Rare 4.5″ Choffatia cobra Fossil Ammonite, Jurassic, Bathonian, Wilts UK, Genuine Specimen with COA

Description

Offered here is a Rare 4.5″ Fossil Ammonite of Choffatia cobra from the Bathonian Stage of the Jurassic Period, discovered in Wiltshire, United Kingdom. This species is a less commonly found member of the Middle Jurassic ammonite assemblages in the UK and is highly sought after by collectors and researchers due to its distinctive features and relative scarcity.

The fossil shown in the photographs is the actual specimen you will receive, professionally cleaned and selected for its quality and taxonomic significance.

Scale Rule Squares / Cube = 1cm — please see the photographs for full sizing and visual details.

Key Geological and Scientific Information:

• Species: Choffatia cobra
• Fossil Type: Ammonite (extinct marine cephalopod)
• Geological Period: Jurassic
• Geological Stage: Bathonian (~168–166 million years ago)
• Location: Wiltshire (Wilts), England, UK
• Formation: Likely Forest Marble or Taynton Limestone formations
• Order: Ammonitida
• Superfamily: Perisphinctoidea
• Family: Perisphinctidae
• Described By: Arkell, mid-20th century

Morphology Features:

Choffatia cobra is notable for its moderately involute coiling, with prominent, well-developed radial ribbing that bifurcates along the flanks. Its whorls are broad and rounded, and the venter is typically arched with no keel. The ribbing gives this ammonite a bold appearance, and its medium size and strong ornamentation make it a standout specimen from the Bathonian.

This particular fossil displays these features beautifully — it is a fine representative of the species.

Depositional Environment:

This specimen likely originated from shallow marine shelf environments common in southern England during the Middle Jurassic. These conditions favoured the development of limestone and marl deposits that allowed for the excellent preservation of ammonite shells like Choffatia cobra.

Stratigraphy & Biozone Relevance:

Choffatia cobra is found within the Bathonian Stage, commonly associated with the Morrisi Zone or equivalent ammonite biozones. It plays a useful supporting role in biostratigraphic correlation across British and European Bathonian sequences.

Scientific Importance:

This species provides insight into the evolution of the Perisphinctidae family and is valuable for understanding the diversity and dispersal of Middle Jurassic ammonites. Its relatively uncommon appearance in UK faunas adds to its desirability among collectors and researchers alike.

Authenticity Guarantee:

All of our fossils are 100% genuine specimens, professionally prepared and responsibly sourced. Every specimen comes with a Certificate of Authenticity, verifying its species, geological age, and locality.

This Choffatia cobra fossil ammonite is a rare and scientifically meaningful addition to any fossil collection — perfect for collectors of Jurassic ammonites, educational use, or museum-quality display.