Description
Genuine Streblites tenuilobatus Ammonite Fossil
This is a genuine Streblites tenuilobatus ammonite fossil from the Upper Jurassic, Kimmeridgian Stage, collected from Alter Staffelberg, Bavaria, Germany. This carefully chosen fossil specimen is an attractive and scientifically interesting piece for collectors of German ammonites, Upper Jurassic fossils, extinct marine cephalopods, natural history specimens, and well-labelled palaeontological display fossils.
The photograph shows the actual fossil you will receive, allowing you to view the individual preservation, shell form, surface detail, colour, matrix, and natural character of this specific specimen before purchase. Full sizing details can be seen in the photo. This fossil includes a Certificate of Authenticity lifetime guarantee generic card, confirming it as a genuine specimen.
Fossil Type, Species and Scientific Classification
Streblites tenuilobatus is an ammonite, an extinct marine cephalopod belonging to the order Ammonitida. Ammonites were related to modern squid, cuttlefish, octopus, and nautilus, and are among the most recognisable fossils of the Jurassic Period. Their coiled shells, chambered internal structure, varied ornamentation, and rapid evolutionary development make them highly valued by collectors and important in palaeontology.
This fossil belongs to the genus Streblites and the species Streblites tenuilobatus. Streblites is commonly associated with finely formed Upper Jurassic ammonite faunas and is often placed among oppeliid ammonites, a group known for compressed shell forms, elegant coiling, refined ornamentation, and detailed suture patterns. The species name tenuilobatus is associated with slender or finely lobed features, reflecting the importance of shell and suture detail in ammonite classification.
Geological Age and Kimmeridgian Context
This specimen dates from the Kimmeridgian Stage of the Upper Jurassic, approximately 157 to 152 million years ago. The Kimmeridgian was a time of widespread marine environments across Europe, with ammonites forming an abundant and diverse part of ancient sea ecosystems. Because ammonites evolved quickly and were widely distributed, many species are useful for comparing and dating Jurassic sedimentary rocks.
During the Kimmeridgian, ammonites such as Streblites tenuilobatus lived as active swimming marine animals. Their shells were divided into internal chambers, with the living animal occupying the outer body chamber. This chambered shell helped regulate buoyancy in the water column, allowing ammonites to move through Jurassic seas before their shells eventually settled onto the sea floor after death.
Alter Staffelberg, Bavaria, Germany Locality
This fossil comes from Alter Staffelberg in Bavaria, Germany, a classic European Jurassic locality associated with fossil-bearing marine sedimentary rocks. German Jurassic ammonites are highly collectable because they often come from well-studied geological settings with strong scientific context, attractive preservation, and precise locality information.
During the Upper Jurassic, parts of what is now Bavaria were covered by marine environments connected to broader European seas. Carbonate-rich sediments, limestones, marls, and sea-floor deposits helped preserve the remains of ancient marine organisms. These environments supported ammonites, belemnites, bivalves, brachiopods, gastropods, echinoids, and other invertebrates. Over millions of years, mineralisation, compaction, and natural geological alteration preserved some shells as fossils within the sedimentary rock record.
Ammonite Morphology and Natural Features
Streblites tenuilobatus displays the classic planispiral ammonite shell form, with the shell coiled in a flat spiral. The whorls represent successive growth stages as the animal matured. Ammonites of this type are often admired for their balanced spiral outline, compressed whorl profile, neat coiling, and subtle to refined ornamentation.
Depending on preservation, this fossil may show whorl shape, fine ribbing or striation, shell curvature, a narrow umbilicus, natural mineral staining, matrix attachment, surface wear, or fossilisation texture. The outer shell shape, whorl proportions, ornament pattern, and suture structure are important features used in ammonite comparison and identification.
Natural details such as small fractures, sedimentary contact marks, worn areas, colour variation, mineral deposits, and matrix are part of the fossil’s geological history. These characteristics add individuality to the specimen and help distinguish a genuine natural fossil from a modern cast or replica.
Collecting, Display and Educational Interest
This Streblites tenuilobatus ammonite fossil is well suited for display in a fossil cabinet, study, classroom, office, collection drawer, natural history arrangement, or Upper Jurassic fossil collection. Its named species identification, Kimmeridgian age, German origin, and classic ammonite form give it strong collecting appeal.
It is suitable for collectors interested in German fossils, Jurassic ammonites, extinct cephalopods, marine invertebrates, palaeontology, geology, educational fossil specimens, and natural history display pieces. The natural coiled shell form gives the fossil immediate visual impact, while the species name, geological age, and Alter Staffelberg locality provide valuable scientific context for anyone interested in prehistoric marine environments.
Authenticity and Specimen Details
This is a genuine Streblites tenuilobatus ammonite fossil from the Upper Jurassic, Kimmeridgian Stage, Alter Staffelberg, Bavaria, Germany. It includes a Certificate of Authenticity lifetime guarantee generic card. The photo shows the actual fossil you will receive, and full sizing information can be seen in the photo.
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