Jurassic Fossil Fish Scales Body Section Lyme Regis Dorset UK Specimen – Charmouth Mudstone Lower Jurassic Fish Fossil Display

Description

Fossil Fish Scales Body Section from the Jurassic Coast

This genuine fossil fish body section preserving scales comes from the Charmouth Mudstone Formation at Lyme Regis, Dorset, United Kingdom, one of the most famous fossil localities in the world and part of the UNESCO-listed Jurassic Coast. The specimen dates to the Lower Jurassic Period, specifically the Sinemurian to Pliensbachian stages, approximately 199 to 183 million years ago.

Fossil fish remains from this formation are important components of the Jurassic marine fossil record. While complete fish skeletons are rare, preserved sections of body scales are relatively more common and provide valuable insights into the anatomy and diversity of early marine vertebrates. This specimen preserves a natural section of the fish body where the overlapping scales remain embedded within the original sedimentary matrix.

The preserved scales form a textured pattern typical of Jurassic marine fish, providing a striking and scientifically interesting fossil display.

Geological Formation of the Charmouth Mudstone

The fossil originates from the Charmouth Mudstone Formation, a sequence of marine sediments deposited during the early part of the Jurassic Period. These rocks form part of the Lower Lias Group, which is widely exposed along the cliffs and beaches between Lyme Regis and Charmouth in Dorset.

The formation consists predominantly of fine-grained marine mudstones and clays that accumulated in a relatively deep offshore marine basin. These sediments settled slowly onto the seabed, burying marine organisms and allowing exceptional fossil preservation.

The Charmouth Mudstone Formation is famous for its diverse fossil assemblage, which includes:

• Ammonites
• Belemnites
• Bivalves
• Marine reptiles such as ichthyosaurs and plesiosaurs
• Fish remains including scales, teeth, and occasional articulated skeletons

Fine sediment deposition combined with low oxygen levels on the seafloor helped preserve delicate organic remains, including fish scales and skeletal fragments.

Fish Classification and Jurassic Marine Vertebrates

During the Early Jurassic, the oceans were populated by numerous species of marine fish, including both bony fishes (Osteichthyes) and cartilaginous fishes (Chondrichthyes) such as sharks and rays.

Many bony fishes of this time belonged to the ray-finned fishes (Actinopterygii), a group that includes the majority of modern fish species. These fishes possessed protective scales composed of bone or enamel-like tissues that helped protect the body while maintaining flexibility for swimming.

The fossilised scales preserved in this specimen represent part of the fish’s dermal armour. When fish died and settled on the seafloor, their soft tissues decomposed while the more durable skeletal and scale elements could become buried and fossilised.

Morphology of Fossil Fish Scales

Fish scales vary in structure depending on the species and evolutionary group. Many Jurassic fish possessed ganoid or cycloid-type scales, which were arranged in overlapping rows across the body.

Common characteristics of fossil fish scale sections include:

• Overlapping plate-like scale arrangement
• Fine surface ornamentation or growth lines
• Slight curvature reflecting the body shape of the fish
• Hard mineralised composition allowing fossil preservation

These scales originally functioned as a protective outer covering while also aiding in hydrodynamics during swimming.

When preserved in sedimentary rock, fish scale clusters can provide important evidence for the presence of fish species even when complete skeletons are not preserved.

Early Jurassic Marine Environment of Lyme Regis

During the Sinemurian to Pliensbachian stages, Lyme Regis lay beneath a shallow epicontinental sea connected to the ancient Tethys Ocean. These waters supported complex marine ecosystems containing fish, ammonites, crustaceans, marine reptiles, and numerous invertebrates.

Fish played a key role in the marine food chain. Smaller species fed on plankton and invertebrates, while larger predatory fish hunted other fish and cephalopods.

When fish died, their remains sank to the seabed where fine mud sediments buried them. Over millions of years, these sediments lithified into the mudstones seen today, preserving fragments of fish anatomy such as scales, teeth, and bone.

Authentic Fossil Specimen

This fossil is a genuine fish scale body section from the Charmouth Mudstone Formation, Lower Jurassic of Lyme Regis, Dorset, UK. The specimen has been carefully selected for quality and display appeal.

The photograph shows the actual fossil specimen you will receive, allowing collectors to clearly observe the preserved scale pattern within the natural rock matrix.

Full sizing please see photo.

Certificate of Authenticity

This fossil includes a Certificate of Authenticity lifetime guarantee generic card, confirming that the specimen is a genuine natural fossil.

Fish fossils from the Jurassic Coast are highly collectible due to their connection with one of the world’s most important fossil localities. A preserved section of fossil fish scales offers a fascinating window into the marine vertebrate life that inhabited the Jurassic seas nearly 200 million years ago and makes an excellent addition to any fossil collection, geological display, or educational exhibit.