Description
This listing features a rare, large 8-inch fossil ammonite, Apoderoceras ferox, from the Lower Pliensbachian Stage of the Early Jurassic, discovered at St Peter’s Field, Radstock, Somerset, United Kingdom. The image shows the actual fossil you will receive. Each square or cube in the scale = 1cm — please refer to the photos for exact dimensions.
This is a premium-quality and scientifically significant fossil — ideal for collectors, display, or educational purposes.
All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.
Geological & Scientific Information:
- Fossil Type: Ammonite
- Species: Apoderoceras ferox
- Order: Ammonitida
- Superfamily: Eoderoceratoidea
- Family: Eoderoceratidae
- Geological Stage: Lower Pliensbachian (approx. 190.8 – 189.6 million years ago)
- Biozone: Jamesoni Zone, Apoderoceras ferox Subzone — key marker within Lower Jurassic sequences
- Formation: Lower Lias (specifically within the Jamesoni Subzone of the Charmouth Mudstone Formation)
- Locality: St Peter’s Field, Radstock, Somerset, UK
- Depositional Environment: Offshore marine shelf with clay-rich, low-energy sedimentation — ideal for fossil preservation
Morphology & Notable Features:
- Strongly evolute and thick-shelled ammonite with wide umbilicus
- Coarse, widely spaced primary ribs with tuberculate terminations near the venter
- Deeply incised ribs giving it a rugged appearance — hence the name ferox
- Venter is broad and rounded, with distinctive radial ornamentation
- Excellent preservation enables study of classic Lower Jurassic ammonite suture patterns
Scientific Significance:
Apoderoceras ferox is a highly recognisable and biostratigraphically important species, marking the base of the Jamesoni Zone in the Lower Pliensbachian. Its widespread occurrence across Europe allows geologists and palaeontologists to correlate marine sediments and reconstruct palaeoenvironments from nearly 190 million years ago.
Originally described by d’Orbigny in the 19th century, Apoderoceras has since become a focal point for studies on early ammonite evolution in the aftermath of the Triassic-Jurassic extinction.
Ideal For:
- Advanced fossil and ammonite collectors
- Stratigraphic and palaeontological reference collections
- Natural history displays or educational exhibitions
- Geological enthusiasts with an interest in British Jurassic faunas
What You Will Receive:
- The exact 8″ specimen of Apoderoceras ferox shown in the listing photos
- Certificate of Authenticity
- Expert protective packaging for safe and secure delivery
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