Description
Genuine Cyphaspis elachopos Trilobite Fossil from Wren’s Nest, Dudley
This authentic Cyphaspis elachopos trilobite fossil originates from the famous Much Wenlock Limestone Formation at Wren’s Nest, Dudley, West Midlands, UK, a classic British fossil locality renowned for its exceptionally preserved Silurian marine life. Dating to the Silurian Period during the Homerian Stage, approximately 430 million years ago, this fossil represents an ancient arthropod that once lived in warm tropical seas covering what is now central England.
The fossil shown in the photographs is the exact specimen you will receive, carefully chosen for its natural detail and collector appeal. The specimen comes with a Certificate of Authenticity lifetime guarantee generic card, confirming that the fossil is genuine.
Please refer to the photographs for full sizing and scale, as the images show the actual fossil specimen available for purchase.
Geological Context – The Much Wenlock Limestone Formation
The Much Wenlock Limestone Formation is one of Britain’s most historically important fossil-bearing rock units. It formed during the Silurian Period when much of the British Isles lay beneath a shallow tropical sea located near the equator.
The limestone at Wren’s Nest in Dudley was deposited within a warm, shallow marine reef environment, rich in biodiversity. Coral reefs, stromatoporoid sponges, and a wide range of marine invertebrates flourished within this ecosystem, creating carbonate sediments that later lithified into limestone.
This formation is particularly famous for preserving a diverse marine fauna including:
- Trilobites
- Brachiopods
- Corals
- Crinoids
- Gastropods
- Orthocone nautiloids
The Wren’s Nest locality has been studied by geologists and palaeontologists for centuries and is considered one of the most significant Silurian fossil sites in the United Kingdom.
Species Identification and Scientific Classification
Cyphaspis elachopos is a species of trilobite belonging to the order Proetida, a group of trilobites known for their relatively small size and distinctive spiny ornamentation.
Scientific Classification
- Kingdom: Animalia
- Phylum: Arthropoda
- Class: Trilobita
- Order: Proetida
- Superfamily: Aulacopleuroidea
- Family: Aulacopleuridae
- Genus: Cyphaspis
- Species: Cyphaspis elachopos
Trilobites of the genus Cyphaspis are recognised for their intricate morphology and often elaborate spines, which may have served defensive or sensory purposes within ancient marine environments.
Morphology and Distinctive Features
Trilobites possess a characteristic three-lobed body structure, from which their name is derived. The body is divided into three main sections: the cephalon (head), thorax, and pygidium (tail).
Notable morphological features of Cyphaspis trilobites often include:
- A well-defined glabella (central lobe on the head)
- Prominent compound eyes
- Multiple articulated thoracic segments
- A relatively small pygidium
- Fine surface ornamentation or spines typical of proetid trilobites
These anatomical features allowed trilobites to move efficiently across the sea floor and, in many species, to enrol their bodies for protection when threatened by predators.
The preserved fossil reflects the mineralised exoskeleton of the animal, which was originally composed of calcite and chitin.
Silurian Marine Ecosystem
During the Silurian Period, marine ecosystems experienced a major expansion in biodiversity following the earlier Ordovician extinction events. Shallow tropical seas became populated by complex reef systems and diverse invertebrate communities.
The reef environments represented by the Much Wenlock Limestone supported numerous organisms including:
- Rugose and tabulate corals
- Stromatoporoid reef sponges
- Brachiopods
- Echinoderms such as crinoids
- Trilobites and other arthropods
Trilobites like Cyphaspis were primarily benthic organisms, living on or near the sea floor where they fed on small organisms, detritus, or organic particles within the sediment.
Fossil Preservation
The limestone sediments of the Wenlock sea provided ideal conditions for fossil preservation. Organisms living within reef environments were often rapidly buried by carbonate sediments, protecting them from scavenging and decay.
Over hundreds of millions of years, the original exoskeleton of the trilobite became mineralised and preserved within the limestone. This natural fossilisation process allows collectors today to observe the structure of an animal that lived more than 430 million years ago.
The fossil retains the natural character of the specimen as it was preserved within the rock matrix of the Dudley limestone.
Certificate of Authenticity
This fossil is supplied with a Certificate of Authenticity lifetime guarantee generic card, confirming that the specimen is a genuine fossil.
Each specimen is carefully selected to ensure authenticity and quality for collectors and natural history enthusiasts.
A Classic Dudley Trilobite for Fossil Collectors
The Wren’s Nest at Dudley has long been regarded as one of Britain’s most important fossil localities and is historically associated with the famous Dudley Bug trilobites. Specimens from this site are highly sought after by collectors due to their scientific significance and historic geological context.
This Cyphaspis elachopos trilobite fossil represents a remarkable piece of Silurian marine history and offers a tangible connection to the tropical seas that once covered the Midlands over 430 million years ago. It makes an excellent addition to any fossil collection, natural history display, or educational geological set.






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