Description
RARE 11″ HYPERLIOCERAS FOSSIL AMMONITE – Burton Bradstock, Dorset, Jurassic Coast, UK
Species: Hyperlioceras sp.
Geological Formation: Inferior Oolite Group
Geological Stage: Lower Bajocian, Middle Jurassic
Locality: Burton Bradstock, Dorset, United Kingdom
Discovery Date: 30 April 2025
Discovered by: Alister and Alison
Prepared by: Alison
Authenticity: Supplied with Certificate of Authenticity
Scale: Scale cube in photo = 1cm. Full dimensions shown in accompanying photo.
Collection: Alice Purnell Collection
GEOLOGICAL CONTEXT & TAXONOMY:
- Order: Ammonitida
- Superfamily: Hildoceratoidea
- Family: Hammatoceratidae
- Genus: Hyperlioceras
- Stage: Lower Bajocian (Middle Jurassic)
- Formation: Inferior Oolite Group
- Biozone: Most likely Hyperlioceras discites Zone (typical for this genus), but specific subzone unconfirmed
- Depositional Environment: Shallow marine oolitic shelf formed in a warm epicontinental sea. The Inferior Oolite represents bioclastic limestone and ooid-rich sediments laid down in a carbonate platform environment with periodic fluctuations in energy levels and sediment influx.
- Morphology Features: Ammonites of the genus Hyperlioceras are characterised by moderately involute shells with prominent, well-defined ribbing and a keeled venter. They often display a compressed whorl section and are particularly sought-after for their aesthetic appeal and well-preserved ornamentation.
- Notable Aspects: This genus plays an important role in Bajocian biostratigraphy and is valuable for correlation of Middle Jurassic marine strata across Europe.
- Formal Description: The genus Hyperlioceras was established by Buckman (1892), noted for its importance in the Lower Bajocian ammonite fauna of southern England.
ABOUT THIS SPECIMEN:
This is a beautifully preserved large fossil ammonite of the genus Hyperlioceras, measuring approximately 11 inches across. It was discovered by our dedicated team members Alister and Alison on 30 April 2025 in the world-famous Burton Bradstock area along the Jurassic Coast – a UNESCO World Heritage Site.
The specimen has been professionally cleaned, prepped, and treated by Alison, and is presented exactly as shown in the photo. It is a museum-quality ammonite fossil from the Inferior Oolite Group, highly prized for its size, preservation, and stratigraphic importance.
WHAT YOU RECEIVE:
- Large Hyperlioceras fossil ammonite (~11″)
- Jurassic Coast provenance: Burton Bradstock, Dorset, UK
- Geological formation: Inferior Oolite (Lower Bajocian)
- Professionally prepared and treated
- Certificate of Authenticity included
- Part of the prestigious Alice Purnell Collection
SUMMARY:
This rare and strikingly large Hyperlioceras fossil ammonite is a top-tier addition for any fossil collector, educator, or enthusiast of Jurassic paleontology. With strong ribbing, authentic provenance, and expert preparation, it offers both scientific and display value. This is the actual specimen you will receive – not a stock photo – and it comes fully certified.
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