Stephanoceras umbilicum Ammonite Fossil Bajocian France Genuine Jurassic COA Calvados Normandy Cephalopod Specimen
£ 36.00
GENUINE STEPHANOCERAS UMBILICUM AMMONITE FOSSILThis is a genuine Stephanoceras umbilicum ammonite fossil from the Middle
Jurassic, Bajocian Stage, collected from Calvados, Normandy, France. This carefully chosen fossil specimen is an excellent piece for collectors of French ammonites, Jurassic fossils, extinct marine cephalopods, natural history specimens, and scientifically labelled 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 CLASSIFICATIONStephanoceras umbilicum 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 structure, varied ornamentation, and rapid evolutionary changes make them highly valued by fossil collectors and important in palaeontology.This specimen belongs to the genus Stephanoceras and the species Stephanoceras umbilicum. Stephanoceras is associated with the family Stephanoceratidae, a well-known group of Middle Jurassic ammonites often recognised for robust shell forms, rounded whorls, strong ribbing, and a bold three-dimensional appearance. Stephanoceratid ammonites are especially important in Bajocian biostratigraphy, where their changing shell features help geologists compare and date marine sedimentary rock layers. GEOLOGICAL AGE AND BAJOCIAN CONTEXTThis fossil dates from the Bajocian Stage of the Middle Jurassic, approximately 170 to 168 million years ago. The Bajocian was a period of widespread shallow marine environments across much of western Europe, with ammonites forming an abundant and diverse part of the ancient sea fauna.During this time, ammonites such as Stephanoceras umbilicum lived as active swimming marine animals. Their chambered shells helped regulate buoyancy in the water column, while the living animal occupied the outer body chamber. After death, the shell could settle onto the sea floor, become buried by sediment, and eventually fossilise through mineralisation, compaction, and long-term geological alteration. CALVADOS, NORMANDY, FRANCE LOCALITYThis specimen comes from Calvados in Normandy, France, a region known for important Jurassic sedimentary rocks and fossil-bearing marine deposits. Normandy has long been valued by fossil collectors for its classic European Jurassic ammonites, belemnites, bivalves, brachiopods, echinoids, gastropods, and other marine fossils.During the Middle Jurassic, the Normandy region was part of a shallow marine setting connected to wider European seas. Warm, carbonate-rich waters and sea-floor sediments helped create the conditions in which ammonite shells could be buried and preserved. Over millions of years, these deposits became fossiliferous rock layers, recording the marine life that once lived in the area. AMMONITE MORPHOLOGY AND NATURAL FEATURESStephanoceras umbilicum displays the classic planispiral ammonite form, with the shell coiled in a flat spiral. The whorls represent successive growth stages of the animal as the shell expanded during life. Stephanoceratid ammonites are often admired for their rounded whorls, pronounced ribbing, compact coiling, and sculptural fossil appearance.The species name umbilicum reflects the importance of the umbilical area in the shell form, the central region around which the whorls coil. Depending on preservation, this fossil may show a visible umbilicus, rib detail, whorl shape, shell ornamentation, natural mineral staining, matrix attachment, surface wear, or fossilisation texture.Natural details such as small fractures, weathered surfaces, sedimentary contact marks, colour variation, mineral deposits, and matrix are part of the fossil’s geological history. These features give the specimen individuality and help distinguish a genuine natural fossil from a modern cast or replica. COLLECTING, DISPLAY AND EDUCATIONAL INTERESTThis Stephanoceras umbilicum ammonite fossil is well suited for display in a fossil cabinet, study, classroom, office, collection drawer, natural history arrangement, or Jurassic fossil collection. Its named species identification, Middle Jurassic Bajocian age, French origin, and classic ammonite shape give it strong collecting appeal.It is suitable for collectors interested in French fossils, Jurassic ammonites, extinct cephalopods, marine invertebrates, palaeontology, geology, and educational fossil specimens. The natural coiled form gives the fossil immediate visual impact, while the geological age and locality information add scientific interest for anyone who appreciates well-contextualised fossils from prehistoric marine environments. AUTHENTICITY AND SPECIMEN DETAILSThis is a genuine Stephanoceras umbilicum ammonite fossil from the Middle Jurassic, Bajocian Stage, Calvados, Normandy, France. 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.
