Stephanoceras humphriesianum Ammonite Fossil Bajocian Dorset UK Genuine COA Oborne Wood Inferior Oolite Jurassic Specimen
£ 36.00
GENUINE STEPHANOCERAS HUMPHRIESIANUM AMMONITE FOSSILThis is a genuine Stephanoceras humphriesianum ammonite fossil from the Inferior
Oolite Formation, Middle Jurassic, Bajocian Stage, collected from Oborne Wood, Dorset, UK. This carefully chosen fossil specimen is an excellent piece for collectors of British ammonites, Dorset fossils, Jurassic marine fossils, 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, colour, surface detail, 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 humphriesianum 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, distinctive 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 humphriesianum. Stephanoceras is associated with the family Stephanoceratidae, a well-known Middle Jurassic ammonite family noted for robust shell forms, rounded whorls, strong ribbing, and a bold sculptural appearance. Stephanoceratid ammonites are especially significant in Bajocian biostratigraphy because their changing forms help geologists compare and date marine sedimentary rocks. GEOLOGICAL AGE AND INFERIOR OOLITE FORMATIONThis fossil comes from the Inferior Oolite Formation, a classic British Middle Jurassic rock unit known for fossiliferous limestones, sandy limestones, iron-rich horizons, and a rich marine fossil assemblage. The specimen dates to the Bajocian Stage of the Middle Jurassic, approximately 170 to 168 million years ago.The Bajocian was a time of diverse ammonite faunas across the shallow seas of Europe. Species such as Stephanoceras humphriesianum are closely associated with important Middle Jurassic ammonite successions and are part of the fossil record used to understand changing marine environments, ancient biodiversity, and the relative dating of Jurassic strata. OBORNE WOOD, DORSET LOCALITYThis specimen was collected from Oborne Wood, Dorset, UK, a locality associated with the fossil-bearing Inferior Oolite deposits of southern England. Dorset is one of Britain’s most important fossil-producing counties, with a long history of geological study and fossil collecting. While the Dorset coast is internationally famous, inland localities such as Oborne Wood are also valued for Middle Jurassic ammonite material and other marine fossils.During the Bajocian, this part of southern Britain lay beneath warm, shallow marine waters. These ancient seas supported ammonites, belemnites, bivalves, brachiopods, gastropods, echinoids, corals, and other marine organisms. Ammonites such as Stephanoceras humphriesianum lived as active swimming cephalopods before their shells eventually settled onto the sea floor after death.Burial in carbonate-rich sediment helped preserve some shells over millions of years. Mineralisation, compaction, and natural geological alteration gradually transformed the remains into fossils within the Inferior Oolite Formation. AMMONITE MORPHOLOGY AND NATURAL FEATURESStephanoceras humphriesianum displays the classic planispiral ammonite shell form, with the shell coiled in a flat spiral. Stephanoceratid ammonites are often admired for their rounded whorls, compact coiling, and strong ribbing, which can give the fossil a bold three-dimensional appearance. Depending on preservation, the specimen may show rib detail, whorl shape, shell ornamentation, mineral staining, matrix attachment, natural 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, and whorl proportions are key features used in ammonite identification. Natural details such as small fractures, weathered areas, sedimentary contact marks, colour variation, matrix, and mineral deposits are part of the fossil’s geological history and add individuality to the specimen. COLLECTING, DISPLAY AND EDUCATIONAL INTERESTThis Stephanoceras humphriesianum ammonite fossil is ideal for display in a fossil cabinet, study, classroom, office, collection drawer, natural history arrangement, or British Jurassic fossil collection. Its named species identification, Inferior Oolite Formation origin, Bajocian age, and Oborne Wood locality give it strong collecting value.It is suitable for collectors interested in Dorset fossils, British ammonites, Jurassic marine life, extinct cephalopods, palaeontology, geology, and educational fossil specimens. The natural coiled form gives the fossil classic visual appeal, while the detailed geological information adds scientific interest and makes it a meaningful specimen from the ancient seas of Jurassic Britain. AUTHENTICITY AND SPECIMEN DETAILSThis is a genuine Stephanoceras humphriesianum ammonite fossil from the Inferior Oolite Formation, Middle Jurassic, Bajocian Stage, Oborne Wood, 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.
