Scientific name: †Diplomystus dentatus - Fossil Fish Location: Kemmerer, Wyoming, USA Geological Formation: Green River Formation Age: Paleogene, Eocene (~48-51 million years) Size: Plate: 18x13x2cm - The fish: 14cm Ref: S322 Observations: Beautiful large fossil fish (Diplomystus dentatus species) from the Eocene Age Green River Formation of Wyoming (USA). The specimen is wonderfully detailed, and mainly the head ("skull") its truly well preserved. The specimen is completely natural, however this specimen has been lightly excavated around its outline to make it stand out (highlight). It has also been given a color enhancement treatment to make it more striking, while also serving as a preservation treatment. Some other isolated fish scales are also visible on the same plate. Fifty million years ago ancient Fossil Lake existed in what is now southwest Wyoming. The unusual chemistry of fossil lake prevented decay and scavenging of dead organisms while millimeter-thick layers of alternating limestone matter slowly accumulated. The result is laminated limestones that contained the highest concentration of fossil fish in the world. Since the discovery in the 1870's, many perfectly preserved fossil fish have been recovered. Preserved with the fish in the laminated limestone is a complete aquatic ecosystem: plants, insects, crustaceans, amphibians (frog and primitive salamander), alligators, turtles, birds, mammals, etc All our fossils come with Certificate of Authenticity. Every week, the issued Certificates of Authenticity are updated in our website database verification system. If you find that your certificate has not yet been updated, please contact us and we will update it immediately. Display not included. IMPORTANT SHIPPING INFORMATION: All shipments to the USA are sent via UPS Express. We are not responsible for any additional tariff charges that US Customs may add as import fees on the declared commercial value.