Stephanoceras sp Ammonite Fossil Bajocian Dorset UK Genuine Jurassic Specimen COA Bridport Inferior Oolite Collectable
£ 18.00
GENUINE STEPHANOCERAS SP. AMMONITE FOSSILThis is a genuine Stephanoceras sp. ammonite fossil from the Inferior Oolite
Formation, Middle Jurassic, Bajocian Stage, collected from Bridport, Dorset, UK. This carefully chosen specimen is an attractive and scientifically interesting fossil for collectors of British ammonites, Dorset fossils, Jurassic marine life, extinct cephalopods, natural history specimens, and well-labelled geological display pieces.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, GENUS AND SCIENTIFIC CLASSIFICATIONStephanoceras sp. 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 internal structure, varied ornamentation, and rapid evolutionary changes make them highly valued by fossil collectors and important in palaeontology.This specimen is identified to genus level as Stephanoceras sp., meaning it belongs to the genus Stephanoceras while the exact species is not specified. Genus-level identification is still highly useful for collectors, especially when combined with clear locality, formation, and geological age information. Stephanoceras is associated with the family Stephanoceratidae, a prominent Middle Jurassic ammonite family often recognised for compact coiling, rounded whorls, strong ribbing, and a bold three-dimensional fossil form. GEOLOGICAL AGE AND INFERIOR OOLITE FORMATIONThis ammonite comes from the Inferior Oolite Formation, a classic British Middle Jurassic rock unit known for fossiliferous limestones, sandy limestones, iron-rich horizons, and diverse marine fossil assemblages. The specimen dates to the Bajocian Stage of the Middle Jurassic, approximately 170 to 168 million years ago.During the Bajocian, southern Britain was covered by warm, shallow marine waters. These ancient seas supported ammonites, belemnites, bivalves, brachiopods, gastropods, echinoids, corals, crinoids, and other marine organisms. Ammonites such as Stephanoceras lived as active swimming marine animals, moving through the water column before their shells eventually settled onto the sea floor after death.Burial within carbonate-rich sediment helped preserve some ammonite shells over millions of years. Mineralisation, compaction, and natural geological alteration gradually transformed the remains into fossils within the Inferior Oolite Formation. BRIDPORT, DORSET LOCALITYThis fossil was collected from Bridport, Dorset, UK, an area associated with the rich Jurassic geology of southern England. Dorset is one of Britain’s most famous fossil-producing regions, valued for its long record of marine life preserved in sedimentary rocks. While the Jurassic Coast is especially well known, Dorset’s Middle Jurassic deposits also provide important ammonites and other marine fossils.Fossils from the Bridport area are desirable because they combine classic British provenance with strong geological context. The Inferior Oolite Formation records ancient sea-floor environments, shifting marine conditions, and the fossilised remains of organisms that lived in the shallow Jurassic seas of Britain. AMMONITE MORPHOLOGY AND NATURAL FEATURESStephanoceras ammonites display the classic planispiral shell form, with the shell coiled in a flat spiral. Stephanoceratid ammonites are often admired for their rounded whorls, visible umbilicus, compact shape, and pronounced ribbing. Depending on preservation, this fossil may show rib detail, whorl shape, coiling pattern, shell ornamentation, natural mineral staining, matrix attachment, surface wear, or fossilisation texture.The shell of an ammonite was divided internally into chambers, with the living animal occupying the outer body chamber. These chambers helped regulate buoyancy in the water column, while the outer shell shape, ribbing, whorl proportions, and umbilical structure are important features used in ammonite comparison and identification.Natural details such as small fractures, weathered surfaces, sedimentary contact marks, worn areas, colour variation, mineral deposits, and matrix are part of the fossil’s geological history. These characteristics add individuality to the specimen and help distinguish a genuine natural fossil from a modern cast or replica. COLLECTING, DISPLAY AND EDUCATIONAL INTERESTThis Stephanoceras sp. ammonite fossil is well suited for display in a fossil cabinet, study, classroom, office, collection drawer, natural history arrangement, or British Jurassic fossil collection. Its genus-level identification, Inferior Oolite Formation origin, Middle Jurassic Bajocian age, and Bridport locality give it strong collecting appeal.It is suitable for collectors interested in Dorset fossils, British ammonites, Jurassic marine life, extinct cephalopods, palaeontology, geology, educational fossil specimens, and natural history display pieces. The natural coiled shell form gives the fossil immediate visual impact, while the geological formation and locality information provide valuable scientific context for anyone interested in prehistoric marine environments. AUTHENTICITY AND SPECIMEN DETAILSThis is a genuine Stephanoceras sp. ammonite fossil from the Inferior Oolite Formation, Middle Jurassic, Bajocian Stage, Bridport, Dorset, UK. 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.
