Rare Kepplerites Fossil Ammonite, Jurassic, Kellaways Beds, Lower Callovian, UK, Ashton Keynes, Genuine with COA

Description This listing features a beautifully preserved Fossil Ammonite of the genus Kepplerites 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 well-regarded for its classic Middle Jurassic ammonite assemblages. The image shows the actual fossil you will receive, chosen for its detail and quality. Scale Rule Squares / Cube = 1cm — please refer to the photos for full sizing and multiple views.   Key Geological and Scientific Information: Genus: Kepplerites 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   Morphology Features: Kepplerites is characterised by moderately involute coiling, strong radial ribbing that bifurcates mid-flank, and a generally rounded venter. The shell often displays fine tuberculation near the ventrolateral edge. These morphological traits make it a diagnostic member of Lower Callovian ammonite faunas.   Depositional Environment: The Kellaways Beds represent marine shelf deposits laid down in a low-energy, offshore marine environment, consisting of sandy mudstones and siltstones. These settings were ideal for preserving shelly fauna, including ammonites.   Biozone & Zone Information: Kepplerites is the index genus for the Kepplerites galilaeii Zone, a major ammonite biozone in the Lower Callovian used extensively in stratigraphic correlation across Europe.   Scientific Significance: The genus Kepplerites is a key biostratigraphic marker in the Middle Jurassic and contributes to the refinement of zonal frameworks. It also plays an important role in understanding cephalopod evolution and paleobiogeography.   Authenticity Guarantee: All of our fossils are 100% genuine specimens and are carefully selected for their preservation and provenance. Each item is provided with a Certificate of Authenticity.   Add this scientifically significant Kepplerites ammonite to your fossil collection today — a genuine piece of Jurassic natural history from the United Kingdom.