Description
Genuine Fehlmannites sp. Ammonite Fossil
This listing is for a genuine Fehlmannites sp. ammonite fossil from the famous Oxford Clay Formation, dating to the Upper Jurassic, Oxfordian Stage, specifically the Mariae Zone. The specimen comes from Warboys Clay Pit, near Peterborough, Cambridgeshire, UK, a classic British Jurassic fossil locality known for marine fossils from the ancient Oxford Clay sea.
This is a carefully chosen fossil specimen, ideal for collectors of British fossils, Jurassic ammonites, Oxford Clay fossils, fossil cephalopods, prehistoric marine life, natural history specimens, and educational geology displays. The photograph shows the actual fossil specimen you will receive, so the colour, shape, preservation, surface detail, and natural fossil character shown in the image belong to this exact piece. For full sizing, proportions, and scale, please see the photo.
Fossil Type and Scientific Interest
This fossil is an ammonite, an extinct marine cephalopod related to modern squid, cuttlefish, octopus, and nautilus. Ammonites are among the most recognisable fossils of the Jurassic Period, admired for their coiled shells, chambered internal structure, varied ornamentation, and importance in dating ancient marine rock layers.
The specimen is identified as Fehlmannites sp., meaning it belongs to the genus Fehlmannites, while the exact species is not specified. This is a useful palaeontological identification when the genus can be recognised, but species-level placement may depend on fine details of shell form, sutures, whorl shape, ornamentation, or preservation.
As with other ammonites, Fehlmannites had a planispirally coiled shell divided internally into chambers by septa. The living animal occupied the final outer body chamber, while the earlier chambers helped regulate buoyancy in the water column. Depending on preservation, specimens may show curved whorl development, shell relief, natural mineralisation, subtle ribbing, growth features, and surface texture. These characteristics make the fossil both attractive for display and valuable as a labelled study specimen.
Oxford Clay Formation and Mariae Zone
This specimen comes from the Oxford Clay Formation, one of the most famous Jurassic marine formations in the UK. The Oxford Clay was deposited in a warm, shallow to moderately deep marine environment during the Jurassic Period, when much of what is now Britain was covered by sea.
The fossil is from the Oxfordian Mariae Zone, an important ammonite biozone used in Jurassic biostratigraphy. Ammonite zones are valuable because ammonites evolved rapidly and were widely distributed, allowing geologists to correlate rock layers across different localities. A fossil with this level of geological information is especially desirable for collectors who value accurate provenance and scientific context.
Upper Jurassic Oxfordian Age
This ammonite dates from the Upper Jurassic, Oxfordian Stage, approximately 163 to 157 million years old. During this time, the Oxford Clay sea supported a rich ecosystem of ammonites, belemnites, marine reptiles, fish, bivalves, gastropods, brachiopods, crinoids, and other marine organisms.
The clay-rich sediments of the Oxford Clay Formation were well suited to preserving fossils. Shells and hard parts could become buried in fine muds on the sea floor, where mineralisation and compaction over millions of years turned them into fossils. This specimen is a direct link to the marine life that inhabited Britain during the Jurassic Period.
Warboys Clay Pit, Cambridgeshire Locality
This fossil was collected from Warboys Clay Pit, near Peterborough, Cambridgeshire, UK, a locality associated with Oxford Clay fossil material. Fossils from this region are popular with collectors because they represent classic British Jurassic geology and carry strong locality appeal.
British Oxford Clay fossils are highly collectable due to their scientific history, educational value, and connection to some of the most important Jurassic marine deposits in Europe. A fossil with clear formation, stage, biozone, and locality information is far more useful than an unlabelled decorative ammonite, making this specimen suitable for a well-organised fossil collection or teaching display.
Natural Collector Display Specimen
This Fehlmannites sp. ammonite fossil is suitable for collectors of Jurassic fossils, British fossils, Oxford Clay Formation fossils, ammonites, fossil cephalopods, and scientifically labelled natural history specimens. It would display well in a fossil cabinet, educational geology set, study collection, curiosity cabinet, or prehistoric marine life display.
As with all genuine fossils, the specimen may show natural features such as clay matrix, mineral staining, surface texture, small cracks, weathering, repaired areas, compression, or variations in preservation. These characteristics are normal in authentic fossils and form part of the specimen’s geological history and natural appeal.
Certificate of Authenticity Included
This fossil is a genuine specimen and includes a Certificate of Authenticity lifetime guarantee generic card. This provides reassurance that the fossil supplied is authentic and suitable for collecting, study, gifting, display, resale, or educational use.
You will receive the exact Fehlmannites sp. ammonite fossil shown in the photo, from the Oxford Clay Formation, Upper Jurassic Oxfordian Mariae Zone, Warboys Clay Pit near Peterborough, Cambridgeshire, UK.
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