Fossil Gastropod Pleurotomaria Jurassic Blue Lias Pinhay Bay Devon UK Specimen

Description

Jurassic Pleurotomaria Gastropod Fossil from Pinhay Bay, Devon

This beautifully preserved fossil gastropod of the genus Pleurotomaria comes from the famous Blue Lias Formation at Pinhay Bay, Devon, on the iconic Jurassic Coast of the United Kingdom. This genuine specimen has been carefully discovered by our team members Alister and Alison, and expertly cleaned, prepared, and treated by Alison to reveal its natural structure and detail. The photograph provided shows the exact fossil you will receive, ensuring complete confidence in your purchase.

Geological Setting – Blue Lias Formation, Early Jurassic

The Blue Lias Formation is one of the most significant Lower Jurassic geological units in the UK, dating to approximately 201–190 million years ago. It consists of alternating layers of limestone and shale, deposited in a shallow marine environment during the early Jurassic period. Pinhay Bay is renowned for its fossil-rich exposures, where marine life was rapidly buried by fine sediments, preserving delicate shells and skeletal remains in remarkable detail.

This depositional environment was part of a warm, shallow sea that supported a diverse ecosystem including ammonites, bivalves, echinoderms, and gastropods. The fine-grained sediments of the Blue Lias allowed for exceptional fossil preservation, making it one of the most important sites for studying early Jurassic marine life.

Fossil Type and Classification

Pleurotomaria is a genus of ancient marine gastropods belonging to the class Gastropoda, a group that includes modern snails and sea snails. These fossils are part of an early lineage of vetigastropods, known for their distinctive shell morphology and evolutionary significance. Fossils of Pleurotomaria are highly valued due to their elegant spiral form and their role in understanding the development of gastropod lineages through geological time.

Morphological Features and Shell Structure

This specimen displays the classic high-spired, coiled shell typical of Pleurotomaria, with clearly defined whorls and a smooth to subtly ornamented surface. One of the defining features of this genus is the presence of a selenizone—a distinctive slit or band along the whorl that functioned as an exhalant channel for water flow. This feature is a key identifying characteristic and provides insight into the functional anatomy of these early gastropods.

The shell’s natural curvature and symmetry are well preserved, allowing for clear observation of growth patterns and structural development. The fossil retains a strong three-dimensional form, enhancing its visual appeal as a display piece.

Discovery, Preparation, and Provenance

This fossil was discovered by our experienced team members Alister and Alison along the historic coastline of Pinhay Bay. Following its recovery, the specimen was carefully cleaned, prepped, and treated by Alison to stabilise and enhance its natural features while preserving its authenticity. This direct provenance adds significant value and ensures the fossil’s integrity and traceable origin.

Authenticity and Certificate of Guarantee

This is a genuine fossil specimen and includes a Certificate of Authenticity lifetime guarantee card. Each fossil is handled with care to maintain its natural condition, providing assurance of its authenticity and quality.

Ideal for Collectors, Display, and Education

A Pleurotomaria gastropod fossil from the Blue Lias is a classic addition to any fossil collection. Its elegant spiral form, combined with its geological significance, makes it ideal for collectors, educators, and enthusiasts. Whether displayed in a cabinet, study, or teaching environment, it offers a tangible connection to early Jurassic marine life.

Size and Exact Specimen Assurance

Please refer to the photograph for full sizing and scale. The fossil shown is the exact specimen you will receive, ensuring you know precisely what you are adding to your collection.