Pseudogrammoceras Ammonite Fossil Jurassic UK Genuine COA Card - Toarcian Whitby Mudstone Cheltenham Collector Specimen
£ 36.00
Pseudogrammoceras sp. Ammonite Fossil from Cheltenham, GloucestershireThis is a genuine Pseudogrammoceras sp. ammonite fossil from the Whitby Mudstone
Formation, dating to the Lower Jurassic, Toarcian stage, collected from Cheltenham, Gloucestershire, UK. This carefully chosen fossil is a desirable British Jurassic marine cephalopod specimen, selected for its natural form, geological interest, and collectable display appeal. It is supplied with a Certificate of Authenticity lifetime guarantee generic card, making it a trusted addition to an ammonite collection, fossil cabinet, natural history display, educational geology collection, or prehistoric gift selection.The photograph shows the actual fossil specimen you will receive. Full sizing and scale can be seen in the photo.Geological Age and FormationThis ammonite dates to the Toarcian stage of the Lower Jurassic, approximately 183 to 174 million years old. The Toarcian is one of the most important intervals for British ammonite fossils, with many distinctive genera used by geologists to date and correlate marine rock layers across the UK and Europe.The specimen comes from the Whitby Mudstone Formation, a well-known Lower Jurassic marine rock unit famous for its dark mudstones, shales, fossil-bearing horizons, and rich ammonite faunas. Although the formation is strongly associated with Yorkshire, equivalent Toarcian marine deposits occur across other parts of England, including the Midlands and Gloucestershire. These rocks were laid down in ancient seas that covered much of Britain during the Early Jurassic.Location: Cheltenham, GloucestershireThis fossil was collected from Cheltenham, Gloucestershire, an area with important Lower Jurassic geology. During the Toarcian, this region formed part of a broad marine basin where fine mud and organic-rich sediment accumulated on the sea floor. These low-energy marine conditions were ideal for preserving ammonites and other ancient sea life.The rocks of this age record a vanished marine environment, long before the modern Cotswold landscape existed. Fossils from Gloucestershire are collectable not only for their age and appearance, but also for their connection to Britain’s classic Jurassic fossil record.Fossil Type and IdentificationThis specimen is identified as Pseudogrammoceras sp., an extinct ammonite from the Lower Jurassic. The “sp.” designation means the specimen has been identified to genus level, while the exact species is left open. This is commonly used for ammonites where natural preservation, wear, or visible diagnostic features do not allow a precise species-level assignment.Pseudogrammoceras is a Toarcian ammonite genus associated with the family Hildoceratidae, within the order Ammonitida. Hildoceratid ammonites are important Lower Jurassic fossils and are widely used in biostratigraphy because of their rapid evolution and distinctive shell forms.Ammonites were extinct marine molluscs related to modern squid, cuttlefish, octopus, and nautilus. They had coiled external shells divided internally into chambers. The living animal occupied the outer body chamber, while the earlier chambers helped control buoyancy, allowing the ammonite to move through the water column.Morphology and Notable FeaturesPseudogrammoceras ammonites are typically recognised by their coiled shell form, compressed profile, ribbed ornament, and ammonite structure characteristic of Toarcian hildoceratids. Depending on preservation, specimens may show visible whorls, fine to moderately strong ribbing, a defined umbilical area, natural shell texture, mineralisation, and surface detail formed during the animal’s growth.The shell grew in a spiral, with each whorl representing a later stage of development. Internal walls known as septa divided the shell into chambers, and the lines where these septa met the outer shell formed suture patterns. These features are part of what makes ammonites scientifically valuable and visually appealing to collectors.As a genuine fossil, this specimen may show natural matrix, fossil shell detail, mineral staining, colour variation, weathering, small chips, cracks, or areas of natural wear caused by fossilisation and geological history. These characteristics are normal for authentic fossils and add to the individuality of the piece. The photo shows the exact fossil being offered, allowing the buyer to view its preservation, condition, size, and display quality before purchase.Lower Jurassic Marine EnvironmentThis Pseudogrammoceras ammonite lived in a Jurassic sea that covered parts of Britain during the Toarcian. The Whitby Mudstone Formation represents marine conditions where fine sediment settled slowly on the seabed, preserving a rich fossil record that includes ammonites, belemnites, bivalves, fish remains, and other marine organisms.Ammonites were active swimming or drifting cephalopods, likely feeding on small prey in the water column using tentacles. After death, the shell could sink to the seabed and become buried in mud. Over millions of years, compaction, mineralisation, and geological change transformed the shell and surrounding sediment into fossil-bearing rock.Authenticity and CollectabilityThis Pseudogrammoceras sp. ammonite fossil is a genuine specimen from Cheltenham, Gloucestershire, UK, dating to the Toarcian of the Lower Jurassic within the Whitby Mudstone Formation. It is suitable for collectors of British fossils, Jurassic ammonites, Gloucestershire fossils, Whitby Mudstone fossils, marine cephalopods, natural history specimens, educational geology pieces, and display fossils.This carefully selected fossil includes a Certificate of Authenticity lifetime guarantee generic card, and the fossil shown in the photo is the actual specimen you will receive.
