RARE 10″ Eothopicoceras conybearei Fossil Ammonite – Lower Sinemurian, Jurassic – Shepton Mallet UK – COA – Alice Purnell Collection

Description Presenting an extraordinary and rare 10-inch specimen of Eothopicoceras conybearei, a remarkable ammonite fossil from the Lower Sinemurian Stage of the Early Jurassic, found in the classic fossil locality of Shepton Mallet, Somerset, United Kingdom. This ammonite, showcasing its full coiled structure and detailed ribbing, is from the prestigious Alice Purnell Collection. The photograph shows the exact specimen you will receive. Geological Context: Species: Eothopicoceras conybearei Geological Period: Jurassic Stage: Lower Sinemurian (~199 – 196 million years ago) Location: Shepton Mallet, Somerset, United Kingdom Depositional Environment: Shallow marine shelf with carbonate-rich mudstones and silts, deposited during a period of marine transgression in post-Triassic recovery ecosystems Taxonomic Classification: Family: Echioceratidae Superfamily: Eoderoceratoidea Order: Ammonitida Suborder: Ammonitina Likely formally described by: S.S. Buckman (though authorship is debated or cited variably in early literature) Morphological Features: Eothopicoceras conybearei is distinguished by its evolute shell, prominent ribbing, and wide, open umbilicus. The ribs are sharp and consistent, bifurcating near the umbilical edge and extending across the flanks. The whorls are relatively compressed but clearly delineated, making this genus both visually striking and important in ammonite morphological evolution. Stratigraphic and Scientific Significance: This species is commonly associated with Sinemurian ammonite biozones and contributes to regional and intercontinental correlations of Lower Jurassic strata. It helps mark an evolutionary stage in early ammonite diversification following the end-Triassic extinction. Additional Details: All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity. Scale Rule Squares / Cube = 1cm. Please refer to the photo for full sizing and detail. From the scientifically curated Alice Purnell Collection. This is a top-grade collector’s item—a fossil that bridges visual beauty and scientific depth. Perfect for display, study, or long-term collection. Own a stunning example of Early Jurassic marine life today.