Description
Genuine Hybodus minor Dorsal Fin Spine Fossil
This listing is for a genuine Hybodus minor dorsal fin spine fossil preserved in a natural block from the famous fish, reptile and coprolite bed at Aust Cliff, Bristol, UK. The specimen comes from the Westbury Formation, part of the Penarth Group, and dates to the Upper Triassic. This is a carefully chosen fossil piece, selected for its natural character, geological interest and display appeal.
The photograph shows the actual specimen you will receive, so you can buy with confidence knowing exactly which fossil is being supplied. Full sizing and scale details can be seen in the photo. Your specimen was discovered by our own team members, Alister and Alison, and has been carefully cleaned, prepped and treated by Alison. It is supplied with a Certificate of Authenticity lifetime guarantee generic card, confirming that this is a genuine fossil specimen.
About Hybodus minor
Hybodus minor was an extinct hybodont shark, part of an ancient group of shark-like cartilaginous fishes that lived long before modern sharks became dominant in the oceans. Hybodonts were successful Mesozoic predators and scavengers, with a body plan adapted for life in marine and coastal waters. They are especially well known from teeth and fin spines, as the cartilage of the skeleton is much less commonly preserved than harder mineralised parts.
Hybodus belongs to the family Hybodontidae within the order Hybodontiformes. These prehistoric sharks had a varied dentition, often combining sharper grasping teeth with broader crushing teeth, suggesting they could feed on a range of prey including fish, shelled animals and other small marine organisms. Their fin spines are among the most distinctive fossil remains of the group and make excellent display specimens for collectors of shark fossils and vertebrate fossils.
Dorsal Fin Spine Features
This specimen represents a dorsal fin spine, an important anatomical feature of Hybodus. In life, the spine would have projected from the front of the dorsal fin, helping to protect the animal from predators and possibly contributing to fin stability. These spines were robust, elongated structures and are often more distinctive than isolated fragments of bone or tooth material from the same deposits.
Hybodont dorsal fin spines may show ridges, grooves or surface texture depending on preservation. A fin spine fossil preserved in its original matrix block is especially appealing because it retains the natural context of the fossil-bearing layer. Rather than being a loose isolated piece, this specimen remains part of the famous Aust Cliff bone bed material, giving it strong geological character.
Aust Cliff Fish, Reptile and Coprolite Bed
Aust Cliff, near Bristol, is one of Britain’s classic fossil localities for Upper Triassic vertebrate fossils. It is particularly famous for its fish, reptile and coprolite bed, a fossil-rich bone bed that has produced shark material, fish teeth, reptile bones, fin spines, scales, coprolites and other remains from ancient marine animals.
These bone beds formed when durable remains such as teeth, bones, spines and coprolites became concentrated on the seabed by currents, storms and natural reworking. Over millions of years, the material was buried, mineralised and preserved within the rock. Fossils from Aust Cliff are prized by collectors because they preserve a fascinating record of Late Triassic marine life from a classic British locality.
Westbury Formation and Upper Triassic Age
The fossil comes from the Westbury Formation of the Penarth Group, a geological unit associated with the latest part of the Triassic Period. These deposits are commonly linked with the Rhaetian Stage of the Upper Triassic, shortly before the beginning of the Jurassic Period.
During this time, the Bristol region formed part of a shallow marine to coastal environment. The ancient waters supported a diverse ecosystem of hybodont sharks, bony fish, marine reptiles and other animals. Fossil remains from this horizon provide an important glimpse into prehistoric life at a major transition in Earth history, close to the Triassic-Jurassic boundary.
Collectable British Triassic Shark Fossil
This Hybodus minor dorsal fin spine fossil from Aust Cliff is a desirable specimen for collectors of British fossils, shark fossils, Triassic fossils, vertebrate fossils, bone bed material and natural history display pieces. Its provenance from Aust Cliff, Bristol, together with the Westbury Formation and Penarth Group origin, gives it excellent geological context and strong collectable appeal.
With its genuine Upper Triassic age, matrix block preservation, classic UK fossil locality and included Certificate of Authenticity lifetime guarantee generic card, this Hybodus minor fin spine fossil is a fascinating display piece from the ancient seas of prehistoric Britain.
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