Description
Genuine Dalmanites Trilobite Fossil from Wenlock Edge, Shropshire
This authentic Dalmanites sp. trilobite fossil originates from the renowned Much Wenlock Limestone Formation at Wenlock Edge in Shropshire, United Kingdom, and dates to the Silurian Period during the Homerian Stage, approximately 430 million years ago. Trilobites are among the most famous and scientifically significant fossils, representing extinct marine arthropods that thrived in the oceans for hundreds of millions of years.
This specimen comes from an ex-collection, adding additional historical character and provenance to the fossil. The trilobite preserved within the rock represents an ancient marine creature that once lived in warm tropical seas that covered much of what is now Britain.
The photographs show the exact fossil you will receive, carefully chosen for collectors who appreciate authentic and historically important fossil material. The specimen includes 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 they display the actual specimen available.
Geological Origin – Much Wenlock Limestone Formation
The fossil originates from the Much Wenlock Limestone Formation, a well-known Silurian rock unit exposed along Wenlock Edge in Shropshire. These limestones formed during the Homerian Stage of the Silurian Period, when Britain was located near the equator and submerged beneath warm, shallow tropical seas.
The Wenlock limestone developed within reef and carbonate shelf environments, where marine organisms produced vast quantities of carbonate sediment. Over time, these sediments accumulated and hardened into limestone while preserving the remains of marine life.
The Wenlock Edge fossil deposits contain a rich variety of marine fossils including:
- Trilobites
- Brachiopods
- Corals and stromatoporoid reef sponges
- Crinoids and echinoderms
- Molluscs and gastropods
These rocks represent an ancient Silurian reef ecosystem, one of the earliest complex marine communities preserved in the fossil record.
Dalmanites Trilobites – Silurian Marine Arthropods
The fossil belongs to the genus Dalmanites, a well-known group of trilobites common in Silurian and Ordovician marine deposits. Trilobites were arthropods related to modern crustaceans and insects, characterised by their segmented bodies and calcified exoskeletons.
Scientific Classification
- Kingdom: Animalia
- Phylum: Arthropoda
- Class: Trilobita
- Order: Phacopida
- Family: Dalmanitidae
- Genus: Dalmanites
The genus Dalmanites was named by the French palaeontologist Emile Barrande in the 19th century, in honour of Swedish naturalist Johan Wilhelm Dalman, reflecting the long history of scientific research into trilobite fossils.
Members of the Dalmanitidae family are often recognised by their streamlined bodies and sometimes elongated pygidial spines.
Morphology and Distinctive Trilobite Features
Trilobites are named for their distinctive three-lobed body plan, consisting of a central axial lobe flanked by two pleural lobes. The body is divided into three main regions:
- Cephalon (head shield)
- Thorax (articulated segments)
- Pygidium (tail shield)
Characteristic features commonly seen in Dalmanites trilobites include:
- A broad, semi-circular cephalon with a prominent glabella
- Well-developed compound eyes positioned on the head
- Multiple articulated thoracic segments allowing flexibility
- A distinct pygidium sometimes ending in a short spine
- Fine exoskeletal ornamentation and segmentation
These features allowed trilobites to move efficiently across the sea floor and, when threatened, to roll up into a protective enrolled position.
Silurian Reef Ecosystem
During the Silurian Period, marine ecosystems expanded dramatically following earlier extinction events. The warm shallow seas of the Wenlock region supported diverse communities of reef-building organisms and invertebrates.
The marine environment around Wenlock Edge likely included:
- Coral and stromatoporoid reef structures
- Brachiopods attached to the seabed
- Crinoids filtering plankton from the water
- Molluscs and gastropods grazing across sediment
- Trilobites scavenging or feeding on organic particles
Trilobites such as Dalmanites were primarily benthic organisms, living along the sea floor where they fed on detritus or small invertebrates.
Fossil Preservation
The trilobite exoskeleton was composed of calcite and chitin, which allowed it to fossilise readily when buried in sediment. After the animal died, its remains settled on the seabed and were rapidly covered by carbonate sediment produced by reef organisms.
Over millions of years, these sediments hardened into limestone while preserving the trilobite’s skeletal structure. The fossil now visible within the rock represents a direct record of life from a Silurian sea over 430 million years ago.
The preservation within the Wenlock limestone often allows the trilobite’s anatomical structure and segmentation to remain clearly visible.
Certificate of Authenticity
This fossil specimen includes a Certificate of Authenticity lifetime guarantee generic card, confirming the trilobite is a genuine fossil.
Each specimen is carefully selected to ensure collectors receive authentic fossil material suitable for study, display, or collection.
A Classic British Trilobite from Wenlock Edge
Wenlock Edge is one of the most famous Silurian fossil localities in the United Kingdom, producing specimens that have been studied by palaeontologists for over two centuries. Trilobites from this region are especially prized for their historical and geological significance.
This Dalmanites trilobite fossil from the Much Wenlock Limestone of Shropshire represents a remarkable piece of early marine life preserved from the Silurian seas that once covered Britain, making it an outstanding addition to any fossil collection, natural history display, or geological cabinet.
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