Jurassic, Bajocian Stage, collected from Calvados, Normandy, France. This carefully chosen fossil specimen is an excellent piece for collectors of French ammonites, Jurassic fossils, extinct marine cephalopods, natural history specimens, and scientifically labelled 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 CLASSIFICATIONStephanoceras umbilicum 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 structure, varied ornamentation, and rapid evolutionary changes make them highly valued by fossil collectors and important in palaeontology.This specimen belongs to the genus Stephanoceras and the species Stephanoceras umbilicum. Stephanoceras is associated with the family Stephanoceratidae, a well-known group of Middle Jurassic ammonites often recognised for robust shell forms, rounded whorls, strong ribbing, and a bold three-dimensional appearance. Stephanoceratid ammonites are especially important in Bajocian biostratigraphy, where their changing shell features help geologists compare and date marine sedimentary rock layers. GEOLOGICAL AGE AND BAJOCIAN CONTEXTThis fossil dates from the Bajocian Stage of the Middle Jurassic, approximately 170 to 168 million years ago. The Bajocian was a period of widespread shallow marine environments across much of western Europe, with ammonites forming an abundant and diverse part of the ancient sea fauna.During this time, ammonites such as Stephanoceras umbilicum lived as active swimming marine animals. Their chambered shells helped regulate buoyancy in the water column, while the living animal occupied the outer body chamber. After death, the shell could settle onto the sea floor, become buried by sediment, and eventually fossilise through mineralisation, compaction, and long-term geological alteration. CALVADOS, NORMANDY, FRANCE LOCALITYThis specimen comes from Calvados in Normandy, France, a region known for important Jurassic sedimentary rocks and fossil-bearing marine deposits. Normandy has long been valued by fossil collectors for its classic European Jurassic ammonites, belemnites, bivalves, brachiopods, echinoids, gastropods, and other marine fossils.During the Middle Jurassic, the Normandy region was part of a shallow marine setting connected to wider European seas. Warm, carbonate-rich waters and sea-floor sediments helped create the conditions in which ammonite shells could be buried and preserved. Over millions of years, these deposits became fossiliferous rock layers, recording the marine life that once lived in the area. AMMONITE MORPHOLOGY AND NATURAL FEATURESStephanoceras umbilicum displays the classic planispiral ammonite form, with the shell coiled in a flat spiral. The whorls represent successive growth stages of the animal as the shell expanded during life. Stephanoceratid ammonites are often admired for their rounded whorls, pronounced ribbing, compact coiling, and sculptural fossil appearance.The species name umbilicum reflects the importance of the umbilical area in the shell form, the central region around which the whorls coil. Depending on preservation, this fossil may show a visible umbilicus, rib detail, whorl shape, shell ornamentation, natural mineral staining, matrix attachment, surface wear, or fossilisation texture.Natural details such as small fractures, weathered surfaces, sedimentary contact marks, colour variation, mineral deposits, and matrix are part of the fossil’s geological history. These features give the specimen individuality and help distinguish a genuine natural fossil from a modern cast or replica. COLLECTING, DISPLAY AND EDUCATIONAL INTERESTThis Stephanoceras umbilicum ammonite fossil is well suited for display in a fossil cabinet, study, classroom, office, collection drawer, natural history arrangement, or Jurassic fossil collection. Its named species identification, Middle Jurassic Bajocian age, French origin, and classic ammonite shape give it strong collecting appeal.It is suitable for collectors interested in French fossils, Jurassic ammonites, extinct cephalopods, marine invertebrates, palaeontology, geology, and educational fossil specimens. The natural coiled form gives the fossil immediate visual impact, while the geological age and locality information add scientific interest for anyone who appreciates well-contextualised fossils from prehistoric marine environments. AUTHENTICITY AND SPECIMEN DETAILSThis is a genuine Stephanoceras umbilicum ammonite fossil from the Middle Jurassic, Bajocian Stage, Calvados, Normandy, France. 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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