Description
Rare Calymene blumenbachii Trilobite from the Silurian of Dudley
This genuine Calymene blumenbachii trilobite, famously known as the “Dudley Bug,” comes from the historic Much Wenlock Limestone Formation at Wren’s Nest, Dudley, West Midlands, United Kingdom. Dating to the Silurian Period, Homerian Stage, approximately 430 million years ago, this classic British fossil represents one of the most iconic trilobite species ever discovered.
The Wren’s Nest locality is internationally renowned for its exceptionally rich Silurian fossil fauna and has been studied by geologists and palaeontologists for over two centuries. Fossils from this site are considered historically significant because they helped shape early understanding of ancient marine ecosystems.
The specimen shown in the photographs is the exact fossil you will receive, carefully selected for its preservation and scientific interest. The fossil includes a Certificate of Authenticity with a lifetime guarantee, confirming the specimen is a genuine natural fossil.
Please refer to the photographs for full specimen sizing and scale.
About Calymene blumenbachii – The Famous Dudley Bug Trilobite
Calymene blumenbachii is one of the most famous trilobite species in the world and has become an emblem of British palaeontology. Trilobites were marine arthropods that lived in Earth’s oceans for over 270 million years, from the Cambrian through to the Permian extinction.
Taxonomic classification:
- Kingdom: Animalia
- Phylum: Arthropoda
- Class: Trilobita
- Order: Phacopida
- Family: Calymenidae
- Genus: Calymene
- Species: Calymene blumenbachii
The species was first described in 1817 by the Welsh geologist William Daniel Conybeare, who named it in honour of the German naturalist Johann Friedrich Blumenbach. Due to the abundance of specimens found around Dudley, the fossil quickly became widely known as the “Dudley Bug.”
Trilobites such as Calymene were bottom-dwelling marine animals that likely fed on organic debris or small organisms within the sediment.
Geological Setting – The Much Wenlock Limestone Formation
This trilobite fossil originates from the Much Wenlock Limestone Formation, a carbonate-rich sedimentary unit deposited during the Homerian Stage of the Silurian Period. At this time, the region that is now the West Midlands was located in a warm tropical sea near the equator.
The Much Wenlock Limestone represents a thriving marine ecosystem dominated by reef-like environments and carbonate sedimentation. These shallow seas supported a rich diversity of marine life, including:
- Trilobites
- Brachiopods
- Corals and stromatoporoids
- Crinoids
- Gastropods
- Cephalopods
The limestone sediments accumulated slowly on the seabed and preserved many organisms in remarkable detail. The Wren’s Nest National Nature Reserve is particularly famous for producing large numbers of trilobites and other Silurian fossils.
Morphology and Features of Calymene Trilobites
Trilobites derive their name from their three-lobed body structure, consisting of a central axial lobe flanked by two pleural lobes. The body is also divided longitudinally into three main sections: the cephalon (head), thorax, and pygidium (tail).
Characteristic features of Calymene blumenbachii include:
- A broad semi-circular cephalon
- Prominent compound eyes positioned laterally
- Multiple articulated thoracic segments allowing flexibility
- A rounded pygidium forming the tail section
- Distinct axial segmentation along the central body
One notable trait of Calymene trilobites is their ability to enrol, curling their bodies into a protective ball similar to modern pill bugs. This defensive behaviour helped protect the softer underside from predators.
The fossil exoskeleton is composed of calcite, which often preserves exceptionally well in limestone formations, allowing fine anatomical features to remain visible millions of years later.
A Genuine British Trilobite Fossil with Certificate of Authenticity
This fossil represents an authentic specimen of one of Britain’s most famous trilobites, discovered in a locality that played a major role in the early development of palaeontology.
Key features of this specimen include:
- Genuine Calymene blumenbachii trilobite fossil
- Commonly known as the Dudley Bug
- Geological formation: Much Wenlock Limestone Formation
- Age: Silurian Period, Homerian Stage
- Locality: Wren’s Nest, Dudley, West Midlands, United Kingdom
- Classic trilobite body structure preserved in limestone
- The exact fossil shown in the photographs
- Includes a Certificate of Authenticity with lifetime guarantee
The Dudley Bug has long been one of the most celebrated fossils in British geology, with specimens collected since the early days of industrial mining in the region. This trilobite preserves the form of a marine arthropod that lived in warm tropical seas more than 430 million years ago, offering a remarkable connection to one of the most important fossil localities in the United Kingdom.
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