RARE Osperlioceras reniquieri Fossil Ammonite Jurassic Upper Toarcian France Genuine Specimen

Description

Rare Osperlioceras reniquieri Fossil Ammonite from France

This listing presents a rare and genuine Osperlioceras reniquieri Fossil Ammonite, originating from the Upper Toarcian stage of the Jurassic period, discovered in the famous fossil deposits of T de Balduce, France. With its finely preserved coiling and striking suture lines, this ammonite exemplifies the beauty and scientific importance of Jurassic cephalopods. Collectors and researchers alike value this species for its rarity, diagnostic features, and role in Jurassic stratigraphy.

Each fossil we supply is carefully selected, and the photographs provided show the exact specimen you will receive. The 1 cm scale cube included ensures accurate size reference. All fossils are guaranteed 100% genuine specimens and are supplied with a Certificate of Authenticity.

Geological Age and Provenance

This ammonite dates to the Upper Toarcian stage of the Early Jurassic, approximately 178 – 175 million years ago. The Toarcian seas of southern France were shallow marine environments, where fine silts and muds accumulated, entombing ammonites and other marine life under conditions that preserved them in extraordinary detail.

The fossil deposits of T de Balduce are especially renowned for yielding exceptionally well-preserved ammonites. These beds have contributed significantly to the understanding of Jurassic marine faunas and serve as classic reference points for ammonite evolution and biozonation.

Scientific Classification and Identification

This specimen has been identified as Osperlioceras reniquieri, a member of the family Lytoceratidae, within the superfamily Lytoceratoidea and the order Ammonitida. Ammonites of this lineage are recognised for their evolute shells and complex suture lines, which provide a wealth of diagnostic features for paleontologists.

Osperlioceras reniquieri is an important species within the Upper Toarcian sequence and is used as a biostratigraphic marker in European Jurassic deposits. Its presence in the fossil record helps establish accurate correlations between different localities, making it scientifically valuable in addition to its natural beauty.

Morphology and Distinctive Features

The shell morphology of Osperlioceras reniquieri is characterised by:

• Evolute coiling, where all whorls are exposed and visible.
• Complex suture patterns, with deep lobes and high saddles forming ornate designs across the shell.
• Balanced whorl proportions, providing a symmetrical and elegant form.

These structural traits gave the ammonite excellent buoyancy control and stability in Jurassic seas, allowing it to thrive as an active predator or opportunistic feeder. The fine details of its sutures and the strength of its shell make this specimen both scientifically and aesthetically remarkable.

Depositional Environment

The Upper Toarcian sediments of T de Balduce represent shallow marine conditions in the Jurassic seas of southern France. These calm depositional environments supported thriving ecosystems, including ammonites, belemnites, marine reptiles, and bivalves. The preservation of ammonites like Osperlioceras reniquieri owes much to rapid burial in fine-grained sediment, often under oxygen-limited conditions, which protected shells from decay and distortion.

Collectible and Scientific Importance

As a rare species of ammonite, Osperlioceras reniquieri is a prized specimen for fossil collectors. Its scientific role in Jurassic stratigraphy adds further significance, as it serves as an index fossil for the Upper Toarcian stage. For collectors, this fossil offers not only a tangible link to life nearly 180 million years ago but also a specimen of remarkable beauty and rarity.

Key Features of This Fossil

• Rare Osperlioceras reniquieri ammonite from T de Balduce, France
• Jurassic (Upper Toarcian stage), approx. 178 – 175 million years old
• Member of the Lytoceratidae family, with ornate and diagnostic suture patterns
• From a classic French locality, important for Jurassic stratigraphy
• Supplied with a Certificate of Authenticity
• The exact specimen pictured is the one you will receive

This Osperlioceras reniquieri Fossil Ammonite is a rare and scientifically valuable specimen that embodies the elegance and diversity of Jurassic marine life, making it an exceptional addition to any fossil collection.