Leptosphinctes davidsoni Ammonite Fossil Bajocian Jurassic Dorset UK Authentic Specimen COA
£ 42.00
LEPTOSPHINCTES DAVIDSONI AMMONITE FOSSILThis listing features a Leptosphinctes davidsoni Ammonite Fossil from the
Bajocian stage of the Middle Jurassic, collected at the historic Frogden Quarry, Sherborne, Dorset, United Kingdom. Dating back around 170 million years, this ammonite is an exceptional specimen from one of Dorset’s most important Jurassic fossil localities. Every piece we offer is 100% genuine and comes with a Certificate of Authenticity. The ammonite shown in the photographs is the exact specimen you will receive, with a 1 cm scale cube for size reference. GEOLOGICAL CONTEXT – FROGDEN QUARRY, DORSETThe fossil originates from the Inferior Oolite strata of Frogden Quarry, a site renowned for its superb ammonite faunas. The Bajocian stage, part of the Middle Jurassic, represents a time of widespread marine transgressions and flourishing biodiversity in shallow seas along the margins of the Tethys Ocean. At Frogden, sediments of limestone and calcareous mudstone accumulated in a warm, shallow marine environment, producing highly fossiliferous beds.Fossils from Frogden Quarry are internationally important because they preserve ammonites in excellent condition, making them essential for biostratigraphy. The ammonites of this locality are used by paleontologists to define and refine the ammonite biozones of the Bajocian stage, allowing accurate dating and correlation of Jurassic rock layers across Europe. SPECIES OVERVIEW – LEPTOSPHINCTES DAVIDSONIThis specimen belongs to Leptosphinctes davidsoni, a member of the order Ammonitida, superfamily Perisphinctoidea, and family Perisphinctidae. Ammonites of the genus Leptosphinctes are characterised by their relatively compressed, evolute shells with fine, regular ribbing that radiates elegantly across the whorls. The species davidsoni is particularly significant, with features that make it easily recognisable to specialists and highly desirable to collectors.The ribbing and coiling of Leptosphinctes davidsoni reveal adaptations for hydrodynamic efficiency, suggesting that it was an active, nektonic swimmer in Jurassic seas. Its streamlined shell structure allowed it to move easily through the water column while maintaining buoyancy. PALEONTOLOGICAL IMPORTANCELeptosphinctes davidsoni is an important index fossil for the Bajocian stage. Its restricted stratigraphic range, combined with its distinct morphology, allows geologists to define ammonite biozones that are critical for Middle Jurassic stratigraphy. Ammonites like Leptosphinctes are key tools in establishing detailed geological timescales and in correlating marine deposits across wide geographic areas.The fossil also represents the evolutionary diversification of the Perisphinctidae family during the Middle Jurassic. Its delicate ribbing and elegant coiling highlight the evolutionary experiments in shell design that characterised ammonites, making them one of the most successful marine organisms of their era. COLLECTOR’S AND EDUCATIONAL VALUEThis Leptosphinctes davidsoni ammonite fossil is a rare and valuable specimen from Frogden Quarry, a classic Dorset locality. With its fine preservation and elegant ribbing, it is both scientifically important and aesthetically appealing. Collectors of Jurassic ammonites will appreciate its rarity and provenance, while educators and students can use it as a tangible example of ammonite evolution and stratigraphic utility in the Bajocian stage. GUARANTEE OF AUTHENTICITY
• 100% genuine Leptosphinctes davidsoni ammonite fossil
• Supplied with a Certificate of Authenticity
• The exact specimen shown in the photographs is the one you will receiveThis is a rare opportunity to acquire a scientifically significant and beautifully preserved Leptosphinctes davidsoni Ammonite Fossil from the Bajocian of Frogden Quarry, Sherborne, Dorset, UK, a classic specimen from Britain’s Jurassic heritage.
Bajocian stage of the Middle Jurassic, collected at the historic Frogden Quarry, Sherborne, Dorset, United Kingdom. Dating back around 170 million years, this ammonite is an exceptional specimen from one of Dorset’s most important Jurassic fossil localities. Every piece we offer is 100% genuine and comes with a Certificate of Authenticity. The ammonite shown in the photographs is the exact specimen you will receive, with a 1 cm scale cube for size reference. GEOLOGICAL CONTEXT – FROGDEN QUARRY, DORSETThe fossil originates from the Inferior Oolite strata of Frogden Quarry, a site renowned for its superb ammonite faunas. The Bajocian stage, part of the Middle Jurassic, represents a time of widespread marine transgressions and flourishing biodiversity in shallow seas along the margins of the Tethys Ocean. At Frogden, sediments of limestone and calcareous mudstone accumulated in a warm, shallow marine environment, producing highly fossiliferous beds.Fossils from Frogden Quarry are internationally important because they preserve ammonites in excellent condition, making them essential for biostratigraphy. The ammonites of this locality are used by paleontologists to define and refine the ammonite biozones of the Bajocian stage, allowing accurate dating and correlation of Jurassic rock layers across Europe. SPECIES OVERVIEW – LEPTOSPHINCTES DAVIDSONIThis specimen belongs to Leptosphinctes davidsoni, a member of the order Ammonitida, superfamily Perisphinctoidea, and family Perisphinctidae. Ammonites of the genus Leptosphinctes are characterised by their relatively compressed, evolute shells with fine, regular ribbing that radiates elegantly across the whorls. The species davidsoni is particularly significant, with features that make it easily recognisable to specialists and highly desirable to collectors.The ribbing and coiling of Leptosphinctes davidsoni reveal adaptations for hydrodynamic efficiency, suggesting that it was an active, nektonic swimmer in Jurassic seas. Its streamlined shell structure allowed it to move easily through the water column while maintaining buoyancy. PALEONTOLOGICAL IMPORTANCELeptosphinctes davidsoni is an important index fossil for the Bajocian stage. Its restricted stratigraphic range, combined with its distinct morphology, allows geologists to define ammonite biozones that are critical for Middle Jurassic stratigraphy. Ammonites like Leptosphinctes are key tools in establishing detailed geological timescales and in correlating marine deposits across wide geographic areas.The fossil also represents the evolutionary diversification of the Perisphinctidae family during the Middle Jurassic. Its delicate ribbing and elegant coiling highlight the evolutionary experiments in shell design that characterised ammonites, making them one of the most successful marine organisms of their era. COLLECTOR’S AND EDUCATIONAL VALUEThis Leptosphinctes davidsoni ammonite fossil is a rare and valuable specimen from Frogden Quarry, a classic Dorset locality. With its fine preservation and elegant ribbing, it is both scientifically important and aesthetically appealing. Collectors of Jurassic ammonites will appreciate its rarity and provenance, while educators and students can use it as a tangible example of ammonite evolution and stratigraphic utility in the Bajocian stage. GUARANTEE OF AUTHENTICITY
• 100% genuine Leptosphinctes davidsoni ammonite fossil
• Supplied with a Certificate of Authenticity
• The exact specimen shown in the photographs is the one you will receiveThis is a rare opportunity to acquire a scientifically significant and beautifully preserved Leptosphinctes davidsoni Ammonite Fossil from the Bajocian of Frogden Quarry, Sherborne, Dorset, UK, a classic specimen from Britain’s Jurassic heritage.
