Description
Offered for sale is a well-preserved specimen of Arnioceras semicostatum, a classic Lower Jurassic ammonite fossil from Yorkshire, United Kingdom. This species comes from the Lower Sinemurian stage of the Jurassic period, dating to approximately 199 to 196 million years ago.
The ammonite displays the typical evolute coiling and semi-costate ribbing for which Arnioceras is well known. These features make it an excellent example of an extinct marine cephalopod that once thrived in the warm shallow seas that covered much of present-day Britain during the Early Jurassic.
This fossil is part of the Alice Purnell Collection, known for its high-quality and scientifically curated specimens. The photo shows the exact fossil you will receive, selected for its preservation and natural detail.
Geological and Species Details:
- Species: Arnioceras semicostatum
- Type: Ammonite (extinct marine cephalopod)
- Geological Age: Lower Jurassic, Sinemurian Stage
- Formation: Lower Lias
- Locality: Yorkshire, United Kingdom
Key Features:
- 100% genuine fossil – includes a Certificate of Authenticity
- Collected from a classic Lower Jurassic site in Yorkshire
- From the Alice Purnell Collection
- A scientifically significant and visually attractive display specimen
- Scale cube/squares = 1cm – full sizing available in the photo
Arnioceras semicostatum is a biostratigraphically important ammonite species and a beautiful example of Jurassic marine life. Specimens like this are excellent additions to any fossil collection, educational display, or natural history exhibit.
Don’t miss the chance to own an authentic piece of Britain’s ancient seas—secure this Arnioceras semicostatum ammonite fossil today.
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