Description
An exceptional double ammonite fossil of the species Dorsetensia subteca, originating from the Oxfordian Stage of the Late Jurassic Period, approximately 163 to 157 million years ago. This rare and beautifully preserved fossil was discovered at the renowned Ringstead Bay, located along the dramatic coastline of Dorset, United Kingdom, a key location on the Jurassic Coast World Heritage Site.
Ammonites like Dorsetensia subteca were cephalopods—relatives of modern squid and octopuses—that thrived in ancient marine environments. They are characterised by their planispiral coiled shells and distinct ribbing patterns, often serving as biostratigraphic markers that help date the surrounding rock layers.
The preservation of two ammonites together in a single specimen enhances the rarity and display value of this piece. The rich fossiliferous Oxfordian clays and limestones of Ringstead Bay have long been known for yielding marine fossils with exceptional detail, and this piece is no exception.
This particular specimen hails from the prestigious Alice Purnell Collection, a curated selection of fossils known for their scientific and aesthetic significance. It has been expertly cleaned and prepped to showcase the natural beauty and structure of the ammonite shells.
Item Details:
- Species: Dorsetensia subteca
- Type: Fossil Ammonite (Double Specimen)
- Size: See scale photo (1cm grid squares)
- Geological Age: Late Jurassic (~163–157 million years ago)
- Stage: Oxfordian
- Formation: Likely Corallian Group (local lithostratigraphy)
- Location: Ringstead Bay, Dorset, United Kingdom
- Provenance: Alice Purnell Collection
- Certificate of Authenticity: Included
ACTUAL AS SEEN:
The image shows the exact specimen you will receive. The fossil has been carefully selected, professionally prepared, and photographed. Sizing is referenced via a 1cm square rule or cube. Colour may vary slightly depending on lighting and screen settings. Once sold, this listing will be updated with a new similar item.
100% Genuine Fossil – Professionally Prepared – Certificate of Authenticity Included – From the Esteemed Alice Purnell Collection







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