Formation, Middle Jurassic, Bajocian Stage, collected from Bridport, Dorset, UK. This carefully chosen specimen is an attractive and scientifically interesting fossil for collectors of British ammonites, Dorset fossils, Jurassic marine life, extinct cephalopods, natural history specimens, and well-labelled geological display pieces.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, GENUS AND SCIENTIFIC CLASSIFICATIONStephanoceras sp. 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 internal structure, varied ornamentation, and rapid evolutionary changes make them highly valued by fossil collectors and important in palaeontology.This specimen is identified to genus level as Stephanoceras sp., meaning it belongs to the genus Stephanoceras while the exact species is not specified. Genus-level identification is still highly useful for collectors, especially when combined with clear locality, formation, and geological age information. Stephanoceras is associated with the family Stephanoceratidae, a prominent Middle Jurassic ammonite family often recognised for compact coiling, rounded whorls, strong ribbing, and a bold three-dimensional fossil form. GEOLOGICAL AGE AND INFERIOR OOLITE FORMATIONThis ammonite comes from the Inferior Oolite Formation, a classic British Middle Jurassic rock unit known for fossiliferous limestones, sandy limestones, iron-rich horizons, and diverse marine fossil assemblages. The specimen dates to the Bajocian Stage of the Middle Jurassic, approximately 170 to 168 million years ago.During the Bajocian, southern Britain was covered by warm, shallow marine waters. These ancient seas supported ammonites, belemnites, bivalves, brachiopods, gastropods, echinoids, corals, crinoids, and other marine organisms. Ammonites such as Stephanoceras lived as active swimming marine animals, moving through the water column before their shells eventually settled onto the sea floor after death.Burial within carbonate-rich sediment helped preserve some ammonite shells over millions of years. Mineralisation, compaction, and natural geological alteration gradually transformed the remains into fossils within the Inferior Oolite Formation. BRIDPORT, DORSET LOCALITYThis fossil was collected from Bridport, Dorset, UK, an area associated with the rich Jurassic geology of southern England. Dorset is one of Britain’s most famous fossil-producing regions, valued for its long record of marine life preserved in sedimentary rocks. While the Jurassic Coast is especially well known, Dorset’s Middle Jurassic deposits also provide important ammonites and other marine fossils.Fossils from the Bridport area are desirable because they combine classic British provenance with strong geological context. The Inferior Oolite Formation records ancient sea-floor environments, shifting marine conditions, and the fossilised remains of organisms that lived in the shallow Jurassic seas of Britain. AMMONITE MORPHOLOGY AND NATURAL FEATURESStephanoceras ammonites display the classic planispiral shell form, with the shell coiled in a flat spiral. Stephanoceratid ammonites are often admired for their rounded whorls, visible umbilicus, compact shape, and pronounced ribbing. Depending on preservation, this fossil may show rib detail, whorl shape, coiling pattern, shell ornamentation, natural mineral staining, matrix attachment, surface wear, or fossilisation texture.The shell of an ammonite was divided internally into chambers, with the living animal occupying the outer body chamber. These chambers helped regulate buoyancy in the water column, while the outer shell shape, ribbing, whorl proportions, and umbilical structure are important features used in ammonite comparison and identification.Natural details such as small fractures, weathered surfaces, sedimentary contact marks, worn areas, colour variation, mineral deposits, and matrix are part of the fossil’s geological history. These characteristics add individuality to the specimen and help distinguish a genuine natural fossil from a modern cast or replica. COLLECTING, DISPLAY AND EDUCATIONAL INTERESTThis Stephanoceras sp. ammonite fossil is well suited for display in a fossil cabinet, study, classroom, office, collection drawer, natural history arrangement, or British Jurassic fossil collection. Its genus-level identification, Inferior Oolite Formation origin, Middle Jurassic Bajocian age, and Bridport locality give it strong collecting appeal.It is suitable for collectors interested in Dorset fossils, British ammonites, Jurassic marine life, extinct cephalopods, palaeontology, geology, educational fossil specimens, and natural history display pieces. The natural coiled shell form gives the fossil immediate visual impact, while the geological formation and locality information provide valuable scientific context for anyone interested in prehistoric marine environments. AUTHENTICITY AND SPECIMEN DETAILSThis is a genuine Stephanoceras sp. ammonite fossil from the Inferior Oolite Formation, Middle Jurassic, Bajocian Stage, Bridport, Dorset, UK. 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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