Sigaloceras anterior Ammonite Fossil Jurassic Gloucestershire UK Rare Genuine Authentic COA
£ 14.40
AUTHENTIC JURASSIC FOSSIL FROM GLOUCESTERSHIRE, UKThis rare Sigaloceras anterior ammonite fossil is a genuine specimen from the
Lower Callovian stage of the Middle Jurassic, discovered in Gloucestershire, United Kingdom. A carefully chosen piece, it highlights the distinctive features of its species and carries both scientific and collector value. The photographs show the exact specimen you will receive, with a 1 cm scale rule cube for accurate sizing. Every fossil is 100% genuine and comes with a Certificate of Authenticity for peace of mind. GEOLOGICAL SETTING AND AGEThe fossil originates from the Lower Callovian stage of the Middle Jurassic, dating back around 166–163 million years. At this time, Gloucestershire and much of southern England were submerged beneath shallow epicontinental seas. Fine muds and silts deposited on the sea floor provided the perfect conditions for preserving marine organisms, particularly ammonites. These sedimentary deposits, often part of the well-known Oxford Clay Formation, represent one of the richest fossil-bearing sequences in Europe, with Sigaloceras anterior forming an important part of its paleontological record. SPECIES IDENTIFICATION AND CLASSIFICATIONSigaloceras anterior belongs to the class Cephalopoda, order Ammonitida, and the superfamily Stephanoceratoidea. Within this group, the genus Sigaloceras is known for its strongly ribbed, planispiral shells, with compressed whorls and distinctive rib patterns. The specific epithet “anterior” denotes particular morphological traits within the genus that help paleontologists distinguish it from related species. Such ammonites are not only striking to look at but also vital in understanding evolutionary patterns of cephalopods during the Jurassic. MORPHOLOGICAL FEATURES AND NOTABLE TRAITSThe specimen displays the compressed whorls and pronounced ribbing typical of Sigaloceras anterior. Ribs run symmetrically across the shell, creating a bold ornamentation that makes this ammonite highly recognisable. These features would have strengthened the shell against water pressure and predators while also influencing the ammonite’s movement in the water. The whorl expansion is regular, and the symmetry of the ribbing enhances the fossil’s aesthetic appeal, making it a highly collectable piece for enthusiasts of Jurassic ammonites. SCIENTIFIC AND STRATIGRAPHIC IMPORTANCEAmmonites such as Sigaloceras anterior are regarded as excellent index fossils. They allow geologists to precisely identify and correlate Lower Callovian strata across different geographic regions. Their presence provides essential information about Jurassic biozones and depositional environments, making them invaluable to paleontological and geological studies. For collectors, this means that owning a specimen is not just about display value—it is also about holding a scientifically significant piece of Earth’s history. CONDITION AND PRESENTATIONThis fossil has been professionally prepared to reveal its natural details while maintaining its structural integrity. The ribbing, whorl curvature, and shell surface are clearly visible, showcasing the key traits of the species. It is a one-of-a-kind specimen—not a replica or cast. The photos provided represent the exact ammonite you will receive, ensuring full transparency and authenticity. GUARANTEE OF AUTHENTICITYAll of our fossils are guaranteed to be 100% genuine and responsibly sourced. Each specimen is scientifically identified and supplied with a Certificate of Authenticity. This Sigaloceras anterior ammonite fossil from Gloucestershire is an outstanding example of Lower Callovian marine life, making it a superb addition for fossil collectors, educators, and anyone with an appreciation for natural history.
Lower Callovian stage of the Middle Jurassic, discovered in Gloucestershire, United Kingdom. A carefully chosen piece, it highlights the distinctive features of its species and carries both scientific and collector value. The photographs show the exact specimen you will receive, with a 1 cm scale rule cube for accurate sizing. Every fossil is 100% genuine and comes with a Certificate of Authenticity for peace of mind. GEOLOGICAL SETTING AND AGEThe fossil originates from the Lower Callovian stage of the Middle Jurassic, dating back around 166–163 million years. At this time, Gloucestershire and much of southern England were submerged beneath shallow epicontinental seas. Fine muds and silts deposited on the sea floor provided the perfect conditions for preserving marine organisms, particularly ammonites. These sedimentary deposits, often part of the well-known Oxford Clay Formation, represent one of the richest fossil-bearing sequences in Europe, with Sigaloceras anterior forming an important part of its paleontological record. SPECIES IDENTIFICATION AND CLASSIFICATIONSigaloceras anterior belongs to the class Cephalopoda, order Ammonitida, and the superfamily Stephanoceratoidea. Within this group, the genus Sigaloceras is known for its strongly ribbed, planispiral shells, with compressed whorls and distinctive rib patterns. The specific epithet “anterior” denotes particular morphological traits within the genus that help paleontologists distinguish it from related species. Such ammonites are not only striking to look at but also vital in understanding evolutionary patterns of cephalopods during the Jurassic. MORPHOLOGICAL FEATURES AND NOTABLE TRAITSThe specimen displays the compressed whorls and pronounced ribbing typical of Sigaloceras anterior. Ribs run symmetrically across the shell, creating a bold ornamentation that makes this ammonite highly recognisable. These features would have strengthened the shell against water pressure and predators while also influencing the ammonite’s movement in the water. The whorl expansion is regular, and the symmetry of the ribbing enhances the fossil’s aesthetic appeal, making it a highly collectable piece for enthusiasts of Jurassic ammonites. SCIENTIFIC AND STRATIGRAPHIC IMPORTANCEAmmonites such as Sigaloceras anterior are regarded as excellent index fossils. They allow geologists to precisely identify and correlate Lower Callovian strata across different geographic regions. Their presence provides essential information about Jurassic biozones and depositional environments, making them invaluable to paleontological and geological studies. For collectors, this means that owning a specimen is not just about display value—it is also about holding a scientifically significant piece of Earth’s history. CONDITION AND PRESENTATIONThis fossil has been professionally prepared to reveal its natural details while maintaining its structural integrity. The ribbing, whorl curvature, and shell surface are clearly visible, showcasing the key traits of the species. It is a one-of-a-kind specimen—not a replica or cast. The photos provided represent the exact ammonite you will receive, ensuring full transparency and authenticity. GUARANTEE OF AUTHENTICITYAll of our fossils are guaranteed to be 100% genuine and responsibly sourced. Each specimen is scientifically identified and supplied with a Certificate of Authenticity. This Sigaloceras anterior ammonite fossil from Gloucestershire is an outstanding example of Lower Callovian marine life, making it a superb addition for fossil collectors, educators, and anyone with an appreciation for natural history.
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