Description
This listing features a rare and genuine fossil specimen of Acanthoceras rhotomagense, an extinct ammonite species from the Lower Cenomanian Stage of the Cretaceous period, discovered at Snowdon Hill, Chard, Somerset, United Kingdom. Estimated to be around 100.5 to 93.9 million years old, this fossil offers a glimpse into the dynamic marine environments of the early Late Cretaceous.
Acanthoceras rhotomagense is notable for its robust, strongly ribbed shell with pronounced tubercles along the whorls. These tubercles and ribs provided hydrodynamic advantages and are key identifiers of this genus. The specimen also reflects the evolutionary diversification of ammonites during the early part of the Cenomanian.
Geological & Scientific Details:
- Species: Acanthoceras rhotomagense
- Phylum: Mollusca
- Class: Cephalopoda
- Subclass: Ammonoidea
- Order: Ammonitida
- Superfamily: Acanthoceratoidea
- Family: Acanthoceratidae
- Geological Stage: Lower Cenomanian (Early Late Cretaceous)
- Age: ~100.5–93.9 million years ago
- Formation/Location: Snowdon Hill, Chard, Somerset, UK
- Depositional Environment: Shallow epicontinental marine shelf
- Biozone: Typically found within the Mantelliceras mantelli Biozone
- Morphology Features: Strong ribbing, ventrolateral tubercles, evolute coiling, wide umbilicus
Why This Specimen Stands Out:
- Sourced from a historically important fossil site in Somerset
- Displays excellent detail and preservation of surface ornamentation
- A desirable addition to any ammonite or Cretaceous fossil collection
- Includes Certificate of Authenticity
Scale Reference: Scale Rule Squares / Cube = 1cm – Please refer to the photo for full sizing. The image shows the exact specimen you will receive.
Shipping & Packaging:
- Secure packaging with tracking
- Worldwide shipping available
A rare and scientifically significant ammonite fossil showcasing the diversity of the Lower Cenomanian seas of southern England.
All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.
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