Description
Offered here is a RARE 4.5″ Fossil Ammonite of Catasigaloceras enodatum from the Lower Callovian Stage of the Jurassic Period, collected from the renowned fossil locality of Waterpark, Ashton Keynes, United Kingdom. This highly sought-after ammonite is both a scientifically important specimen and a beautifully preserved collector’s piece.
You will receive the exact specimen shown in the photographs, selected for its clarity, completeness, and quality.
Scale Rule Squares / Cube = 1cm — please view the photos for full sizing and close-up details.
Key Geological and Scientific Information:
- Species: Catasigaloceras enodatum
- Fossil Type: Ammonite (extinct marine cephalopod)
- Geological Period: Jurassic
- Geological Stage: Lower Callovian (Middle Jurassic)
- Location: Waterpark, Ashton Keynes, Wiltshire, England, UK
- Formation: Likely from the Kellaways Beds
- Approximate Age: ~164 million years ago
- Order: Ammonitida
- Superfamily: Stephanoceratoidea
- Family: Sigaloceratidae
- Described By: Buckman, early 20th century (precise date varies by reference)
Morphology Features: Catasigaloceras enodatum is characterised by a relatively involute shell with a smooth appearance or fine ribbing depending on growth stage and preservation. The shell typically features a compressed whorl section with gently rounded sides and a narrowly arched venter. It is a refined example of Callovian ammonite evolution, known for less ornate shell sculpture compared to earlier or contemporaneous genera.
Depositional Environment: This ammonite was preserved in low-energy marine shelf sediments, associated with the Kellaways Beds — part of a wider Jurassic marine transgression that laid down fine-grained mudstones and silty clays, ideal for fossil preservation.
Biozone & Stratigraphic Significance: Catasigaloceras enodatum is typically found within the Calloviense Zone, contributing to the detailed subdivision of the Lower Callovian ammonite stratigraphy. Its presence is useful for refining biostratigraphic correlations across southern England and beyond.
Scientific Importance: This species reflects a transitional morphology within the Sigaloceratidae, highlighting evolutionary trends in shell simplification during the Middle Jurassic. Its clean structure makes it both a collector’s piece and a valuable biostratigraphic marker.
Authenticity Guarantee: All our fossils are 100% genuine specimens, sourced with scientific care and prepared to a professional standard. Every fossil comes with a Certificate of Authenticity, verifying its identity and origin.
Add this elegant and scientifically notable Catasigaloceras enodatum to your fossil collection today — a true representation of the UK’s exceptional Jurassic heritage.
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