Acanthoceras jukesbrowni Fossil Ammonite Lower Cenomanian Cretaceous Dorset UK Genuine Specimen

Description

This listing presents a beautifully preserved Acanthoceras jukesbrowni fossil ammonite, from the Lower Cenomanian stage of the Cretaceous period, found in Dorset, United Kingdom. A textbook example of mid-Cretaceous ammonite morphology, this specimen features ornate ribbing and pronounced tubercles, hallmarks of the genus.

• Fossil Type: Ammonite (extinct marine cephalopod)
• Species: Acanthoceras jukesbrowni
• Size: See photo with 1cm scale cube for precise sizing
• Geological Period: Cretaceous
• Stage: Lower Cenomanian (~100.5 to 98 million years ago)
• Locality: Dorset, England, UK
• Family: Acanthoceratidae
• Superfamily: Acanthoceratoidea
• Order: Ammonitida
• Depositional Environment: Warm epicontinental sea; chalk and marl deposits with rich pelagic and nektonic faunal assemblages

Geological & Scientific Significance:

The Cenomanian stage marks the beginning of the Late Cretaceous and is characterised by elevated sea levels and widespread carbonate sedimentation. Acanthoceras jukesbrowni is a key zonal species frequently used in European and global biostratigraphy. Its elaborate ornamentation—marked by strong radial ribs and tubercles—makes it both scientifically important and visually striking.

Ammonites like Acanthoceras were nektonic carnivores, actively swimming in the open seas. Their widespread distribution and rapid evolutionary changes allow them to serve as excellent index fossils.

Fossils from Dorset’s Cenomanian beds are typically found in chalk and marl sequences and are prized for their preservation quality. Acanthoceratids from this region are often used in correlation with other European localities.

Notable Features:

• Bold radial ribbing and prominent tubercles
• Moderate to large shell with slightly involute coiling
• Excellent preservation from a classic Cretaceous site in southern England
• Important species for biozonation of Lower Cenomanian marine strata

Authenticity Guaranteed: All of our fossils are 100% genuine and come with a Certificate of Authenticity, confirming the specimen’s identity and provenance.

Photo Disclosure: The fossil you see in the photo is the exact item you will receive. The cube scale shown includes 1cm squares for accurate size reference.

This Acanthoceras jukesbrowni fossil ammonite is a must-have for collectors of Cretaceous fossils, educators, or anyone fascinated by the rich marine heritage of the UK’s geologic past.