Ichthyosaur Vertebrae Fossil Polished Block Jurassic Lyme Regis Dorset UK Specimen

Description

Ichthyosaur Vertebrae Fossil Polished Display Block from Lyme Regis

This striking fossil specimen features Ichthyosaur vertebrae preserved within a polished display block, originating from the famous Black Ven Marls of the Lower Lias Formation at Black Ven, Lyme Regis, Dorset, United Kingdom. These deposits form part of the Jurassic Coast UNESCO World Heritage Site, one of the most important fossil-bearing coastlines in the world.

The specimen contains authentic vertebrae from a Jurassic marine reptile known as an ichthyosaur, a fast-swimming predator that lived in the oceans during the Early Jurassic period approximately 201–174 million years ago. The fossil has been prepared as a polished block, allowing the internal structure of the vertebrae to be clearly visible while creating an attractive and durable display specimen.

The photographs in the listing show the exact fossil specimen you will receive, carefully chosen for its preservation and visual appeal. The fossil includes a Certificate of Authenticity with a lifetime guarantee card, confirming that the specimen is genuine.

Full sizing is available in the listing photographs.

Geological Origin – Black Ven Marls, Lyme Regis

This fossil originates from the Black Ven Marls, part of the Lower Lias Group exposed along the cliffs of Lyme Regis in Dorset. These sediments were deposited during the Early Jurassic Period, particularly within the Hettangian and Sinemurian stages, when southern Britain was covered by a warm, shallow sea.

The rocks consist primarily of fine marine mudstones and marls, which accumulated slowly on the seabed under relatively calm conditions. Periodic low-oxygen environments helped preserve organic remains, leading to the exceptional fossil record found along the Jurassic Coast.

Black Ven is internationally famous for its fossil discoveries and played a major role in the development of palaeontology. Early fossil collectors such as Mary Anning uncovered many important marine reptile fossils in this area, including some of the first scientifically described ichthyosaurs.

Ichthyosaurs – Marine Reptiles of the Jurassic Seas

Ichthyosaurs were highly specialised marine reptiles adapted for life in open ocean environments. Their name means “fish lizard,” reflecting their fish-like body shape despite being reptiles.

Taxonomic classification of ichthyosaurs:

• Phylum: Chordata
• Class: Reptilia
• Order: Ichthyosauria

Ichthyosaurs evolved streamlined bodies with powerful tails, paddle-like limbs, and large eyes adapted for hunting in marine environments. They were among the dominant predators of Jurassic seas and fed primarily on fish, cephalopods such as ammonites and belemnites, and other marine animals.

Species from the Lower Lias of Lyme Regis often belong to genera such as Ichthyosaurus, Temnodontosaurus, and Leptonectes, which are well documented from this region.

Morphology of Ichthyosaur Vertebrae

The vertebrae preserved in this polished block are typical of ichthyosaur skeletal anatomy. Ichthyosaur vertebrae are easily recognised by their circular, disc-like shape, a structural adaptation that provided both flexibility and strength to the animal’s spine during powerful swimming.

Key features visible in vertebrae fossils include:

• Amphicoelous vertebral centra, meaning both sides of the vertebra are concave
• A flattened, disc-shaped form allowing flexibility along the spine
• Dense bone structure adapted for strong muscular attachment
• Central depressions that once housed cartilage between vertebrae

These vertebrae formed part of a highly flexible spinal column that enabled ichthyosaurs to swim with powerful lateral tail movements similar to modern dolphins.

The polishing of the block enhances the fossil by revealing the natural bone structure and internal textures while preserving the surrounding Jurassic sediment.

Jurassic Marine Ecosystem of the Lyme Regis Coast

During the Early Jurassic, the seas surrounding Lyme Regis supported a rich marine ecosystem. Fossils from the Black Ven Marls commonly include:

• Ammonites
• Belemnites
• Bivalves
• Crinoids
• Marine reptiles including ichthyosaurs and plesiosaurs

Ichthyosaurs were among the top predators in this ecosystem, using their speed and keen vision to hunt within the open water column. Their remains occasionally sank to the seabed after death, where rapid burial in fine sediment preserved parts of their skeletons.

These fossil-bearing rocks provide an exceptional record of marine life from over 190 million years ago.

Authentic Jurassic Marine Reptile Fossil

This polished vertebrae block represents a fascinating piece of Jurassic marine reptile history from one of the most famous fossil localities in the world. Fossils from the Lyme Regis coastline are highly valued for both their scientific significance and their connection to the history of fossil discovery.

Key features of this specimen:

• Genuine Ichthyosaur vertebrae fossil
• Preserved in a polished display block
• From the Black Ven Marls, Lower Lias Formation
• Collected at Black Ven, Lyme Regis, Dorset, UK
• The photographs show the actual fossil specimen you will receive
• Supplied with a Certificate of Authenticity and lifetime guarantee

This impressive fossil is ideal for fossil collectors, Jurassic Coast enthusiasts, marine reptile displays, geology collections, or natural history study, providing a tangible connection to the ancient oceans of the Early Jurassic world.