A paleontological discovery has emerged from the collections of the British Antarctic Survey in Cambridge, where a fossil had remained unstudied since its initial discovery in 1985. The specimen, a tail vertebra from a Titanosaur, was collected on James Ross Island and documented in a field notebook by geologist Dr. Mike Thomson on December 9, 1985, though the original research team was uncertain about its classification and stored it among thousands of other geological samples.
Dr. Mark Evans, the collections manager at BAS, identified the fossil while examining materials from Antarctic expeditions. He recognized distinctive anatomical features characteristic of dinosaurs and consulted Prof Paul Barrett from the Natural History Museum to confirm the identification. Barrett examined the vertebra’s unique structural properties, including a hollow cavity on one end and a rounded protrusion on the other, which are characteristic of Titanosaur spinal bones that form ball-and-socket joints along the creature’s length.
Titanosaurs represent a group of long-necked, four-legged herbivorous dinosaurs, with more than 100 species identified globally. The largest specimens exceeded 115 feet in length and weighed approximately 60 tonnes. Based on the size of the discovered vertebra, scientists estimate this Antarctic Titanosaur measured approximately 23 feet long, suggesting it may have been either a juvenile or a naturally smaller member of its species.
The animal would have inhabited Antarctica approximately 82 million years ago during the Late Cretaceous Period, when the continent supported lush forest ecosystems suitable for plant-eating fauna. Though other dinosaur fossils have been discovered in Antarctica since 1985, they remain relatively scarce due to the challenging conditions for paleontological fieldwork and the extensive ice coverage concealing the geological record. The findings have been documented in a paper published in the journal Acta Palaeontologica Polonica and contribute to scientific understanding of ancient ecosystems in one of Earth’s most remote regions.
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