Fossils for Sale - High-quality BRITISH and WORLDWIDE Fossils. An impressive selection of fossils, including Ammonites, Trilobites, Belemnites, Fossil Fish, Fossil Shark Teeth, Fossilised Insects in Amber, Dinosaurs, and Reptiles. UK Fossils was formed in 1988 and collects and preps our own fossils in the heart of the Jurassic Coast, collecting fossils from Lyme Regis, Charmouth and Somerset. Our passion for fossils is reflected in our carefully curated collection, which includes some of the rarest and most unique specimens available.

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VERY RARE 8″ Coroniceras rotiforme Fossil Ammonite | Bucklandi Zone, Lower Sinemurian Jurassic | Stowey Radstock Somerset UK

£480.00

A truly impressive and very rare 8-inch fossil ammonite: Coroniceras rotiforme from the Bucklandi Zone of the Lower Sinemurian Stage, Early Jurassic, found at Stowey near Radstock, Somerset, United Kingdom. This large and beautifully preserved specimen is a stunning example of one of the earliest and most iconic Jurassic ammonites, notable for its scientific importance and visual impact.

This listing features the exact specimen shown in the photographs, and includes a 1cm scale cube for accurate size reference. Please review all images for full sizing and preservation details.

 

Geological & Palaeontological Information:

  • Fossil Type: Ammonite
  • Species: Coroniceras rotiforme (first described by S.S. Buckman)
  • Geological Period: Jurassic
  • Stage: Lower Sinemurian (~199 to 196 million years ago)
  • Zone: Bucklandi Zone (the earliest ammonite biozone of the Sinemurian)
  • Location: Stowey, near Radstock, Somerset, UK
  • Depositional Environment: Marine shelf; deposited in low-energy, fine-grained sediments within the Lower Lias Formation
  • Order: Ammonitida
  • Superfamily: Psiloceratoidea
  • Family: Arietitidae

 

Morphological Features:

  • Thick, robust, and strongly involute shell with deeply embracing whorls
  • Prominent, straight ribs running from umbilicus to venter
  • Deep umbilicus and high whorl expansion
  • Rounded venter with potential for slight keel depending on preservation
  • Characteristic of early Jurassic ammonite evolution and highly diagnostic for the zone

 

Notable Points:

  • Coroniceras rotiforme is a key ammonite species for identifying the Bucklandi Zone, the first ammonite zone of the Sinemurian Stage
  • This large, display-worthy specimen is extremely rare in both size and condition
  • Fossils from the Stowey area are increasingly difficult to source due to limited accessibility

 

Why This Fossil is Exceptional:

  • Very rare large ammonite with academic and display value
  • From a globally important Lower Jurassic site
  • Supplied with a Certificate of Authenticity for guaranteed provenance
  • 100% genuine and ethically sourced fossil
  • Ideal for collectors, museums, and educational display

 

(Actual as seen)

Includes a fully hand-signed Premium Certificate of Authenticity.

Only 1 left in stock

SKU: UF4494 Category:

Description

A truly impressive and very rare 8-inch fossil ammonite: Coroniceras rotiforme from the Bucklandi Zone of the Lower Sinemurian Stage, Early Jurassic, found at Stowey near Radstock, Somerset, United Kingdom. This large and beautifully preserved specimen is a stunning example of one of the earliest and most iconic Jurassic ammonites, notable for its scientific importance and visual impact.

This listing features the exact specimen shown in the photographs, and includes a 1cm scale cube for accurate size reference. Please review all images for full sizing and preservation details.

 

Geological & Palaeontological Information:

  • Fossil Type: Ammonite
  • Species: Coroniceras rotiforme (first described by S.S. Buckman)
  • Geological Period: Jurassic
  • Stage: Lower Sinemurian (~199 to 196 million years ago)
  • Zone: Bucklandi Zone (the earliest ammonite biozone of the Sinemurian)
  • Location: Stowey, near Radstock, Somerset, UK
  • Depositional Environment: Marine shelf; deposited in low-energy, fine-grained sediments within the Lower Lias Formation
  • Order: Ammonitida
  • Superfamily: Psiloceratoidea
  • Family: Arietitidae

 

Morphological Features:

  • Thick, robust, and strongly involute shell with deeply embracing whorls
  • Prominent, straight ribs running from umbilicus to venter
  • Deep umbilicus and high whorl expansion
  • Rounded venter with potential for slight keel depending on preservation
  • Characteristic of early Jurassic ammonite evolution and highly diagnostic for the zone

 

Notable Points:

  • Coroniceras rotiforme is a key ammonite species for identifying the Bucklandi Zone, the first ammonite zone of the Sinemurian Stage
  • This large, display-worthy specimen is extremely rare in both size and condition
  • Fossils from the Stowey area are increasingly difficult to source due to limited accessibility

 

Why This Fossil is Exceptional:

  • Very rare large ammonite with academic and display value
  • From a globally important Lower Jurassic site
  • Supplied with a Certificate of Authenticity for guaranteed provenance
  • 100% genuine and ethically sourced fossil
  • Ideal for collectors, museums, and educational display

 

Additional information

Era

Jurassic

Origin

United Kingdom

Jurassic Information

The Jurassic Period (201–145 million years ago) was the golden age of dinosaurs, with iconic species like Brachiosaurus, Stegosaurus, and Allosaurus dominating the land. It was a time of warm, humid climates, with high sea levels that created vast shallow seas, supporting abundant marine reptiles, ammonites, and early coral reefs. The first birds, such as Archaeopteryx, evolved from small theropod dinosaurs, while early mammals remained small and nocturnal. Lush forests of cycads, conifers, and ferns covered the land, providing food for giant herbivores. The breakup of the supercontinent Pangaea accelerated, shaping Earth's geography and setting the stage for the diverse ecosystems of the Cretaceous.

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