Erymnoceras leuthardi Ammonite Fossil Jurassic Calvados France Genuine Authentic COA

Description

Authentic Jurassic Fossil from Calvados, France

This fine Erymnoceras leuthardi ammonite fossil is a genuine specimen from the Middle Callovian stage of the Jurassic Period, discovered in Calvados, Normandy, France. Carefully chosen for its quality and preservation, this ammonite offers both scientific significance and visual appeal. The photographs show the actual specimen you will receive, with a 1 cm scale cube provided for accurate sizing. Each purchase is accompanied by a Certificate of Authenticity, guaranteeing that the fossil is 100% genuine.

Geological Age and Provenance

Formed approximately 165–163 million years ago, during the Middle Callovian stage of the Jurassic, this ammonite originates from marine sediments deposited in what was once a shallow sea covering parts of modern-day France. The Calvados region of Normandy is world-famous for its Callovian ammonite-bearing strata, which have yielded many scientifically important specimens. These fossil-rich marine deposits preserve ammonites in remarkable detail, helping paleontologists refine the Jurassic timescale and reconstruct ancient ecosystems.

Species Identification and Classification

Erymnoceras leuthardi belongs to the class Cephalopoda, order Ammonitida, superfamily Stephanoceratoidea, and family Stephanoceratidae. Ammonites of the genus Erymnoceras are known for their robust, planispiral shells with distinctive ribbing and ornamentation. The species leuthardi is particularly significant within Callovian ammonite faunas, occurring in well-defined horizons that are used in stratigraphy to identify specific biozones. Fossils of this type are highly prized by collectors due to their rarity and their importance in Jurassic paleontology.

Morphology and Distinctive Traits

This specimen exhibits the diagnostic features of Erymnoceras leuthardi. The shell is robust and strongly ribbed, with bold ornamentation across the whorls. Ribs extend symmetrically across the shell flanks, and the whorls themselves are relatively inflated, giving the ammonite a strong, defined appearance. These traits are characteristic of the Stephanoceratidae family, reflecting adaptations that strengthened the shell and influenced the animal’s buoyancy and movement in Jurassic seas. The preserved detail makes this specimen not only scientifically valuable but also aesthetically striking.

Scientific and Stratigraphic Importance

Ammonites such as Erymnoceras leuthardi play a key role in stratigraphy as they are excellent index fossils. Their presence allows geologists to date and correlate Middle Jurassic rock layers with high precision. In particular, Erymnoceras species are associated with the Middle Callovian biozones that are used throughout Europe to refine the Jurassic stratigraphic framework. These fossils are central to understanding evolutionary trends in cephalopods and to reconstructing marine environments of the Callovian stage. Collectors value them not only for their rarity but also for their pivotal role in paleontological research.

Condition and Presentation

The fossil has been carefully prepared to highlight its natural beauty and preserve its important features. The ribbing, whorl structure, and shell curvature are clearly visible, making this a fine and representative example of the species. This is a one-of-a-kind specimen—not a cast or reproduction. The images provided show the exact ammonite you will receive, ensuring full transparency and confidence in your purchase.

Guarantee of Authenticity

All of our fossils are 100% genuine, responsibly sourced, and scientifically identified. Each specimen comes with a Certificate of Authenticity to verify its provenance. This Erymnoceras leuthardi ammonite fossil from Calvados, France, is a rare and scientifically significant piece of Jurassic natural history, making it a superb addition for fossil collectors, natural history enthusiasts, and educational collections.