Rare Orthaspidoceras liparum Fossil Ammonite – Kimmeridgian, Upper Jurassic, La Rochelle France – Genuine + COA

Description

A rare Orthaspidoceras liparum Fossil Ammonite, from the Kimmeridgian Stage of the Upper Jurassic, collected at La Rochelle, France. This ammonite is a striking representative of the genus Orthaspidoceras, known for its robust whorls, coarse ribbing, and significance in Upper Jurassic stratigraphy. The specimen pictured is the exact one you will receive, supplied with a Certificate of Authenticity.

Fossil Type & Species:

• Type: Ammonite (extinct marine cephalopod)
• Species: Orthaspidoceras liparum
• Order: Ammonitida
• Superfamily: Perisphinctoidea
• Family: Aspidoceratidae

Geological Context:

• Period: Jurassic
• Epoch/Stage: Upper Jurassic – Kimmeridgian (approx. 157.3 to 152.1 million years ago)
• Biozone: Typically associated with the Acanthicum Zone, significant in Kimmeridgian ammonite stratigraphy of western Europe
• Formation: Kimmeridgian limestone and marl sequences of western France
• Depositional Environment: Marine shelf with carbonate sedimentation, producing excellent preservation of ammonites

Locality:

• Region: La Rochelle, France

Morphology & Features:

• Strong, thick whorls with wide umbilicus
• Coarse ribbing running across the flanks and ventral area
• Evolute shell form with pronounced ornamentation
• Robust and easily recognisable features characteristic of Orthaspidoceras

Scientific Notes:

• Orthaspidoceras liparum was first described in the 19th century during systematic studies of Kimmeridgian ammonites from France
• The genus Orthaspidoceras is an important member of the Aspidoceratidae, widely used in European Kimmeridgian biostratigraphy

Notable Details:

• Excellent preservation with strong ribbing and diagnostic shell features
• Rare French ammonite from a classic Jurassic locality
• 100% genuine, natural fossil – no restoration
• Scale Reference: Each square or cube = 1cm. Please see photos for accurate sizing

Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and professionally curated. Every purchase includes a Certificate of Authenticity. The fossil shown is the exact specimen you will receive.

This Orthaspidoceras liparum ammonite is a rare and scientifically valuable fossil from the Kimmeridgian of La Rochelle – an excellent addition for collectors, researchers, or natural history displays.