Description
Genuine Poculomorphus cycloides Ammonite Fossil
This listing is for the genuine ammonite fossil shown in the photographs, identified as Poculomorphus cycloides. It comes from Caen in Normandy, France, and dates to the Middle Bajocian Stage of the Middle Jurassic. The Bajocian spans approximately 170.3 to 168.3 million years ago, when marine environments covered extensive areas of western Europe. This is an authentic fossil specimen, not a cast, replica, or modern reproduction, and the photographs show the exact piece that will be supplied.
Middle Jurassic Marine Geology
Ammonites were extinct marine cephalopods related to living squid, cuttlefish, octopus, and nautilus. Their coiled shells were divided internally by septa into a succession of chambers. The living animal occupied the final body chamber, while earlier chambers formed part of a buoyancy system. Suture lines developed where the septa met the shell wall and can help palaeontologists identify ammonite groups. Because ammonites evolved rapidly and were distributed widely, their fossils are important index fossils used to correlate and date Jurassic marine sedimentary rocks.
Poculomorphus cycloides Identification
The supplied identification for this specimen is Poculomorphus cycloides. This Bajocian ammonite preserves evidence of the diverse cephalopod communities that inhabited Jurassic seas. Depending on preservation and growth stage, the fossil may show coiled whorls, ribbing, tubercles, shell profile, body chamber, sutural detail, internal mould, or mineral replacement. Please inspect every photograph carefully because they show the exact morphology, condition, and natural surfaces of this individual specimen. Matrix, colour variation, weathering, incomplete areas, mineral veining, exposed internal material, and small chips are natural parts of its geological history rather than manufacturing defects.
Caen Normandy Provenance
The Caen area of Normandy is well known for fossil-bearing Jurassic sedimentary rocks. These strata record ancient marine environments in which ammonite shells and other remains accumulated on or within seabed sediment. Over millions of years the sediment compacted into rock, while mineral-rich water preserved or replaced original shell material. Later uplift and erosion exposed fossil-bearing layers again. The matrix and mineral textures visible on this specimen are therefore meaningful elements of its provenance and represent a geological journey lasting more than 168 million years.
Exact Fossil for Collection or Study
You will receive the exact Poculomorphus cycloides ammonite shown in the photographs, with no substitution. The first image is the main display view and the second provides another angle for assessing shell form, ornament, matrix, and preservation. Please refer to the photographs for full sizing and scale. This carefully chosen specimen is suitable for a Middle Jurassic ammonite collection, French fossil display, natural history cabinet, geology teaching set, scientific study resource, or distinctive gift for a collector, student, or fossil enthusiast. Its documented Middle Bajocian age and Caen provenance add valuable scientific and historical context.
Certificate of Authenticity
A generic Certificate of Authenticity is included with the fossil. It records the supplied identification, geological age, and locality information and carries our lifetime guarantee of authenticity. The specimen will be packed carefully and securely for dispatch. Every natural feature visible in the photographs belongs to the actual fossil you will receive. This genuine Poculomorphus cycloides ammonite offers an attractive and scientifically informative connection to the Middle Jurassic seas of Normandy and the remarkable ammonite diversity preserved in the rocks around Caen.






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