Lobolytoceras siemansi Ammonite Fossil | Upper Toarcian, Jurassic | Eype Dorset UK | Alice Purnell Collection | Genuine with Certificate

Description

Fossil Type & Species:

This listing features a genuine fossil of the rare ammonite Lobolytoceras siemansi, a beautifully preserved example from the Upper Toarcian Stage of the Jurassic Period. Sourced from the iconic Eype locality in Dorset, United Kingdom, this specimen is also notable for having come from the Alice Purnell Collection, adding historical and collector value.

Geological Formation & Insight:

Lobolytoceras is a genus of lytoceratid ammonites known for its distinctive shell morphology—typically smooth, involute, and tightly coiled with a rounded venter and minimal ornamentation. These ammonites were part of the rich marine ecosystems flourishing in the European epicontinental seas during the Jurassic.

The fossil originates from Upper Toarcian-aged strata (~183 to 174 million years ago), part of the Jurassic Lias Group, well-exposed along the cliffs at Eype, Dorset, on England’s renowned Jurassic Coast—a UNESCO World Heritage Site.

The ammonite likely lived in shallow marine environments, swimming freely as a nektonic predator or scavenger. Fossils from this region often display excellent preservation due to fine-grained sediments, and this specimen is no exception.

Item Specifics:

• Fossil Type: Ammonite
• Species: Lobolytoceras siemansi
• Geological Age: Upper Toarcian Stage, Early Jurassic (~183–174 million years ago)
• Formation: Lias Group (marine shale/limestone)
• Locality: Eype, Dorset, United Kingdom (Jurassic Coast)
• Provenance: From the Alice Purnell Collection
• Preservation: Natural, with detailed suture lines and shell structure
• Colour: Typically grey-brown with fossil shell contrasting matrix
• Size: See scale cube in photo (each square = 1cm)
• Condition: 100% natural; no restoration or reconstruction
• Specimen: The exact fossil pictured is the one you will receive

Authenticity Guarantee:

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity. This carefully selected ammonite comes directly from the Alice Purnell Collection, guaranteeing both authenticity and provenance.

Shipping & Packaging:

Your fossil will be securely packaged with full tracking included. A superb addition for fossil collectors, educators, natural history enthusiasts, or as a scientifically meaningful gift.

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