Description
Rare Neoprionoceras rauracum Ammonite Fossil
This listing features a rare Neoprionoceras rauracum ammonite fossil from the Callovian stage of the Jurassic period, dating back around 166 – 163 million years ago. Discovered in the fossil-rich deposits of Segenthal, Bavaria, Germany, this specimen represents an important and scientifically valuable ammonite species from the mid-Jurassic seas of Europe. Its combination of age, preservation, and locality makes it a highly collectible piece, sought after by both professional and amateur fossil enthusiasts.
The ammonite pictured is the exact specimen you will receive, photographed alongside a 1 cm scale cube for accurate sizing. Each fossil in our collection is carefully chosen for its quality, preservation, and historical significance. As always, this specimen is guaranteed genuine and comes with a Certificate of Authenticity.
Geological Context
The fossil originates from the Callovian stage, a subdivision of the Middle Jurassic epoch, a time when Europe was largely covered by shallow epicontinental seas. These seas were home to diverse marine life, with ammonites being one of the most abundant and ecologically important groups.
The deposits of Segenthal, Bavaria are renowned for their excellent preservation of ammonites and other marine invertebrates. Fine sedimentation in these shallow marine environments allowed for the exquisite fossilisation of organisms, often capturing fine details of shell morphology. Such conditions make Bavaria one of the most important fossil localities for Jurassic ammonites in Europe.
Scientific Classification
- Genus: Neoprionoceras
- Species: Neoprionoceras rauracum
- Order: Ammonitida
- Superfamily: Stephanoceratoidea
- Family: Stephanoceratidae
- Age: Jurassic, Callovian (166 – 163 million years ago)
- Locality: Segenthal, Bavaria, Germany
Morphological Features
The genus Neoprionoceras is recognised for its distinctive shell architecture and striking ribbing:
- Strongly ribbed shell, with bold ornamentation running across the whorls.
- Typically compressed, evolute coiling, leaving inner whorls exposed.
- Prominent tubercles and nodes, often present along the flanks, providing both structural reinforcement and ornamental appeal.
- Complex suture lines, highly characteristic of mid-Jurassic ammonites, reflecting the sophisticated chambered structure used for buoyancy regulation.
This combination of morphological traits makes Neoprionoceras both a scientifically important taxon and an aesthetically striking fossil.
Paleoecology and Significance
Ammonites such as Neoprionoceras were fast-moving marine predators and opportunistic feeders. Their chambered shells allowed precise buoyancy control, enabling them to occupy various depths of the water column. They are believed to have preyed upon small crustaceans, molluscs, and other marine organisms.
As members of the Stephanoceratidae, Neoprionoceras species are crucial for biostratigraphy, serving as index fossils that help geologists correlate Jurassic rock layers across different regions. Their presence in the Callovian strata of Bavaria contributes to a detailed understanding of Jurassic marine environments and evolutionary patterns within ammonites.
Collector’s Value
This Neoprionoceras rauracum ammonite is a superb specimen from one of Europe’s most famous fossil regions. Its distinct ribbing, well-preserved structure, and geological context make it a highly desirable piece for fossil collectors, museums, and enthusiasts of natural history.
The fossil not only offers scientific and historical value but also stands as a striking natural display item. Its features are easily appreciated by both specialist collectors and those looking for an impressive and authentic piece of Earth’s history to own.
Key Details
- Species: Neoprionoceras rauracum
- Age: Jurassic, Callovian (166 – 163 million years ago)
- Locality: Segenthal, Bavaria, Germany
- Family: Stephanoceratidae
- Features: Strong ribbing, tuberculation, evolute shell, complex sutures
- Certificate of Authenticity included
- Exact specimen photographed with 1 cm scale cube
This rare Neoprionoceras rauracum ammonite fossil offers a remarkable glimpse into the marine ecosystems of the Jurassic seas and is an exceptional addition to any fossil collection.
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