Oolite Formation, Middle Jurassic, Bajocian Stage, collected from Oborne Wood, Dorset, UK. This carefully chosen fossil specimen is an excellent piece for collectors of British ammonites, Dorset fossils, Jurassic marine fossils, 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, colour, surface detail, 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 humphriesianum 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, distinctive 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 humphriesianum. Stephanoceras is associated with the family Stephanoceratidae, a well-known Middle Jurassic ammonite family noted for robust shell forms, rounded whorls, strong ribbing, and a bold sculptural appearance. Stephanoceratid ammonites are especially significant in Bajocian biostratigraphy because their changing forms help geologists compare and date marine sedimentary rocks. GEOLOGICAL AGE AND INFERIOR OOLITE FORMATIONThis fossil comes from the Inferior Oolite Formation, a classic British Middle Jurassic rock unit known for fossiliferous limestones, sandy limestones, iron-rich horizons, and a rich marine fossil assemblage. The specimen dates to the Bajocian Stage of the Middle Jurassic, approximately 170 to 168 million years ago.The Bajocian was a time of diverse ammonite faunas across the shallow seas of Europe. Species such as Stephanoceras humphriesianum are closely associated with important Middle Jurassic ammonite successions and are part of the fossil record used to understand changing marine environments, ancient biodiversity, and the relative dating of Jurassic strata. OBORNE WOOD, DORSET LOCALITYThis specimen was collected from Oborne Wood, Dorset, UK, a locality associated with the fossil-bearing Inferior Oolite deposits of southern England. Dorset is one of Britain’s most important fossil-producing counties, with a long history of geological study and fossil collecting. While the Dorset coast is internationally famous, inland localities such as Oborne Wood are also valued for Middle Jurassic ammonite material and other marine fossils.During the Bajocian, this part of southern Britain lay beneath warm, shallow marine waters. These ancient seas supported ammonites, belemnites, bivalves, brachiopods, gastropods, echinoids, corals, and other marine organisms. Ammonites such as Stephanoceras humphriesianum lived as active swimming cephalopods before their shells eventually settled onto the sea floor after death.Burial in carbonate-rich sediment helped preserve some shells over millions of years. Mineralisation, compaction, and natural geological alteration gradually transformed the remains into fossils within the Inferior Oolite Formation. AMMONITE MORPHOLOGY AND NATURAL FEATURESStephanoceras humphriesianum displays the classic planispiral ammonite shell form, with the shell coiled in a flat spiral. Stephanoceratid ammonites are often admired for their rounded whorls, compact coiling, and strong ribbing, which can give the fossil a bold three-dimensional appearance. Depending on preservation, the specimen may show rib detail, whorl shape, shell ornamentation, mineral staining, matrix attachment, natural 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, and whorl proportions are key features used in ammonite identification. Natural details such as small fractures, weathered areas, sedimentary contact marks, colour variation, matrix, and mineral deposits are part of the fossil’s geological history and add individuality to the specimen. COLLECTING, DISPLAY AND EDUCATIONAL INTERESTThis Stephanoceras humphriesianum ammonite fossil is ideal for display in a fossil cabinet, study, classroom, office, collection drawer, natural history arrangement, or British Jurassic fossil collection. Its named species identification, Inferior Oolite Formation origin, Bajocian age, and Oborne Wood locality give it strong collecting value.It is suitable for collectors interested in Dorset fossils, British ammonites, Jurassic marine life, extinct cephalopods, palaeontology, geology, and educational fossil specimens. The natural coiled form gives the fossil classic visual appeal, while the detailed geological information adds scientific interest and makes it a meaningful specimen from the ancient seas of Jurassic Britain. AUTHENTICITY AND SPECIMEN DETAILSThis is a genuine Stephanoceras humphriesianum ammonite fossil from the Inferior Oolite Formation, Middle Jurassic, Bajocian Stage, Oborne Wood, 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.
Other Products
