Fossil Nautilus Eutrephoceras | Bathonian Jurassic | Barreme France | Genuine Specimen w/ COA

Description This listing features a rare and well-preserved fossil of Eutrephoceras, a genus of extinct nautiloid cephalopods, from the Bathonian stage of the Middle Jurassic, found in Barreme, France—a locality noted for its fine marine sedimentary fossil beds. The fossil is a 100% genuine specimen, carefully selected for its completeness and scientific interest. You will receive the exact specimen shown in the photo, and a 1cm cube scale is included to provide accurate size context—please refer to the image for full dimensions. A Certificate of Authenticity is included with every purchase. Geological & Scientific Information: Genus: Eutrephoceras Type: Fossil Nautilus (extinct nautiloid cephalopod) Age: Approx. 168–166 million years old Geological Period: Jurassic Stage: Bathonian (Middle Jurassic) Location Found: Barreme, France Order: Nautilida Superfamily: Nautilaceae Family: Nautilidae Morphological Features: Eutrephoceras is known for its involute, moderately compressed shell with a smooth or faintly ribbed surface. Sutures are gently sinuous, and the siphuncle is centrally positioned. The specimen often shows strong internal chamber divisions visible in polished or sectioned examples. Depositional Environment: Shallow marine shelf environment with fine-grained calcareous sedimentation. Ideal for preserving aragonitic shells in fine detail. Scientific Importance: While not as diverse as ammonites, nautiloids like Eutrephoceras help illustrate evolutionary trends in cephalopods and are important for understanding Middle Jurassic marine biodiversity. Additional Notes: Unlike their ammonite relatives, nautiloids had simpler suture patterns and different life habits. Eutrephoceras survived longer than many nautiloids, with relatives extending into the Cretaceous. This specimen offers a glimpse into their Jurassic ancestry. Why Buy From Us? Each fossil is authentic, professionally sourced, and quality-checked. Every piece comes with a Certificate of Authenticity. You receive the actual item shown in the photograph. Ideal for fossil collectors, display, science teaching, or as a unique gift. Add this Eutrephoceras fossil to your collection and own a genuine relic of Jurassic marine life from the renowned fossil beds of Barreme, France!