RARE Cadoceras sublaeve Ammonite Fossil | Lower Callovian Jurassic | Water Park Gloucestershire UK | Genuine Fossil with COA

Description

This listing features a RARE fossil of Cadoceras sublaeve, a beautifully preserved ammonite from the Lower Callovian Stage of the Middle Jurassic, discovered at Water Park, Gloucestershire, United Kingdom. This specimen dates to around 165–163 million years ago and represents a classic ammonite genus from the Oxford Clay and associated marine strata.

As with all our listings, this is a 100% genuine specimen, professionally cleaned and accompanied by a Certificate of Authenticity. The exact fossil shown in the photograph is the item you will receive. Cube scale = 1cm. Please refer to the photo for full dimensions.

Geological & Scientific Information:

• Fossil Type: Ammonite (extinct marine cephalopod)
• Species: Cadoceras sublaeve
• Family: Cardioceratidae
• Superfamily: Stephanoceratoidea
• Order: Ammonitida
• Geological Stage: Lower Callovian, Middle Jurassic (~165–163 million years ago)
• Location: Water Park, Gloucestershire, England, UK
• Depositional Environment: Deeper marine basin, commonly clay-rich with low oxygen conditions—ideal for fossil preservation in the British Oxford Clay Basin
• Biozone Relevance: Cadoceras species are important index fossils within the Callovian ammonite zones of northwestern Europe

Morphological Features:

• Involute shell with moderately broad whorls
• Weak to moderate ribbing, often fading near the venter
• Smooth shell surface typical of the sublaeve form, with fine growth lines
• Clear suture patterns visible in many well-preserved examples

Scientific & Collector Significance: Cadoceras sublaeve is a diagnostic species used to define specific biozones within the Lower Callovian of Britain and northern Europe. Its smooth morphology and rarity in some parts of Gloucestershire make it a valuable specimen for collectors and researchers.

Collector & Display Appeal:

• Excellent preservation with natural matrix
• Distinctive shell form perfect for display or educational purposes
• Rare British locality specimen ideal for regional or system-specific collections

Why Buy from Us?

• All fossils are 100% genuine and responsibly sourced
• Comes with a Certificate of Authenticity
• Professionally cleaned, accurately identified, and carefully photographed

Add a scientifically important and visually elegant ammonite to your fossil collection with this Cadoceras sublaeve from the Jurassic seas of Gloucestershire, UK.