Morrisiceras sphaera Ammonite Fossil Jurassic Bourges France Genuine Authentic COA

Description

Authentic Jurassic Fossil from Bourges, France

This Morrisiceras sphaera ammonite fossil is a genuine specimen from the Lower Callovian stage of the Middle Jurassic, discovered near Bourges, France. Selected for its distinct preservation and scientific value, it provides a fascinating glimpse into the marine ecosystems that thrived over 165 million years ago. The photographs show the exact fossil you will receive, with a 1 cm scale cube included for accurate size reference. Each specimen is accompanied by a Certificate of Authenticity, confirming that it is 100% genuine.

Geological Age and Provenance

This ammonite dates to the Lower Callovian stage of the Jurassic Period, approximately 166–163 million years ago. During this time, much of what is now France was covered by shallow epicontinental seas connected to the vast Tethys Ocean. Fine-grained sediments settled on the sea floor, entombing marine creatures and preserving them in exceptional detail. The Bourges region is particularly rich in Callovian ammonites, making it an important locality for paleontological research and fossil collecting.

Species Identification and Classification

Morrisiceras sphaera belongs to the class Cephalopoda, order Ammonitida, and family Perisphinctidae. The genus Morrisiceras is an important group of Callovian ammonites, recognised for their robust shells and characteristic ribbing patterns. The species sphaera is highly regarded among Jurassic ammonites for its role in refining the zonal biostratigraphy of the Lower Callovian. Its occurrence in specific horizons allows geologists to date and correlate marine strata across Europe, underscoring its scientific significance.

Morphology and Distinctive Traits

This specimen shows the defining traits of Morrisiceras sphaera. Its shell is tightly coiled in a planispiral form with compressed whorls and strong ribbing that radiates symmetrically across the flanks. The ribs are regular and prominent, occasionally bifurcating near the outer whorl, creating a striking ornamentation pattern. These structural adaptations not only reinforced the shell but also contributed to hydrodynamic stability in the marine environment. The overall appearance of this ammonite is both bold and elegant, making it a desirable specimen for collectors.

Scientific and Stratigraphic Importance

As a key Callovian ammonite, Morrisiceras sphaera is widely used as an index fossil. Its distinctive morphology and stratigraphic range allow paleontologists to establish precise correlations between Jurassic rock layers. The presence of this species in Bourges highlights the area’s importance in the geological record, as it provides insights into faunal distribution and evolutionary trends during the Middle Jurassic. For collectors, this specimen represents not only an attractive fossil but also an ammonite of real scientific importance, tied directly to the construction of the Jurassic timescale.

Condition and Presentation

This fossil has been professionally prepared to display its natural features. The ribbing, whorl structure, and shell form are all clearly visible, making it an excellent representative of the species. It is a unique, one-of-a-kind piece, not a cast or reproduction. The images provided show the actual ammonite you will receive, ensuring complete confidence and transparency in your purchase.

Guarantee of Authenticity

All of our fossils are 100% genuine, responsibly sourced, and scientifically identified. Each specimen is supplied with a Certificate of Authenticity. This Morrisiceras sphaera ammonite fossil from Bourges, France, is a scientifically valuable and visually striking example of Jurassic marine life, making it an outstanding addition for fossil collectors, natural history enthusiasts, and educational displays.