Description
A fine and well-preserved Parkinsonia Fossil Ammonite, from the Lower Bathonian Stage of the Jurassic Period, collected in Calvados, Normandy, France. This ammonite is a classic representative of the genus Parkinsonia, widely recognised in Middle Jurassic biostratigraphy. The exact specimen shown in the photos is the one you will receive, and it comes with a Certificate of Authenticity.
Fossil Type & Species:
- Type: Ammonite (extinct marine cephalopod)
- Genus: Parkinsonia (exact species not specified)
- Order: Ammonitida
- Superfamily: Stephanoceratoidea
- Family: Parkinsoniidae
Geological Context:
- Period: Jurassic
- Epoch/Stage: Middle Jurassic – Lower Bathonian (approx. 168.3 to 166.1 million years ago)
- Biozone: Parkinsonia Zone – a key interval in European Bathonian ammonite stratigraphy
- Depositional Environment: Shallow marine shelf with limestones and marls, highly favourable for ammonite fossilisation
Locality:
- Region: Calvados, Normandy, France
- Formation: Lower Bathonian sediments of the Paris Basin (specific stratigraphy unconfirmed)
Morphology & Features:
- Moderately evolute shell with wide umbilicus
- Strong ribbing with bifurcating ribs extending across the flanks
- Rounded venter with uninterrupted ribbing
- Characteristic morphology of the genus Parkinsonia
Scientific Notes:
- The genus Parkinsonia was first described by Sowerby in 1822
- This genus is significant in biostratigraphic studies, frequently used to define Bathonian zones in France and the UK
Notable Details:
- Excellent preservation of ribbing and whorl structure
- Natural, unrestored specimen
- Scale Reference: Each square or cube in the image = 1cm. Please see the photo for accurate specimen size
Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and professionally curated. A Certificate of Authenticity is included with your purchase. The fossil shown is the exact one you will receive.
This Parkinsonia ammonite is both scientifically important and visually attractive – a fine addition for collectors, educational use, or display.





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