Fossil Ammonite Berniceras Genuine Jurassic Callovian Germany Authentic Specimen

Description

Genuine Fossil Ammonite – Berniceras

This listing is for a rare and scientifically valuable Fossil Ammonite of the genus Berniceras, dating from the Callovian stage of the Middle Jurassic Period, discovered at Segenthal, Bavaria, Germany. At around 166–161 million years old, this ammonite provides a direct link to the rich marine ecosystems of the Jurassic seas that once covered central Europe. Beautifully preserved and carefully chosen, this specimen makes a superb addition for collectors, researchers, or anyone fascinated by ancient natural history.

The Genus – Berniceras

Berniceras belongs to the Order Ammonitida, Superfamily Stephanoceratoidea, and Family Perisphinctidae. Ammonites in this genus are recognised for their coiled, ribbed shells with distinctive ornamentation and strong ribbing that often bifurcates as it extends across the whorls. These features reflect adaptations to the marine environments in which they lived and provide key identifying traits used by paleontologists in species classification. The genus is significant for biostratigraphy, as it is closely tied to specific biozones within the Callovian stage, allowing geologists to correlate rock layers across wide regions.

Geological Context – Callovian Stage, Jurassic Period

This specimen originates from the Callovian stage of the Middle Jurassic, approximately 166–161 million years ago. The fossil beds of Segenthal, Bavaria are part of a well-known sequence of Jurassic marine deposits that have yielded ammonites, belemnites, brachiopods, and marine reptiles. These deposits were laid down in a shallow sea that formed part of the European epicontinental seaway, an extension of the Tethys Ocean. Fine sediments preserved the ammonites in excellent condition, capturing intricate shell details that can still be seen today.

Morphological Features of the Fossil

This Berniceras ammonite fossil displays the classic features of the genus:

• Planispiral shell form, tightly coiled with a symmetrical structure.
• Strong ribbing across the whorls, sometimes branching toward the outer edges.
• Slightly compressed cross-section, producing an elegant yet robust profile.
• Sutures visible along the shell, showing the intricate junctions between chambers that reflect evolutionary adaptations for buoyancy control.

The photographs include a 1 cm scale cube for accurate measurement reference. The specimen shown is the exact fossil you will receive, selected for both its preservation and its geological importance.

Scientific Importance

Ammonites such as Berniceras are crucial in paleontology because they are used as index fossils, helping scientists to identify and date Jurassic rock formations. The presence of Berniceras is closely associated with specific Callovian ammonite zones, making them essential for refining the Jurassic geological timescale. Their wide distribution and rapid evolutionary turnover make them indispensable in the study of stratigraphy.

Provenance and Authenticity

• Genus: Berniceras
• Age: Callovian, Middle Jurassic (~166–161 million years old)
• Locality: Segenthal, Bavaria, Germany
• Family: Perisphinctidae
• Superfamily: Stephanoceratoidea
• Order: Ammonitida

Every fossil is guaranteed to be 100% genuine and is accompanied by a Certificate of Authenticity, ensuring peace of mind and confidence in its provenance.

Why This Fossil is Exceptional

• A rare and scientifically significant ammonite from the Callovian stage.
• Sourced from the renowned fossil beds of Segenthal, Bavaria.
• Displays the characteristic ribbing and coiling of Berniceras.
• Supplied with a Certificate of Authenticity, guaranteeing authenticity and provenance.

This Berniceras ammonite fossil is a superb collector’s piece, offering a unique opportunity to own an authentic relic from the Jurassic seas of Germany, combining scientific value with natural elegance.