Rare Leptechioceras subplicatum Ammonite Fossil Jurassic Radstock UK Genuine Authentic COA

Description

Authentic Jurassic Fossil from Radstock, UK

This rare Leptechioceras subplicatum ammonite fossil is a genuine specimen from the Upper Sinemurian stage of the Early Jurassic, collected in Radstock, Somerset, United Kingdom. A carefully chosen example, it highlights the fine ribbing and elegant whorl structure that define this species. The photographs show the exact fossil you will receive, with a 1 cm scale cube included for accurate size reference. Every specimen comes with a Certificate of Authenticity, confirming its provenance and authenticity.

Geological Age and Provenance

Formed approximately 197–190 million years ago, during the Upper Sinemurian stage of the Lower Jurassic, this ammonite provides a direct connection to the early diversification of cephalopods following the end-Triassic extinction. Radstock lies within one of Britain’s most fossiliferous regions, where Lower Lias mudstones and silts preserved ammonites in remarkable detail. These shallow marine sediments were deposited in the northern reaches of the Tethys Ocean, creating perfect conditions for fossilisation. The ammonite-bearing horizons of this region are globally significant, offering insights into early Jurassic marine ecosystems.

Species Identification and Classification

Leptechioceras subplicatum belongs to the class Cephalopoda, order Ammonitida, superfamily Eoderoceratoidea, and family Echioceratidae. This genus is known for its small to medium-sized ammonites with compressed shells and finely ornamented ribbing. The specific epithet subplicatum reflects the subtle folding and rib patterns seen in this species, which help paleontologists distinguish it from other closely related taxa. These features make it both scientifically valuable and visually distinctive, appealing to collectors and researchers alike.

Morphology and Distinctive Traits

This specimen shows the diagnostic traits of Leptechioceras subplicatum, including a compressed, planispiral shell with elegant ribbing that runs symmetrically across the flanks. The ribs are fine and closely spaced, producing a delicate texture across the whorls. The shell is slender and tightly coiled, giving the fossil an elegant appearance. These features represent adaptations for life in shallow marine waters, where buoyancy and hydrodynamic efficiency would have been essential. The ribbing also reinforces the shell, adding structural strength against water pressure and predators.

Scientific and Stratigraphic Importance

Leptechioceras subplicatum is significant as it appears within the Upper Sinemurian ammonite faunas that help define key Jurassic biozones. Ammonites such as this are used as index fossils, enabling geologists to date and correlate strata across different regions. This species provides vital information on evolutionary patterns within the Echioceratidae family, helping researchers reconstruct the early Jurassic seas of Europe. For collectors, a fossil like this represents not just a natural wonder but also a scientifically important marker in Earth’s geological record.

Condition and Presentation

The fossil has been carefully prepared to ensure its features are preserved and clearly visible. Ribbing, shell curvature, and whorl structure are sharply defined, making this a fine example of the species. It is a unique, one-of-a-kind specimen—not a replica or cast. The images provided show the actual ammonite you will receive, giving full transparency and assurance of authenticity.

Guarantee of Authenticity

All of our fossils are 100% genuine specimens, responsibly sourced and scientifically identified. Each specimen comes with a Certificate of Authenticity. This rare Leptechioceras subplicatum ammonite fossil from Radstock is an excellent addition for fossil collectors, natural history enthusiasts, and educational collections, offering a direct link to the seas of the Early Jurassic.