Formation, dating to the Lower Jurassic, Toarcian stage, collected from Cheltenham, Gloucestershire, UK. This carefully chosen fossil is a desirable British Jurassic marine cephalopod specimen, selected for its natural form, geological interest, and collectable display appeal. It is supplied with a Certificate of Authenticity lifetime guarantee generic card, making it a trusted addition to an ammonite collection, fossil cabinet, natural history display, educational geology collection, or prehistoric gift selection.The photograph shows the actual fossil specimen you will receive. Full sizing and scale can be seen in the photo.Geological Age and FormationThis ammonite dates to the Toarcian stage of the Lower Jurassic, approximately 183 to 174 million years old. The Toarcian is one of the most important intervals for British ammonite fossils, with many distinctive genera used by geologists to date and correlate marine rock layers across the UK and Europe.The specimen comes from the Whitby Mudstone Formation, a well-known Lower Jurassic marine rock unit famous for its dark mudstones, shales, fossil-bearing horizons, and rich ammonite faunas. Although the formation is strongly associated with Yorkshire, equivalent Toarcian marine deposits occur across other parts of England, including the Midlands and Gloucestershire. These rocks were laid down in ancient seas that covered much of Britain during the Early Jurassic.Location: Cheltenham, GloucestershireThis fossil was collected from Cheltenham, Gloucestershire, an area with important Lower Jurassic geology. During the Toarcian, this region formed part of a broad marine basin where fine mud and organic-rich sediment accumulated on the sea floor. These low-energy marine conditions were ideal for preserving ammonites and other ancient sea life.The rocks of this age record a vanished marine environment, long before the modern Cotswold landscape existed. Fossils from Gloucestershire are collectable not only for their age and appearance, but also for their connection to Britain’s classic Jurassic fossil record.Fossil Type and IdentificationThis specimen is identified as Pseudogrammoceras sp., an extinct ammonite from the Lower Jurassic. The “sp.” designation means the specimen has been identified to genus level, while the exact species is left open. This is commonly used for ammonites where natural preservation, wear, or visible diagnostic features do not allow a precise species-level assignment.Pseudogrammoceras is a Toarcian ammonite genus associated with the family Hildoceratidae, within the order Ammonitida. Hildoceratid ammonites are important Lower Jurassic fossils and are widely used in biostratigraphy because of their rapid evolution and distinctive shell forms.Ammonites were extinct marine molluscs related to modern squid, cuttlefish, octopus, and nautilus. They had coiled external shells divided internally into chambers. The living animal occupied the outer body chamber, while the earlier chambers helped control buoyancy, allowing the ammonite to move through the water column.Morphology and Notable FeaturesPseudogrammoceras ammonites are typically recognised by their coiled shell form, compressed profile, ribbed ornament, and ammonite structure characteristic of Toarcian hildoceratids. Depending on preservation, specimens may show visible whorls, fine to moderately strong ribbing, a defined umbilical area, natural shell texture, mineralisation, and surface detail formed during the animal’s growth.The shell grew in a spiral, with each whorl representing a later stage of development. Internal walls known as septa divided the shell into chambers, and the lines where these septa met the outer shell formed suture patterns. These features are part of what makes ammonites scientifically valuable and visually appealing to collectors.As a genuine fossil, this specimen may show natural matrix, fossil shell detail, mineral staining, colour variation, weathering, small chips, cracks, or areas of natural wear caused by fossilisation and geological history. These characteristics are normal for authentic fossils and add to the individuality of the piece. The photo shows the exact fossil being offered, allowing the buyer to view its preservation, condition, size, and display quality before purchase.Lower Jurassic Marine EnvironmentThis Pseudogrammoceras ammonite lived in a Jurassic sea that covered parts of Britain during the Toarcian. The Whitby Mudstone Formation represents marine conditions where fine sediment settled slowly on the seabed, preserving a rich fossil record that includes ammonites, belemnites, bivalves, fish remains, and other marine organisms.Ammonites were active swimming or drifting cephalopods, likely feeding on small prey in the water column using tentacles. After death, the shell could sink to the seabed and become buried in mud. Over millions of years, compaction, mineralisation, and geological change transformed the shell and surrounding sediment into fossil-bearing rock.Authenticity and CollectabilityThis Pseudogrammoceras sp. ammonite fossil is a genuine specimen from Cheltenham, Gloucestershire, UK, dating to the Toarcian of the Lower Jurassic within the Whitby Mudstone Formation. It is suitable for collectors of British fossils, Jurassic ammonites, Gloucestershire fossils, Whitby Mudstone fossils, marine cephalopods, natural history specimens, educational geology pieces, and display fossils.This carefully selected fossil includes a Certificate of Authenticity lifetime guarantee generic card, and the fossil shown in the photo is the actual specimen you will receive.
