Description
Rasenia Fossil Ammonite – Lower Kimmeridgian, Jurassic – Deux Sèvres, France
100% Genuine Fossil with Certificate of Authenticity
We are excited to present this Rasenia fossil ammonite, discovered in Deux Sèvres, France. This fascinating specimen dates back to the Lower Kimmeridgian stage of the Jurassic Period (~157 million years ago). The Rasenia ammonite is well-known for its distinctive spiral shape and robust shell structure, making it a rare and valuable fossil for collectors and enthusiasts alike.
Geological and Fossil Information:
- Fossil Type: Rasenia Fossil Ammonite
- Species: Rasenia
- Morphology Features: The Rasenia ammonite is characterized by its spiral coiled shell with deep sutures and distinctive whorls. The shell structure is relatively thick, offering excellent preservation of its intricate features, including growth lines and ribbing.
- Geological Stage: Lower Kimmeridgian, Jurassic (~157 million years ago)
- Depositional Environment: The Rasenia ammonite lived in shallow marine environments typical of the Kimmeridgian seas. These seas provided ideal conditions for ammonites, allowing for the development of this species’ characteristic spiral shells.
- Biozone: The fossil comes from the Lower Kimmeridgian biozone, a period that is important for understanding the Jurassic marine ecosystem and the diversity of ammonites during this time.
- Family: Desmoceratidae
- Super Family: Desmocerataceae
- Order: Ammonitida
- Formally Identified By: This fossil has been formally identified based on its spiral shell and distinctive morphological features, and its geological context in Deux Sèvres, France, ensures its authenticity.
Size and Visuals:
The fossil measures approximately 3 inches in diameter. A scale rule (1cm squares) is included in the attached photo for accurate size reference. The photo is of the actual specimen you will receive, carefully chosen to highlight its exceptional preservation and intricate details.
Authenticity and Certification:
All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity, ensuring the provenance and authenticity of the fossil. This Rasenia ammonite from the Lower Kimmeridgian stage of the Jurassic Period is a well-preserved example of Jurassic marine life, making it a valuable addition to any fossil collection.






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