Berbericeras sekikense Ammonite Fossil Jurassic Germany with COA

Description

Genuine Berbericeras sekikense Ammonite Fossil

This genuine ammonite fossil is identified as Berbericeras sekikense and comes from Sengenthal in Bavaria, Germany. It dates to the Lower Bathonian stage of the Middle Jurassic. The photographs show the actual carefully selected fossil offered for sale, so the ammonite pictured is the exact specimen you will receive.

Lower Bathonian Middle Jurassic Age

The Bathonian is a stage of the Middle Jurassic Period, dating to approximately 168 to 166 million years ago. This specimen comes from the earlier part of that interval. During the Bathonian, shallow to moderately deep seas covered parts of central Europe and supported ammonites, belemnites, bivalves, gastropods, brachiopods, echinoids, and other marine organisms.

After death, an ammonite shell could settle onto the seabed and become buried by carbonate-rich mud, marl, or other marine sediment. Compaction, mineral replacement, and lithification preserved the shell or its internal mould. Later uplift, erosion, and quarrying exposed the fossil-bearing Jurassic rocks of Bavaria.

Berbericeras sekikense

Berbericeras was an extinct marine cephalopod with a planispirally coiled shell divided internally into chambers. The living animal occupied the final body chamber, while earlier sealed chambers helped regulate buoyancy. Ammonites were relatives of modern squid, cuttlefish, and nautiluses, although they formed their own diverse and now extinct group.

Fossil specialists distinguish ammonites by comparing shell shape, whorl breadth, umbilical width, ribbing, tubercles, constrictions, and the form of the outer edge. Berbericeras specimens can show evolute coiling with a clearly visible umbilicus and strong ribs crossing the flanks. Examine the photographs for the whorls, rib pattern, umbilical area, ventral margin, natural matrix, and individual preservation visible on this Berbericeras sekikense fossil.

Ammonites and Geological Dating

Ammonites evolved rapidly and were widely distributed through Jurassic seas. Their changing shell forms make them valuable index fossils, enabling geologists to compare marine rock sequences and determine relative ages. Bathonian ammonite assemblages help subdivide Middle Jurassic strata and correlate sedimentary successions across Europe and beyond.

A specimen identified to species, stage interval, and documented locality carries richer geological context than one described only as broadly Jurassic. It can be compared with related ammonites to illustrate evolutionary succession, geographical distribution, and diversity within Middle Jurassic marine communities.

Jurassic Marine Environment

During the Bathonian, carbonate mud, marl, limestone, and fine clastic sediment accumulated across European shelf seas. Changes in water depth, currents, oxygenation, biological productivity, and sediment supply influenced both the animals living in the water column and the conditions under which their remains were preserved.

The chambered shell illustrates adaptation in a free-swimming marine cephalopod. Its construction combined strength with buoyancy control, while ribs and shell form may have reinforced the shell and affected movement through the water. Each fossil preserves a unique balance of original shell, mineral replacement, internal mould, surrounding matrix, and later weathering.

Sengenthal Bavaria Provenance

Sengenthal lies in Bavaria within southern Germany, a region internationally famous for richly fossiliferous Jurassic rocks. Quarries and natural exposures reveal marine sedimentary successions containing ammonites and many associated invertebrates. A documented Sengenthal provenance adds geographical, scientific, and educational value to this specimen.

This fossil can complement a collection arranged by German locality, geological stage, ammonite genus, fossil group, or ancient marine environment. Its Bavarian origin also makes it a useful counterpart to Middle Jurassic ammonites from Britain, France, North Africa, and other parts of the former Tethyan and European shelf seas.

Natural Fossil Character

Natural colour, mineral texture, small breaks, areas of wear, and variations in preservation are expected features of an authentic fossil rather than manufacturing defects. They reflect burial, mineralisation, rock formation, uplift, excavation, and weathering over immense geological time. No two ammonites preserve exactly the same combination of detail.

The multiple photographs show this exact Berbericeras sekikense specimen from useful angles. They allow close inspection of its condition, coiling, ribbing, matrix, proportions, and display qualities. Full sizing is shown in the photographs, which provide the clearest scale information for this individual fossil. The images are not stock photographs and do not represent a similar item.

Certificate of Authenticity

This genuine fossil includes a generic Certificate of Authenticity card with a lifetime guarantee. Its Lower Bathonian age, detailed ammonite identity, and Sengenthal provenance make it an appealing addition to a fossil cabinet, study collection, office display, or educational setting. It is also a thoughtful gift for anyone interested in German fossils, Middle Jurassic geology, ammonite evolution, Bavarian palaeontology, or authentic natural history specimens.