RARE Aspidoceras Ammonite Fossil | Oxfordian Jurassic | Madagascar | Authentic Fossil with Certificate of Authenticity

Description Available here is a RARE Aspidoceras ammonite fossil from the Oxfordian Stage of the Late Jurassic, discovered in Madagascar. This stunning specimen dates to approximately 163–157 million years ago and showcases the intricate ornamentation and robust form typical of this well-known genus. As always, this is a 100% genuine fossil and comes with a Certificate of Authenticity. The photo shows the actual specimen you will receive. Scale cube = 1cm. Please refer to the images for full sizing and details. Geological & Taxonomic Information: Fossil Type: Ammonite (extinct marine cephalopod) Genus: Aspidoceras Family: Aspidoceratidae Superfamily: Perisphinctoidea Order: Ammonitida Geological Stage: Oxfordian, Late Jurassic (~163–157 million years ago) Location: Madagascar Depositional Environment: Shallow marine carbonate platform, representative of tropical Tethyan environments during the Jurassic Biozone Relevance: Aspidoceras species serve as important index fossils in the Oxfordian of the Tethys Realm Morphological Features: Thick, broad shell with heavy ribbing and often prominent tubercles (nodes) along the ventrolateral areas Strongly ornamented whorls with pronounced growth lines Planispiral, involute coiling typical of Aspidoceratidae Suture lines, where visible, are highly complex and decorative Scientific & Collector Importance: Aspidoceras is one of the most iconic genera of Late Jurassic ammonites, known for its dramatic ornamentation and widespread presence in Upper Jurassic marine deposits. Its evolutionary and biostratigraphic importance makes it a valuable piece for both collectors and researchers. Collector & Display Appeal: High visual impact due to bold sculptural form and size Ideal for fossil collections, interior décor, or museum-quality display Great educational example of Late Jurassic marine biodiversity Why Buy from Us? Every fossil is 100% genuine and responsibly sourced Includes a Certificate of Authenticity Professionally cleaned, prepared, and accurately described Own a piece of ancient ocean history with this exceptional Aspidoceras ammonite fossil from Oxfordian-aged rocks of Madagascar—an impressive and rare addition to any serious fossil collection.