Description
This listing features an authentic Jurassic ammonite fossil, most commonly from the species Hildoceras sp., discovered in the fossil-rich region of Somerset, United Kingdom. These remarkable fossils date back to the Jurassic Period, approximately 201 to 145 million years ago, when this area was submerged beneath a shallow tropical sea.
Ammonites are among the most recognisable and sought-after fossils due to their iconic spiral shell shape, which resembles a coiled ram’s horn. While they look similar to snail shells, they were actually marine cephalopods related more closely to modern-day squid, octopus, and cuttlefish than to gastropods. Ammonites moved by jet propulsion, squirting water through a siphon to propel themselves through the ancient oceans.
Ammonite fossils vary in size from tiny millimetre-wide specimens to giants reaching up to 2 metres in diameter. These fossils provide valuable insights into the marine ecosystems of the Mesozoic Era and make stunning additions to any fossil collection.
Somerset ammonites, including Hildoceras, are often found in grey limestone or shale layers and are treasured by collectors, educators, and fossil enthusiasts alike. The area around Lyme Regis and the Jurassic Coast is especially popular for fossil hunting, attracting people of all ages who hope to find ammonites embedded in the rock.
Item Details:
- Name: Hildoceras sp. (predominantly)
- Specimen: Ammonite
- Age: Jurassic Period
- Location: Somerset, UK
- Scale Reference: Scale cube = 1cm. Please refer to photo for full sizing.
- Certificate of Authenticity: Included
ACTUAL AS SEEN: You will receive the exact specimen shown in the photo. Each fossil is hand-selected and professionally photographed.
Please Note:
- Some fossils may be gently propped for photography.
- Colouration may vary depending on lighting and device screen.
- Measurements are as accurate as possible, though minor variations may occur due to natural irregularities.
- Once sold, we update the listing with a new specimen and photo.
- We recommend saving or screenshotting your purchased item’s photo for reference.
100% Genuine Fossil – Professionally Selected – Certificate of Authenticity Included






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