Club‐shaped borings: <i>Gastrochaenolites</i>

Borings are traces that can be transported easily within clasts and shells. One of the commonest recent borings around the British Isles is the club‐shaped Gastrochaenolites Leymerie. In the Mesozoic and younger, Gastrochaenolites was commonly a boring of bivalves, sometimes preserved in situ , but it extends back to the Ordovician with no evidence of the producer.