Cotteswoldia digna Ammonite Fossil | Upper Toarcian, Jurassic | Isère France | Alice Purnell Collection | Genuine with Certificate

Description

Fossil Type & Species:

This listing features a genuine ammonite fossil of Cotteswoldia digna, an elegant and scientifically valuable species from the Upper Toarcian Stage of the Early Jurassic Period. This well-preserved specimen was discovered in Isère, southeastern France, and is part of the respected Alice Purnell Collection, known for curating rare and academically important fossil specimens.

Geological Formation & Insight:

Cotteswoldia is a genus of moderately evolute ammonites within the family Hildoceratidae, with Cotteswoldia digna being recognised by its prominent ribbing, smooth inner whorls, and distinctive shell proportions. These ammonites are particularly valuable for biostratigraphic correlation, helping to define the subdivisions of the Upper Toarcian (~180–178 million years ago).

This specimen comes from marine deposits in the Isère region of France, a locality rich in Jurassic stratigraphy and fossils. During the Toarcian, this area lay beneath a shallow seaway on the northwestern edge of the Tethys Ocean, providing ideal conditions for ammonite diversity and preservation.

The Upper Toarcian is especially significant geologically, as it marks an interval of global climate change and marine extinction events, making ammonites from this time valuable for both scientific study and collection.

Item Specifics:

• Fossil Type: Ammonite
• Species: Cotteswoldia digna
• Geological Age: Upper Toarcian Stage, Early Jurassic (~180–178 million years ago)
• Formation: Toarcian marine sedimentary rocks
• Locality: Isère, France
• Provenance: From the Alice Purnell Collection
• Preservation: Excellent – fine ribbing and complete whorl structure visible
• Colour: Natural light brown to grey tones in matrix
• Size: Please refer to scale photo — 1cm cube for reference
• Condition: 100% natural; no restoration
• Specimen: The exact fossil shown in the photographs is the one you will receive

Authenticity Guarantee:

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity. This Cotteswoldia digna fossil is part of the expertly curated Alice Purnell Collection, ensuring quality, provenance, and scientific value.

Shipping & Packaging:

Securely packaged with full tracking. A rare and scientifically meaningful addition to any fossil collection — ideal for collectors, educators, or as a one-of-a-kind natural history gift.

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