Rare Hypoxynoticeras sphenonotus Fossil Ammonite – Lower Pliensbachian, Jurassic, Bishops Cleeve UK

Description This listing features a genuine Hypoxynoticeras sphenonotus fossil ammonite from the Lower Pliensbachian Stage of the Early Jurassic Period, expertly sourced from Bishops Cleeve, Gloucestershire, United Kingdom. Fossil Type: Ammonite Species: Hypoxynoticeras sphenonotus Geological Age: Lower Jurassic Stage: Lower Pliensbachian (Jamesoni Subzone) Location Found: Bishops Cleeve, Gloucestershire, UK Formation: Lower Lias Family: Eoderoceratidae Superfamily: Eoderoceratoidea Order: Ammonitida Geological & Scientific Significance: Hypoxynoticeras sphenonotus is a rare and scientifically significant ammonite species typically used for regional stratigraphic correlation within the Lower Jurassic. Characterised by its compressed, evolute shell and sharp ribbing, this species is most commonly associated with the early part of the Jamesoni Zone. The specimen from Bishops Cleeve represents a well-preserved example from the classic Lower Lias coastal and inland exposures of the UK. Depositional Environment: The Lower Lias was deposited in a shallow marine environment under relatively calm, low-energy conditions, which favoured the preservation of complete ammonites and other marine organisms. The sediment matrix is typically composed of fine-grained mudstones and limestones. Morphology Features: Compressed shell with rounded venter Tight coiling with visible inner whorls Pronounced, regularly spaced ribs Evolute coiling pattern This is a carefully chosen fossil, and the photograph shows the exact specimen you will receive. The scale rule cube in the image represents 1cm squares—please refer to the photo for accurate sizing. Authenticity Guaranteed: All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity. Whether you’re a seasoned collector or gifting a rare Jurassic treasure, this fossil offers a striking glimpse into marine life over 190 million years ago. Add a rare Lower Jurassic ammonite to your collection today!