Description This listing is for a stunning and scientifically significant Fossil Ammonite of Kepplerites galilaeii from the Kellaways Beds, dating to the Lower Callovian Stage of the Jurassic Period. This specimen was discovered at Ashton Keynes, United Kingdom, a locality famed for its classic Jurassic marine exposures. The image provided shows the actual fossil you will receive, which has been hand-selected for its quality and preservation. Scale Rule Squares / Cube = 1cm — please refer to the photos for full sizing and details. Key Geological and Scientific Information: Species: Kepplerites galilaeii Fossil Type: Ammonite (extinct marine cephalopod) Geological Period: Jurassic Geological Stage: Lower Callovian (Middle Jurassic) Formation: Kellaways Beds (part of the Kellaways Formation) Location: Ashton Keynes, Wiltshire, England, UK Approximate Age: ~164 million years ago Order: Ammonitida Superfamily: Stephanoceratoidea Family: Kosmoceratidae Formally Described By: d’Orbigny Morphology Features: Kepplerites galilaeii is a diagnostic ammonite species characterized by moderately involute coiling, fine bifurcating ribbing, and a rounded venter. The ribs often initiate from slight umbilical tubercles and extend outward, providing an aesthetically appealing and scientifically valuable shell structure. This specimen displays these features in excellent detail. Depositional Environment: The Kellaways Beds represent marine sedimentation in a low-energy offshore shelf environment, composed primarily of silts and fine-grained sandstones. These conditions contributed to the excellent preservation of marine invertebrates such as ammonites. Biozone & Stratigraphic Relevance: Kepplerites galilaeii is the index species of the Kepplerites galilaeii Zone, a globally recognised ammonite biozone within the Lower Callovian. It is instrumental in correlating Jurassic sequences across Europe. Scientific Significance: As an index fossil, Kepplerites galilaeii is essential to Jurassic stratigraphy. Its distribution and evolutionary characteristics make it a key reference for understanding ammonite diversification and biogeographic patterns during the Middle Jurassic. Authenticity Guarantee: All of our fossils are 100% genuine specimens, sourced and selected with care. Every piece comes with a Certificate of Authenticity, ensuring confidence in its origin and identification. This Kepplerites galilaeii ammonite from Ashton Keynes is a museum-quality addition to any collection — ideal for fossil enthusiasts, collectors, and educational display.
