Description
Ichthyosaur Jaw Section with Teeth – Jurassic Coast, Lyme Regis, Dorset
This exceptional Ichthyosaur jaw section with multiple preserved teeth is a genuine fossil specimen from the famous Black Ven Marls of Lyme Regis, located along the UNESCO World Heritage Jurassic Coast in Dorset, UK. Dating to the Lower Lias of the Early Jurassic period, approximately 201–174 million years ago, this fossil represents a rare and highly sought-after example of marine reptile anatomy.
Carefully selected for its quality and scientific importance, this specimen displays a section of jawbone with several intact teeth, offering a powerful visual insight into one of the ocean’s most formidable prehistoric predators. The exact fossil shown in the photographs is the one you will receive and includes a Certificate of Authenticity lifetime guarantee generic card.
Geological Context – Black Ven Marls, Lower Lias Formation
The Black Ven Marls are part of the Lower Jurassic Lias Group, a sequence of clay-rich marine sediments deposited in a shallow sea environment that once covered much of southern England. These deposits are world-renowned for their exceptional fossil preservation, particularly of marine reptiles such as Ichthyosaurs, as well as ammonites and other marine organisms.
Formed during the Early Jurassic, these sediments accumulated in a low-energy marine setting, allowing fine muds to settle and gently bury organic remains. Periodic anoxic conditions at the seabed reduced decay and scavenging, enabling the preservation of delicate skeletal structures, including articulated bones and teeth.
Fossil Identification – Ichthyosaur (Order: Ichthyosauria)
Ichthyosaurs were highly adapted marine reptiles belonging to the order Ichthyosauria. They evolved streamlined, fish-like bodies with powerful tails and elongated jaws filled with conical teeth, perfectly suited for capturing fast-moving prey.
This fossil represents a section of the jaw containing multiple teeth, which are typically slender, conical, and slightly curved. These teeth were designed for grasping fish and cephalopods rather than crushing, indicating a predatory lifestyle focused on swift, agile prey.
Ichthyosaurs were among the dominant marine predators of the Early Jurassic seas, and their fossils are some of the most iconic discoveries from the Lyme Regis area.
Morphology and Notable Features
This specimen displays key anatomical features associated with Ichthyosaur jaw material:
- Partial jawbone with multiple embedded teeth
- Conical tooth morphology adapted for grasping prey
- Natural alignment of teeth within the jaw structure
- Visible bone texture and fossilisation patterns
- Preservation within original Jurassic matrix
The presence of multiple teeth within a single jaw section significantly enhances both the scientific and display value of the specimen, providing a more complete representation of feeding anatomy.
Depositional Environment and Fossil Formation
During the Early Jurassic, the Lyme Regis region was submerged beneath a warm, shallow sea rich in marine biodiversity. Ichthyosaurs occupied the role of apex predators, hunting fish, squid-like cephalopods, and other marine organisms.
After death, skeletal remains would settle onto the seabed and become buried by fine sediment. Rapid burial, combined with low oxygen conditions, limited decomposition and allowed bones and teeth to remain intact.
Over millions of years, mineralisation replaced the original organic material, preserving the fossil in stone. The Black Ven Marls are particularly known for preserving articulated marine reptile remains, making this specimen part of a globally significant fossil assemblage.
Scientific and Collecting Significance
Ichthyosaur fossils from Lyme Regis are among the most historically important in palaeontology, with early discoveries contributing significantly to our understanding of prehistoric marine reptiles. Specimens featuring both bone and teeth are especially desirable, as they provide direct insight into anatomy and feeding behaviour.
The Jurassic Coast continues to be one of the most productive and scientifically important fossil localities in the world, and fossils from this region are highly prized by collectors and institutions alike.
Authenticity and Presentation
This fossil is a 100% genuine Ichthyosaur jaw section with teeth and includes a Certificate of Authenticity lifetime guarantee generic card. The fossil shown in the photographs is the exact specimen you will receive.
Full sizing can be confirmed via the listing images, allowing you to clearly assess the scale and detail of the fossil.
Ideal for Collectors, Display, or Educational Use
This Ichthyosaur jaw fossil is an outstanding addition to any fossil collection, offering a rare combination of anatomical detail, geological significance, and visual impact. Perfect for collectors, educators, or as a unique display piece, it represents a genuine fragment of Jurassic marine life from one of the most famous fossil localities in the world.
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