Description
This listing is for a Rare 2.75″ Fossil Ammonite (Orionoides pseudorion) from the Callovian Stage of the Middle Jurassic, discovered at Montreuil Bellay (Maine-et-Loire, France).
100% Genuine Fossil Specimen – All of our fossils are authentic and come with a Certificate of Authenticity.
Exact Specimen Shown – The photos provided are of the actual fossil you will receive.
Scale for Reference – Scale rule squares/cube = 1cm. Please see photos for full sizing.
Geological & Scientific Details:
- Fossil Type: Ammonite (extinct marine mollusc, related to squid and octopus).
- Species: Orionoides pseudorion.
- Order: Ammonitida.
- Superfamily: Stephanoceratoidea.
- Family: Stephanoceratidae.
- Geological Period: Jurassic.
- Stage/Age: Callovian (approx. 166 – 163 million years ago).
- Locality: Montreuil Bellay, France.
Notable Features & Morphology:
- Shell Form: Involute with compressed whorls.
- Ribs: Strong ribbing across the flanks, often bifurcating toward the venter.
- Whorl Section: Narrow to rounded, with detailed ornamentation typical of Orionoides.
- Size: At 2.75″, this is a fine and rare example of the species.
Depositional Environment:
During the Callovian, the Montreuil Bellay region was part of a shallow marine environment with alternating marl and limestone beds. These deposits provided excellent conditions for ammonite preservation.
Scientific & Collecting Importance:
Orionoides pseudorion is a significant ammonite species for biostratigraphic correlation within the Callovian. Its diagnostic ribbing and shell morphology make it an important index fossil and a highly desirable specimen for collectors.
Why Buy This Fossil?
- A rare ammonite species from the Callovian of France.
- Excellent preservation with clear ribbing and detail.
- A valuable addition for collectors of Jurassic ammonites or European fossil material.
- Supplied with a Certificate of Authenticity guaranteeing its provenance.
All of our fossils are responsibly sourced, carefully prepared, and chosen for quality.
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