Description
Genuine Turritella Fossil Gastropod
This carefully chosen fossil is a genuine Turritella sp. gastropod from the London Clay Formation at Bognor Regis, West Sussex, UK. Dating from the Ypresian Stage of the Early Eocene, it represents a marine snail that lived approximately 48 to 56 million years ago, when southern England lay beneath a warm, subtropical sea.
The listing photographs show the actual fossil specimen you will receive. This is not a stock photograph or a representative example. Please examine all images carefully for the fossil’s precise shape, natural colour, preservation, visible shell ornamentation and surrounding London Clay matrix. For full sizing and scale, please refer to the photographs.
Fossil Identification and Classification
Scientific identification: Turritella sp.
Fossil type: Gastropod or fossil marine snail
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Sorbeoconcha
Superfamily: Cerithioidea
Family: Turritellidae
Genus: Turritella
Geological period: Palaeogene
Epoch: Eocene
Stage: Ypresian
Rock unit: London Clay Formation
Locality: Bognor Regis, West Sussex, United Kingdom
The abbreviation “sp.” indicates that the fossil has been identified confidently as belonging to the genus Turritella, while a precise species-level identification has not been assigned. Fossil gastropods are often preserved with part of the shell concealed by matrix, compressed, weathered or represented as natural internal moulds, making genus-level identification appropriate for many specimens.
The genus Turritella was formally established by Jean-Baptiste Lamarck in 1799. Its name refers to the turret-like shape of the shell, a distinctive form produced by numerous whorls arranged around a tall central axis.
Turritella Shell Morphology
Turritella gastropods are recognised by their elongated, high-spired shells. The shell is constructed from a sequence of tightly coiled whorls that gradually increase in size from the pointed apex towards the larger body whorl. This creates a narrow, conical or tower-shaped profile that is readily recognisable in both living and fossil representatives.
Each whorl is separated from the next by a visible groove called a suture. Depending on preservation, the shell surface may display spiral ridges, fine cords, growth lines or combinations of stronger and weaker ornamentation. These features developed as the shell grew and can help palaeontologists distinguish between related gastropod groups.
The final body whorl housed most of the animal’s soft tissues, while the aperture provided the opening through which the head and muscular foot extended. The foot enabled the living gastropod to move across or partly within soft seabed sediment. The shell protected the animal from predators, physical disturbance and shifting sediment.
Natural matrix coverage, incomplete whorls, shell loss, compression, mineral staining, small fractures and weathered areas are normal characteristics of genuine London Clay fossils. These features form part of the specimen’s geological history and demonstrate its natural origin.
London Clay Formation Geology
The London Clay Formation is one of Britain’s most famous fossil-bearing geological units. It was deposited during the Early Eocene across the London and Hampshire basins and consists mainly of marine clay, silty clay and sandy sediments. At Bognor Regis, coastal exposures reveal parts of this important succession and have produced a diverse assemblage of fossil plants, molluscs, crustaceans, fish, sharks, turtles and other marine organisms.
The formation developed as fine sediment accumulated in a broad marine basin. Much of the clay originated as extremely small mineral particles transported from nearby land and deposited in relatively calm water. Periodic changes in current strength, storm activity and sediment supply produced siltier or sandier horizons within the sequence.
London Clay fossils are frequently preserved within compact clay, phosphatic material, pyritised patches or calcareous concretions. Shells may retain original material, become mineralised or dissolve after burial and leave natural moulds. Gastropods can therefore display a range of preservation styles, from detailed shell surfaces to internal casts recording the shape of the original shell cavity.
Ypresian Marine Environment
The Ypresian was the earliest stage of the Eocene Epoch and was marked by a generally warm global climate. Southern Britain experienced subtropical conditions, with lush vegetation growing on nearby land and warm seas occupying the sedimentary basins.
The sea represented by the London Clay Formation was connected to the North Atlantic region and supported a rich marine ecosystem. The seabed included areas of soft mud and silt inhabited by gastropods, bivalves, worms, crustaceans and other bottom-dwelling organisms. Sharks, rays, bony fish, turtles and occasional marine mammals occupied the surrounding waters.
Turritella was adapted to life on soft sediment and was probably a suspension feeder or deposit-associated feeder. Living turritellids often remain partly buried with the shell positioned at an angle or almost vertically in the seabed. Water currents carry microscopic food particles and organic matter towards the animal, allowing it to feed while remaining relatively stationary.
The tall shell shape provided space for the internal organs while maintaining a narrow footprint within the sediment. Large populations of turritellid gastropods can occur where seabed conditions, food supply and water movement were particularly favourable.
Fossilisation in the London Clay
After the gastropod died, its soft tissues decayed and the shell settled onto the muddy seafloor. Fine sediment could rapidly enter the aperture and fill the shell interior. Continued burial protected the remains from surface erosion and scavenging.
Over millions of years, the surrounding mud compacted into clay-rich rock. Mineral-rich groundwater altered both the shell and its matrix. In some specimens, the original calcium carbonate shell remains partly preserved. In others, it has recrystallised, dissolved or been replaced, leaving a natural internal mould or external impression.
Every fossil records a unique sequence of biological and geological events. Variations in shell completeness, exposed whorls, ornamentation, colour, matrix and mineralisation make each Turritella specimen individually collectable.
Collectable British Eocene Fossil
This genuine Turritella fossil combines a classic tower-shaped marine gastropod with the renowned Eocene geology of Bognor Regis and the London Clay Formation. It would make an excellent addition to a British fossil collection, gastropod display, Palaeogene cabinet, London Clay collection or educational geological resource.
The specimen is also suitable as a distinctive natural-history gift for a fossil collector, palaeontology enthusiast, geology student, teacher or anyone interested in prehistoric marine life. Its recognisable spiral form provides a direct connection with the warm seas that covered southern England during the Early Eocene.
Actual Specimen and Full Sizing
The fossil shown in the listing photographs is the exact specimen you will receive. It has been carefully selected for its natural appearance, recognisable gastropod form and geological interest.
Please refer to the photographs for full sizing. The images provide the most accurate representation of the specimen’s dimensions, condition, visible whorls, preservation and remaining London Clay matrix.
Certificate of Authenticity and Lifetime Guarantee
This fossil is a genuine natural specimen and includes a generic Certificate of Authenticity card with a lifetime authenticity guarantee. The certificate confirms that the item is supplied as a real fossil rather than a modern cast, replica or artificial reproduction.
The specimen will be carefully and securely packaged to help protect its fossil surfaces and surrounding matrix during transit.
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