Description
Rare Jurassic Ammonite from Sengenthal, Germany
This exceptional Oxyceratites limosus ammonite fossil originates from Sengenthal, Germany, a locality renowned for its richly fossiliferous Jurassic deposits. Dating to the Lower Bathonian stage of the Middle Jurassic, approximately 168–166 million years ago, this specimen represents a fascinating period of marine evolution. Carefully selected for its quality and preservation, this fossil offers both strong scientific relevance and striking display appeal.
Geological Age and Depositional Environment
The Lower Bathonian marks an important interval within the Middle Jurassic, characterised by widespread shallow seas across Europe. During this time, southern Germany was submerged beneath warm, tropical marine waters, creating ideal conditions for ammonites and other marine organisms to flourish.
The fossil-bearing strata of Sengenthal are typically composed of fine limestones and marls, deposited in relatively calm offshore environments. These sediments accumulated gradually, allowing for the preservation of delicate shell structures. Periods of reduced oxygen at the seabed further contributed to the exceptional fossilisation seen in specimens from this region.
Ammonites from the Bathonian are particularly important for stratigraphic studies, as they evolved rapidly and are widely distributed, making them valuable index fossils for dating geological layers.
Species and Taxonomic Classification
Oxyceratites limosus belongs to the order Ammonitida and is part of the family Oppeliidae within the superfamily Haploceratoidea. This group of ammonites is well known for its streamlined shell forms and relatively smooth ornamentation compared to earlier Jurassic species.
The genus Oxyceratites is characteristic of the Bathonian stage and is often associated with specific biozones used in detailed stratigraphic correlation. Its presence in the fossil record provides valuable insight into the evolutionary developments of ammonites during the Middle Jurassic.
Morphology and Distinctive Features
This specimen displays a refined and elegant shell form typical of Oxyceratites limosus. The shell is moderately involute, with whorls that partially envelop earlier coils, creating a compact and balanced appearance. Unlike heavily ornamented ammonites of earlier periods, this species often exhibits smoother flanks with subtle ribbing or growth lines.
A defining feature is the presence of a distinct keel along the venter, which may have contributed to hydrodynamic efficiency as the animal moved through the water. The overall shell shape is more streamlined, reflecting evolutionary adaptations toward more efficient swimming in open marine environments.
The fossil retains excellent natural detail, with clear whorl definition and a well-preserved overall structure. Its aesthetic simplicity and symmetry make it particularly attractive as a display piece.
Authenticity and Presentation
This is a genuine fossil specimen, not a reproduction or cast. It has been carefully chosen for its quality, authenticity, and visual appeal. The photograph provided shows the exact ammonite you will receive, ensuring full transparency and confidence in your purchase.
Included with the specimen is a Certificate of Authenticity lifetime guarantee card, confirming its legitimacy and geological origin. This adds assurance for collectors and enhances the long-term value of the piece.
A Distinctive Collector’s Fossil
Ammonites from the Bathonian of Germany are highly regarded for their preservation and scientific importance. Oxyceratites limosus represents a more advanced stage in ammonite evolution, where shell forms became more streamlined and refined.
This specimen offers a tangible connection to the ancient Jurassic seas, preserved for over 160 million years. Its combination of geological significance, natural beauty, and authentic provenance makes it an excellent addition to any fossil collection, educational display, or natural history portfolio.
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