RARE Dichotomoceras stenocycloides Fossil Ammonite – Oxfordian Stage – Jurassic – France – Genuine Specimen with Certificate

Description This listing is for a RARE fossil ammonite specimen of Dichotomoceras stenocycloides from the Oxfordian stage of the Jurassic period, discovered in France. A highly collectible ammonite, this species displays striking evolutionary features characteristic of its time and location. Fossil Type: Ammonite (extinct marine cephalopod) Species: Dichotomoceras stenocycloides Geological Period: Jurassic Geological Stage: Oxfordian (~163 to 157 million years ago) Provenance: France Formation: Likely from marine calcareous deposits typical of the Oxfordian strata in western Europe Scientific and Geological Details: Order: Ammonitida Superfamily: Perisphinctoidea Family: Aspidoceratidae Morphology Features: Strongly ribbed evolute shell with characteristic branching ribs Whorls display narrow, compressed cross-section Ornamentation helps distinguish it from other closely related genera Depositional Environment: Open marine setting in the tropical-subtropical Tethys Ocean belt Deposits formed in relatively shallow carbonate-rich seafloors Biozone: Falls within the Perisphinctes–Dichotomoceras ammonite biozones of the Upper Oxfordian Notable: The genus Dichotomoceras is notable for its complex suture lines and as a key faunal indicator in Upper Jurassic stratigraphy Species-level identification (D. stenocycloides) has been used in European biostratigraphy Formally Described By: Arkell, W.J., an authority on Jurassic ammonites Why This Fossil Is Special: Rare and scientifically significant genus and species Excellent preservation of ornamental and structural features A prime example of ammonite morphology from the Oxfordian Ideal for display, educational purposes, or paleontological collections Collected from a classic French Jurassic locality with stratigraphic importance Additional Information: All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity Scale Rule Squares / Cube = 1cm: Full sizing please see photo You will receive the exact fossil shown in the listing – carefully selected for quality and scientific value