Description
Genuine Desmoceras zurcheri Ammonite Fossil
This genuine ammonite fossil is identified as Desmoceras zurcheri and comes from the Rhône region of France. It dates to the Upper Barremian of the Lower Cretaceous and is a carefully chosen European specimen with valuable species, geological age, and regional provenance. The photographs show the actual fossil offered for sale, so the ammonite pictured is the exact specimen you will receive.
Upper Barremian Lower Cretaceous Age
The Barremian is a stage of the Early Cretaceous Period, spanning approximately 129 to 125 million years ago. This fossil comes from the later part of that interval. During the Barremian, warm seas covered extensive areas of southern Europe and the Tethyan realm. Marine communities included ammonites, belemnites, bivalves, gastropods, fish, and other organisms adapted to open-water and sea-floor environments.
After death, an ammonite shell could settle on the sea floor and become buried by fine sediment. Compaction, mineral replacement, and geological uplift preserved the shell or its internal mould as a fossil. The documented Upper Barremian age gives this specimen a clear position within the Lower Cretaceous marine succession.
Desmoceras zurcheri
Desmoceras was an extinct marine cephalopod with a coiled shell divided internally into chambers. The living animal occupied the final body chamber, while older sealed chambers assisted with buoyancy control. Ammonites were relatives of modern squid, cuttlefish, and nautiluses, although they formed their own highly diverse and now extinct group.
Desmoceratid ammonites are generally recognised by comparatively smooth, compressed to moderately inflated shells with subtle ribs, constrictions, or growth lines. Their elegant whorl form contrasts with the strongly tuberculate ornament seen in many other Cretaceous ammonites. Examine the photographs for the shell outline, whorl proportions, umbilical region, gentle ornament, natural matrix, and preserved surface details visible on this individual Desmoceras zurcheri.
Scientific and Stratigraphic Interest
Ammonites evolved relatively rapidly and were widely distributed through ancient oceans. Their changing shell forms make them valuable index fossils, allowing geologists to compare sedimentary sequences and establish relative ages. Desmoceras and related genera contribute to understanding Lower Cretaceous ammonite evolution, marine connections, and palaeogeography.
An ammonite shell grew by adding progressively larger chambers around the outer whorl. Internal septa met the shell wall along complex suture lines, strengthening the chambered structure. Differences in whorl shape, umbilical width, ornament, and suture patterns help palaeontologists distinguish species and interpret growth.
Rhône Geological Provenance
The Rhône region lies within southeastern France, an area celebrated for extensive Lower Cretaceous marine rocks associated with the ancient Tethys Ocean. Sedimentary basins in and around this part of France preserve rich ammonite faunas that are internationally important for biostratigraphy. These fossils document changing sea conditions and marine life during the Early Cretaceous.
A specimen with documented Rhône provenance carries more collecting and educational context than an entirely unlocalised fossil. It can complement a collection arranged by European country, French region, geological stage, ammonite genus, or ancient marine environment.
Natural Fossil Character
Natural colour, mineral texture, small breaks, areas of wear, and differences in preservation reflect the fossil’s long geological history. These are expected features of an authentic specimen rather than manufacturing defects. Every ammonite preserves a different balance of original shell, mineral replacement, internal mould, and surrounding rock, giving each piece unique character.
The multiple photographs show this exact Desmoceras zurcheri from useful angles. They allow close inspection of its condition, outline, subtle ornament, 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 specimen.
Certificate of Authenticity
This genuine fossil includes a generic Certificate of Authenticity card with a lifetime guarantee. Its Upper Barremian age, French provenance, elegant desmoceratid shell form, and authentic natural preservation make it a distinctive addition to a fossil cabinet, study collection, office display, or educational setting. It is also a thoughtful gift for anyone interested in French fossils, Lower Cretaceous geology, ammonite evolution, palaeontology, or genuine natural history specimens.
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