in a field notebook belonging to geologist Dr Mike Thomson. The notes included a small, carefully drawn sketch of the specimen dated 9 December 1985, along with the description “vertebra of large reptile,” estimating its width at around 10 centimetres.
According to Evans, the original team likely assumed the bone belonged to a marine reptile. However, upon closer inspection, he immediately recognised that the vertebra had clear characteristics of a dinosaur. He also noted that, based on the date of its discovery, it would represent the first dinosaur fossil ever found on the Antarctic continent.
To verify his finding, he contacted Professor Paul Barrett from the Natural History Museum (NHM), who examined the fossil to confirm its identity.
Barrett noted that, despite its plain appearance, the bone has a clearly distinctive structure. While holding it, he pointed out a hollow at one end and a rounded projection at the other. These features are part of a vertebra system that connects in a ball-and-socket formation, forming a flexible chain that runs from the head down to the tail.
He explained that, upon seeing the specimen, he immediately recognised it as belonging to a Titanosaur. According to him, the combination of characteristics is unique to this group of dinosaurs, leaving little doubt about its classification. In his view, the evidence made it a clear case of a Titanosaur discovery.
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