Description
Genuine Planisphinctes Ammonite Fossil
This is a genuine Planisphinctes sp. ammonite fossil from the Lower Bathonian Stage of the Middle Jurassic. It was collected in Calvados, Normandy, France, a region well known for fossil-bearing Jurassic marine rocks. The photographs show the actual specimen offered for sale, so the natural shell form, colour, matrix, preservation and geological details visible in the images belong to the fossil you will receive.
Geological Age and Locality
The Bathonian Stage forms part of the Middle Jurassic and dates to approximately 168 to 166 million years ago. During this interval, much of north-western Europe was covered by warm shallow seas. Sediment accumulated on the seabed and occasionally buried ammonite shells before they were destroyed. Over millions of years, compaction, mineral-rich water and geological change preserved those remains as fossils.
Calvados lies in Normandy, where coastal cliffs, quarries and inland exposures reveal important Jurassic strata. Fossils from this area provide evidence of the marine ecosystems that once occupied the region and help palaeontologists compare rock sequences across Europe.
About Planisphinctes
Planisphinctes is an ammonite genus associated with Bathonian marine deposits. Ammonites were extinct cephalopods related to modern squid, cuttlefish and nautiluses. Their coiled external shells were divided internally into chambers. The living animal occupied the final chamber, while the earlier chambers helped regulate buoyancy.
The spiral geometry and ribbed ornament of ammonites are both attractive and scientifically informative. Individual fossils may preserve original shell material, an internal mould, mineral replacement, surrounding matrix or natural weathering. These variations are genuine products of fossilisation and make every specimen unique. The details on this piece record its burial in an ancient marine sediment and survival through an immense span of geological time.
Scientific and Collecting Interest
Ammonites evolved rapidly and were distributed widely through Jurassic seas. Palaeontologists use characteristic ammonite assemblages as guide fossils when comparing the relative ages of sedimentary layers. A Planisphinctes specimen from the Lower Bathonian therefore provides a tangible connection with the evidence used to reconstruct geological time and marine evolution.
This carefully selected fossil is suitable for an ammonite collection, educational display, geological study cabinet or natural-history interior. Its Normandy provenance will appeal to collectors of French fossils and European Jurassic material. It can also make a thoughtful gift for anyone interested in palaeontology, evolution and ancient oceans.
Actual Specimen and Sizing
Please examine all photographs closely because they form an important part of the description. You will receive the exact fossil pictured, not a substitute. Full sizing is shown in the photograph for an accurate visual reference. Any matrix, irregularities, mineral variation or natural weathering visible in the images are authentic characteristics of the specimen.
Certificate of Authenticity
A generic Certificate of Authenticity accompanies this fossil and carries our lifetime guarantee that it is genuine. This provides lasting reassurance and provenance for the collector. Handle the specimen carefully and keep it away from excessive humidity, prolonged direct sunlight and sudden temperature changes.
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