Oldest Deliberately Collected Ichthyosaur Fossil Found in Roman Britain, 1,800 Years Ago

A fossilized vertebra of an ichthyosaur, the oldest known example of a deliberately collected fossil, was discovered in Colchester, England, dating back approximately 1,800 years. The find was reported in a study published in Brittania and highlights the intersection of ancient history and paleontology.

Significance of the Ichthyosaur Fossil

Discovered in 2024 at the site of the former Essex County Hospital, the fossil belonged to a dolphin-shaped marine reptile that lived during the Mesozoic Era. According to Patrick Spencer, lead author of the study and archaeologist at the Colchester Archaeological Trust, the vertebra was found in a unique pit along with various artifacts, including pottery shards and a Roman toilet spoon.

The ichthyosaur vertebra, which is over 100 million years old, represents a significant connection between ancient marine life and the Roman occupation of Britain. Spencer noted, "Holding such a fossil collapses vast stretches of time into a single object," emphasizing its historical importance.

Context and Discovery

The fossil was likely collected from the east Kent coast, a region known for its Roman quarrying industry. This area was active during the Roman period, shipping greensand building stone across Britain. Spencer suggested that the individual who collected the fossil could have been involved in this industry.

Moreover, the condition of the fossil raises intriguing questions about its purpose. Spencer posited two theories: one, that it may have been viewed as a sacred relic connected to mythology; and two, that it was simply an object of human curiosity. He mentioned that large fossils were often considered the remains of heroes or monsters in classical antiquity, potentially leading to their display as relics.

Potential for Future Discoveries

This ichthyosaur fossil is not alone; another large fossil from a plesiosaur was previously found in Cambridge, suggesting that more such finds may exist in the region. Spencer believes that the East of England could hold further discoveries, stating, "This might indicate more such finds are waiting to be uncovered, perhaps also elsewhere in Roman Britain."

The significance of this fossil extends beyond its age, linking it to the early days of paleontology and the pioneering work of fossil hunter Mary Anning, whose discoveries fundamentally changed our understanding of prehistoric life.