RARE: Trionyx Fossil Turtle Ulna – Bracklesham Beds, Eocene, Bracklesham Bay Sussex UK


£ 120.00

This listing offers a rare fossil ulna (forelimb bone) from a turtle of the
genus Trionyx, collected from the Bracklesham Beds at Bracklesham Bay, Sussex, United Kingdom. Dating to the Eocene Epoch, this specimen represents part of the limb structure of a soft-shelled turtle, offering a fascinating glimpse into the marine and coastal ecosystems of southern England over 40 million years ago.

Fossil Type:


• Specimen: Turtle Forelimb Bone – Ulna
• Genus: Trionyx
• Part of the limb articulation of a soft-shelled turtle (Family Trionychidae)

Geological Context:


• Period: Paleogene
• Epoch: Eocene
• Stage: Lutetian (~47.8 to 41.3 million years ago)
• Formation: Bracklesham Beds (part of the Bracklesham Group)
• Depositional Environment: Shallow marine to coastal estuarine. These beds were laid down in warm subtropical waters with rich biodiversity, capturing both terrestrial and marine vertebrate fossils.

Morphological Features:


• Elongated ulna with characteristic curvature, consistent with Trionychid turtles
• Dense, fossilised bone with smoothed cortical surface and mineralised preservation typical of Bracklesham material
• Colour ranges from brown to grey with natural patina, shaped by burial conditions in marine clay and sand

Scientific Importance:


• Trionyx represents a lineage of soft-shelled turtles still found today in Asia, Africa, and North America. Fossils from the UK are rare and of high scientific and collector value
• Specimens like this contribute to our understanding of Eocene chelonian diversity and the palaeoenvironment of Britain’s coastal systems during the Paleogene

Locality Information:


• Bracklesham Bay, Sussex, UK – one of Britain’s most important fossil sites, known for its Eocene marine fauna including sharks, rays, turtles, crocodiles, and fish

Authenticity & Display:

All of our fossils are 100% Genuine Specimens and are accompanied by a Certificate of Authenticity. The photographs show the actual fossil you will receive. Full sizing can be viewed in the image provided, with the scale cube = 1cm.

This is a truly rare fossilised limb bone from a soft-shelled turtle that lived in ancient subtropical seas. A premium collector’s piece for fossil enthusiasts, reptile specialists, and palaeontologists alike.

Own a rare piece of Britain's Eocene natural history—an authentic limb bone of Trionyx from over 40 million years ago.