Rare 6.5″ Fossil Ammonite Coroniceras reynesi | Lower Pliensbachian Jurassic Radsock UK | Genuine + COA

Description

This listing is for a rare 6.5-inch fossil ammonite, Coroniceras reynesi, from the Lower Pliensbachian Stage of the Early Jurassic, discovered in Radsock, Somerset, United Kingdom. The photo shows the actual specimen you will receive. Scale cube/squares are 1cm — please refer to the photo for full sizing.

This beautiful fossil is an outstanding example of British Lower Jurassic ammonites and makes a superb addition to any collection.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

Geological & Scientific Information:

• Fossil Type: Ammonite
• Species: Coroniceras reynesi
• Order: Ammonitida
• Superfamily: Eoderoceratoidea
• Family: Eoderoceratidae
• Geological Stage: Lower Pliensbachian (~190.8 – 183.0 million years ago)
• Zone: Possibly within the Jamesoni or Ibex ammonite zones, depending on exact horizon
• Period: Jurassic
• Formation: Lower Lias Group
• Locality: Radsock, Somerset, United Kingdom
• Depositional Environment: Shallow epicontinental sea, characterised by alternating limestones and mudstones, deposited in low-energy marine conditions

Morphology & Notable Features:

• Large, discoidal and moderately involute shell with a narrow umbilicus
• Strong ribbing that bifurcates or trifurcates at the flank, crossing onto the venter
• Whorl section typically compressed, with rounded ventral area
• Beautiful symmetry and clear ornamentation, ideal for display and scientific reference
• Excellent preservation allows visibility of suture lines and detailed ornament

Scientific Significance:

Coroniceras reynesi is a key ammonite from the Lower Pliensbachian and contributes to the understanding of early Jurassic faunal evolution in northwest Europe. It is part of the eoderoceratid lineage, known for rapid diversification during the Pliensbachian.

It plays an important role in biostratigraphy and is frequently cited in ammonite monographs and zonation charts for the Early Jurassic of southern Britain.

Ideal For:

• Advanced collectors of British ammonites
• Stratigraphic or paleontological study collections
• Educational use or museum-quality displays
• Anyone seeking a large, striking and scientifically valuable ammonite specimen

What You Will Receive:

• The exact Coroniceras reynesi fossil pictured (6.5″)
• Certificate of Authenticity
• Secure packaging to ensure safe delivery