Rare Sigaloceras enodatum Ammonite Fossil Jurassic Ashton Keynes UK Genuine Authentic COA
£ 24.00
RARE JURASSIC AMMONITE FROM ASHTON KEYNES, UKThis rare Sigaloceras enodatum ammonite fossil is a genuine specimen from the
Lower Callovian stage of the Middle Jurassic, found in Ashton Keynes, United Kingdom. A carefully chosen piece, it displays the distinctive features of its species and provides both scientific and aesthetic value. The photographs show the actual fossil you will receive, with a 1 cm scale rule included for accurate sizing. Every specimen is guaranteed authentic and supplied with a Certificate of Authenticity. GEOLOGICAL SETTING AND AGEThe fossil dates to the Lower Callovian stage, around 166–163 million years ago. During this period, the region of present-day Ashton Keynes was submerged beneath shallow epicontinental seas that stretched across much of Europe. Fine-grained sediments settled on the seabed, creating an environment that preserved marine life in exquisite detail. The Callovian strata of the Jurassic are particularly rich in ammonites, making this specimen part of an important paleontological record. SPECIES IDENTIFICATION AND CLASSIFICATIONSigaloceras enodatum belongs to the class Cephalopoda, order Ammonitida, and the superfamily Stephanoceratoidea. Ammonites of this genus are characterised by their strongly ribbed, planispiral shells with compressed whorls. The ribs extend across the flanks of the shell in a bold yet graceful pattern, distinguishing Sigaloceras from other related genera. The species epithet “enodatum” refers to subtle distinctions in its ribbing and whorl development, traits that have long been used by paleontologists to identify this ammonite in Jurassic rock sequences. MORPHOLOGY AND DISTINCTIVE TRAITSThis specimen exhibits the clear ribbing and compressed shell typical of Sigaloceras enodatum. The whorls are tightly coiled, and the ribbing is symmetrical and well-defined, producing an attractive pattern across the fossil surface. These features not only enhance its aesthetic appeal but also provide insight into how these marine cephalopods adapted to their environments. The shell’s hydrodynamic form, combined with its reinforced ribbing, may have helped the ammonite maintain buoyancy and stability in the shallow seas of the Jurassic. SCIENTIFIC AND STRATIGRAPHIC IMPORTANCESigaloceras enodatum is an important index fossil used in the subdivision of Lower Callovian biozones. Its presence in Jurassic strata allows geologists to date and correlate rock layers with accuracy. Ammonites such as this are crucial to reconstructing the ancient marine ecosystems of Europe and to understanding the evolutionary development of cephalopods. Collectors value these fossils not only for their beauty but also for their role in charting the geological timescale. CONDITION AND PREPARATIONThe fossil has been carefully prepared to ensure its features are preserved while keeping its natural integrity intact. The ribbing, shell form, and whorl structure are sharply visible, demonstrating the characteristic morphology of the species. This is not a reproduction or cast but a one-of-a-kind, genuine ammonite fossil. The images provided represent the actual specimen, offering full transparency and buyer confidence. GUARANTEE OF AUTHENTICITYAll of our fossils are 100% genuine specimens, responsibly sourced and scientifically identified. Each purchase includes a Certificate of Authenticity to verify provenance. This Sigaloceras enodatum ammonite fossil from Ashton Keynes is a rare and scientifically significant example of Jurassic marine life, making it an ideal addition for collectors, educators, and enthusiasts of natural history.
Lower Callovian stage of the Middle Jurassic, found in Ashton Keynes, United Kingdom. A carefully chosen piece, it displays the distinctive features of its species and provides both scientific and aesthetic value. The photographs show the actual fossil you will receive, with a 1 cm scale rule included for accurate sizing. Every specimen is guaranteed authentic and supplied with a Certificate of Authenticity. GEOLOGICAL SETTING AND AGEThe fossil dates to the Lower Callovian stage, around 166–163 million years ago. During this period, the region of present-day Ashton Keynes was submerged beneath shallow epicontinental seas that stretched across much of Europe. Fine-grained sediments settled on the seabed, creating an environment that preserved marine life in exquisite detail. The Callovian strata of the Jurassic are particularly rich in ammonites, making this specimen part of an important paleontological record. SPECIES IDENTIFICATION AND CLASSIFICATIONSigaloceras enodatum belongs to the class Cephalopoda, order Ammonitida, and the superfamily Stephanoceratoidea. Ammonites of this genus are characterised by their strongly ribbed, planispiral shells with compressed whorls. The ribs extend across the flanks of the shell in a bold yet graceful pattern, distinguishing Sigaloceras from other related genera. The species epithet “enodatum” refers to subtle distinctions in its ribbing and whorl development, traits that have long been used by paleontologists to identify this ammonite in Jurassic rock sequences. MORPHOLOGY AND DISTINCTIVE TRAITSThis specimen exhibits the clear ribbing and compressed shell typical of Sigaloceras enodatum. The whorls are tightly coiled, and the ribbing is symmetrical and well-defined, producing an attractive pattern across the fossil surface. These features not only enhance its aesthetic appeal but also provide insight into how these marine cephalopods adapted to their environments. The shell’s hydrodynamic form, combined with its reinforced ribbing, may have helped the ammonite maintain buoyancy and stability in the shallow seas of the Jurassic. SCIENTIFIC AND STRATIGRAPHIC IMPORTANCESigaloceras enodatum is an important index fossil used in the subdivision of Lower Callovian biozones. Its presence in Jurassic strata allows geologists to date and correlate rock layers with accuracy. Ammonites such as this are crucial to reconstructing the ancient marine ecosystems of Europe and to understanding the evolutionary development of cephalopods. Collectors value these fossils not only for their beauty but also for their role in charting the geological timescale. CONDITION AND PREPARATIONThe fossil has been carefully prepared to ensure its features are preserved while keeping its natural integrity intact. The ribbing, shell form, and whorl structure are sharply visible, demonstrating the characteristic morphology of the species. This is not a reproduction or cast but a one-of-a-kind, genuine ammonite fossil. The images provided represent the actual specimen, offering full transparency and buyer confidence. GUARANTEE OF AUTHENTICITYAll of our fossils are 100% genuine specimens, responsibly sourced and scientifically identified. Each purchase includes a Certificate of Authenticity to verify provenance. This Sigaloceras enodatum ammonite fossil from Ashton Keynes is a rare and scientifically significant example of Jurassic marine life, making it an ideal addition for collectors, educators, and enthusiasts of natural history.
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