9.5in Cenoceras Nautilus Fossil Lyme Regis Dorset Lower Jurassic Bucklandi Zone Rare Large Display Specimen Premium COA Included

Description

Genuine 9.5″ Lyme Regis Nautilus Fossil – Rare Cenoceras cf. obesum Specimen

Offered here is an outstanding and extremely collectible 9.5 inch Nautilus fossil, scientifically identified as Cenoceras cf. obesum, from the world-famous fossil coastline of Monmouth Beach, Lyme Regis, Dorset, England. Large nautiloid fossils of this quality and size are genuinely rare from the Lower Jurassic, making this specimen an exceptional opportunity for serious collectors.

This is a carefully chosen piece, selected for its impressive size, strong preservation, and museum-level display appeal. The photographs show the exact fossil you will receive, with full sizing clearly visible in the provided images.

Every fossil we offer is a genuine specimen, and this fossil includes a fully hand-signed Premium Certificate of Authenticity, providing lifetime assurance of provenance and authenticity.

Geological Setting – Bucklandi Zone, Lower Lias, Lower Jurassic

This fossil originates from the Lower Lias Formation, specifically within the famous Bucklandi Zone, dating to approximately 195–200 million years ago during the earliest part of the Jurassic Period. At this time, Lyme Regis lay beneath a warm shallow sea, supporting abundant marine life including ammonites, belemnites, fish, marine reptiles, and rare nautiloids such as Cenoceras.

The sediments of the Lower Lias were deposited in calm offshore marine environments, where fine muds and limestones accumulated on the seabed. Rapid burial events and low oxygen conditions contributed to exceptional fossil preservation, allowing marine shells to survive in remarkable condition for nearly 200 million years.

Monmouth Beach is one of the most famous collecting sites along the UNESCO-listed Jurassic Coast, internationally celebrated for producing fossils of outstanding scientific and historical value.

Fossil Species – Cenoceras cf. obesum Nautilus

Cenoceras is an extinct genus of nautiloid cephalopod belonging to the subclass Nautiloidea, relatives of the modern living nautilus. Unlike ammonites, nautiloids survived the end-Cretaceous extinction and continue today in deep marine environments, making these fossils especially fascinating evolutionary links.

The designation Cenoceras cf. obesum indicates close affinity to the species obesum, a robust Lower Jurassic form known for its thick coiled shell, smooth exterior, and strong internal chamber structure.

Nautiloids possessed a series of internal chambers separated by septa, used for buoyancy control, with the living animal occupying only the final chamber. Fossils such as this provide an extraordinary look into the biology and ecology of Jurassic cephalopods beyond the more commonly found ammonites.

Morphology, Preservation and Display Presence

This specimen’s substantial 9.5 inch diameter makes it a true statement fossil. Large Cenoceras specimens are increasingly difficult to obtain, especially with clear shell form and strong structural preservation.

Notable display features include:

• Impressive large size for the species
• Classic nautiloid coiling and robust shell geometry
• Historical Lower Jurassic provenance from Lyme Regis
• Outstanding collector and museum-quality presentation

This fossil is ideal as a centrepiece for any serious collection, educational setting, or high-end natural history décor.

Premium Authenticity and Collector Confidence

This is a 100% genuine Cenoceras Nautilus fossil from Monmouth Beach, Lyme Regis.

It includes a fully hand-signed Premium Certificate of Authenticity, ensuring complete confidence for collectors and buyers. The fossil shown is the exact specimen you will receive.

Perfect For Collectors, Museums and Unique Gifts

This fossil is ideal for:

• Advanced Jurassic fossil and cephalopod collectors
• Nautilus and nautiloid specialists
• Museum-quality display collections
• Educational palaeontology and geology specimens
• Rare and unforgettable prehistoric gifts

A rare opportunity to own an authentic 9.5 inch Cenoceras cf. obesum Nautilus fossil from the Bucklandi Zone of the Lower Lias at Lyme Regis, preserved from an ancient Jurassic sea nearly 200 million years ago and accompanied by a hand-signed Premium Certificate of Authenticity.