RARE Subkossmatia opis Fossil Ammonite - Middle Jurassic Callovian - Bourges France - Genuine with COA - Collector Specimen
£ 24.00
Available here is a rare and scientifically notable specimen of Subkossmatia
opis, a fossil ammonite from the Middle Callovian stage of the Jurassic period, collected in the region of Bourges, France. This beautifully preserved ammonite comes from marine strata deposited in the western Tethys seaway, a prolific region for Jurassic marine fossils.Subkossmatia opis is a distinctive member of the family Reineckeiidae, often identified by:
• Evolute coiling with all whorls visible
• Broad, strong primary ribs that bifurcate mid-flank
• A rounded to sub-quadrate cross-section and ventral keel
• Species: Subkossmatia opis
• Order: Ammonitida
• Superfamily: Perisphinctoidea
• Family: Reineckeiidae
• Geological Stage: Middle Callovian, Middle Jurassic
• Location: Bourges, France
• Depositional Environment: Shallow marine carbonate platform, western Tethyan shelf
• Biozone: Likely within the Reineckeiidae-bearing upper Callovian zones (e.g., Eucyclum Subzone)This specimen dates to approximately 165 million years ago, a period marked by diversification and radiation of marine ammonoids. Fossils of Subkossmatia opis are uncommon, making this a particularly valuable item for collectors, museums, or educational displays.The fossil listed is a carefully chosen specimen, and the photo shows the exact item you will receive.
• Scale cube = 1cm. Please refer to the image for full size and proportion.
• An excellent display fossil for any serious collector or educational collection.All fossils we sell are 100% genuine specimens and come with a Certificate of Authenticity, documenting identification and provenance. What You Will Receive:
• 1 x authentic Subkossmatia opis ammonite fossil (as pictured)
• Certificate of Authenticity
• Secure, protective packaging with tracked shipping Why Buy From Us?
• Fossils are responsibly sourced and professionally prepped
• Full authentication and geological documentation included
• Trusted by collectors, curators, and educators worldwide
opis, a fossil ammonite from the Middle Callovian stage of the Jurassic period, collected in the region of Bourges, France. This beautifully preserved ammonite comes from marine strata deposited in the western Tethys seaway, a prolific region for Jurassic marine fossils.Subkossmatia opis is a distinctive member of the family Reineckeiidae, often identified by:
• Evolute coiling with all whorls visible
• Broad, strong primary ribs that bifurcate mid-flank
• A rounded to sub-quadrate cross-section and ventral keel
• Species: Subkossmatia opis
• Order: Ammonitida
• Superfamily: Perisphinctoidea
• Family: Reineckeiidae
• Geological Stage: Middle Callovian, Middle Jurassic
• Location: Bourges, France
• Depositional Environment: Shallow marine carbonate platform, western Tethyan shelf
• Biozone: Likely within the Reineckeiidae-bearing upper Callovian zones (e.g., Eucyclum Subzone)This specimen dates to approximately 165 million years ago, a period marked by diversification and radiation of marine ammonoids. Fossils of Subkossmatia opis are uncommon, making this a particularly valuable item for collectors, museums, or educational displays.The fossil listed is a carefully chosen specimen, and the photo shows the exact item you will receive.
• Scale cube = 1cm. Please refer to the image for full size and proportion.
• An excellent display fossil for any serious collector or educational collection.All fossils we sell are 100% genuine specimens and come with a Certificate of Authenticity, documenting identification and provenance. What You Will Receive:
• 1 x authentic Subkossmatia opis ammonite fossil (as pictured)
• Certificate of Authenticity
• Secure, protective packaging with tracked shipping Why Buy From Us?
• Fossils are responsibly sourced and professionally prepped
• Full authentication and geological documentation included
• Trusted by collectors, curators, and educators worldwide
