Description
Own a remarkable piece of British geological heritage with this genuine Dawsonoceras annulatum orthocone fossil from the Wenlockian stage of the Silurian period, discovered near Ledbury, Herefordshire, UK. This straight-shelled cephalopod fossil offers insight into marine life that thrived over 425 million years ago in the shallow seas of the ancient Welsh Borderlands.
Fossil Type: Orthocone Cephalopod
Species: Dawsonoceras annulatum
Geological Period: Silurian (~443 to 419 million years ago)
Geological Stage: Wenlockian (Wenlock Epoch, ~433 to 427 million years ago)
Location: Ledbury, Herefordshire, United Kingdom
Scale Rule: Squares/Cube = 1cm (Refer to photo for full sizing)
Specimen: The photo shows the actual specimen you will receive
Authenticity: All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity
Geological and Paleontological Information
Dawsonoceras annulatum is a genus of straight-shelled nautiloid cephalopods found in Silurian marine strata. This genus is distinguished by its distinctive annulate (ringed) ornamentation along the length of its orthoconic shell. Specimens from the Ledbury area are preserved in marine sedimentary rocks deposited in a warm, shallow sea during the Wenlock Epoch.
- Phylum: Mollusca
- Class: Cephalopoda
- Order: Orthocerida
- Family: Dawsonoceratidae
- Superfamily: Orthocerataceae
- Depositional Environment: Shallow marine platform with low-energy carbonate and calcareous mudstone deposition
- Morphological Features: Long, straight (orthoconic) shell with regularly spaced transverse ridges (annulations); internally chambered phragmocone with a central or subcentral siphuncle used for buoyancy control
- Notable: Dawsonoceras annulatum is a well-documented nautiloid species from the Wenlockian of Britain and contributes significantly to our understanding of Silurian marine ecosystems
- Biozone: Likely falls within graptolite or brachiopod-based Wenlock biozones; specific assignment requires precise stratigraphic positioning
- Identifier: Originally described in 19th-century paleontological literature; well-represented in British Silurian collections
Why This Fossil Is Special
This orthocone fossil from Ledbury is not only aesthetically striking with its annulated shell but also holds scientific importance. It comes from the Wenlockian strata of the Welsh Borderland, a globally recognized reference area for Silurian stratigraphy.
Why Buy From Us?
- 100% genuine fossil with Certificate of Authenticity
- What you see is what you get—specimen in photo is the one you will receive
- Ethically sourced from historically significant UK geological formations
- Excellent for collectors, educators, and fossil enthusiasts
Bring home a captivating relic from Earth’s ancient oceans—this Dawsonoceras annulatum fossil from the Wenlockian Silurian seas of Ledbury, UK is a true collector’s treasure from over 425 million years ago.
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