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

Description 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.