Becheiceras Fossil Ammonite | Green Ammonite Beds | Lower Lias Jurassic Dorset UK | Genuine Fossil w/ Certificate

Description

This listing is for a Becheiceras Fossil Ammonite discovered in the iconic Green Ammonite Beds of the Lower Lias Formation, part of the world-renowned Jurassic Coast at Golden Cap, Seatown, Dorset, UK. This fossil is a fine representative of a genus associated with the Early Jurassic period and is especially noted for its preservation quality from this formation.

This specific specimen was discovered by our in-house fossil hunting team, Alister and Alison, on the 03 May 2025. It has since been expertly cleaned, prepped, and treated by Alison to highlight its morphological features. The photo you see is of the actual specimen you will receive, and it includes a 1cm scale cube to help you judge the size.

All of our fossils are carefully selected for their scientific and aesthetic qualities and come with a Certificate of Authenticity.

Fossil Details:

• Genus: Becheiceras
• Type: Fossil Ammonite (extinct cephalopod)
• Geological Formation: Green Ammonite Beds, Lower Lias
• Geological Stage: Sinemurian (Lower Jurassic, approx. 199–190 million years ago)
• Location: Golden Cap, Seatown, Dorset, England, UK
• Discovered by: Alister and Alison (03 May 2025)
• Prepared by: Alison

Geological Context:

• Biozone: Typically associated with the Oxynotum to Obtusum ammonite zones within the Sinemurian
• Depositional Environment: Offshore marine conditions, predominantly fine-grained limestone and shale indicating relatively calm, anoxic bottom waters — ideal for exceptional fossil preservation.
• Lithology: Dark-grey shales and mudstones interbedded with limestone nodules, often heavily pyritised

Morphological Features:

• Shell Shape: Planispiral, involute shell with distinctive ribbing and ornamentation
• Ribbing: Fine, dense, regular ribs that curve forward, characteristic of Becheiceras
• Surface Preservation: Often partial to full preservation of shell ornamentation; pyritisation may occur depending on conditions
• Diagnostic Features: Strong ventral keel and rounded whorl section help differentiate this genus from other Sinemurian ammonites

Scientific Significance:

Becheiceras is a genus of ammonite from the Lower Jurassic. It holds biostratigraphic value in correlating marine sedimentary rocks and is a useful index fossil in Sinemurian-aged sequences. Ammonites like this played an important role in Jurassic marine ecosystems as nektonic predators.

This specimen, from a famous fossil-rich site like Golden Cap, adds notable value for collectors and researchers alike due to its excellent preservation and provenance.

Classification:

• Kingdom: Animalia
• Phylum: Mollusca
• Class: Cephalopoda
• Order: Ammonitida
• Superfamily: Eoderoceratoidea
• Family: Eoderoceratidae
• Genus: Becheiceras
• Identification Authority: Generally identified through comparative morphology; specific formal ID not provided here

Summary:

• Specimen: Becheiceras Fossil Ammonite
• Age: Lower Jurassic (Sinemurian Stage)
• Location: Green Ammonite Beds, Golden Cap, Dorset, UK
• Discovery Date: 03 May 2025
• Prepared by: Alison
• Authenticity: Certificate of Authenticity included
• Scale: 1cm cube included in photo

Note:

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity. The fossil shown is the exact one you will receive. Perfect for collectors, educators, or those passionate about Earth’s prehistoric history.