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 10" Coroniceras rotiforme Fossil Ammonite – Bucklandi Zone, Lower Sinemurian, Jurassic – Somerset UK – Alice Purnell Collection
VERY RARE 10" Coroniceras rotiforme Fossil Ammonite – Bucklandi Zone, Lower Sinemurian, Jurassic – Somerset UK – Alice Purnell Collection - Image 2

VERY RARE 10″ Coroniceras rotiforme Fossil Ammonite – Bucklandi Zone, Lower Sinemurian, Jurassic – Somerset UK – Alice Purnell Collection

£1,440.00

Offered here is a very rare and impressively large 10-inch specimen of Coroniceras rotiforme, a giant fossil ammonite from the Bucklandi Zone of the Lower Sinemurian Stage, Early Jurassic. Found in the historic fossil region of Radstock, Somerset, United Kingdom, this ammonite is a spectacular example of the genus Coroniceras and is part of the esteemed Alice Purnell Collection. The specimen in the photo is the exact fossil you will receive.

Geological Context:

  • Species: Coroniceras rotiforme
  • Geological Period: Jurassic
  • Stage: Lower Sinemurian (~199 to 196 million years ago)
  • Zone: Bucklandi Zone
  • Location: Radstock, Somerset, UK
  • Depositional Environment: Shallow marine shelf rich in carbonate muds, formed in a transgressive sea during the Early Jurassic recovery interval after the end-Triassic extinction

Taxonomic Classification:

  • Family: Arietitidae
  • Superfamily: Psiloceratoidea
  • Order: Ammonitida
  • Suborder: Ammonitina
  • Formally Described By: Typically attributed to S.S. Buckman, early 20th century

Morphological Features:

Coroniceras rotiforme is known for its large, discoidal shell and fine, closely spaced ribbing. The shell is moderately evolute, with a wide umbilicus and a compressed whorl section. The ribs are typically sharp, often bifurcating mid-flank, giving the shell a highly textured appearance. This species reaches considerable size, making it one of the more imposing ammonites of the Lower Sinemurian.

Stratigraphic and Scientific Significance:

This species is a key component of the Bucklandi Zone, one of the earliest biostratigraphic zones of the Jurassic. It provides important data for correlating marine beds across Europe and for understanding ammonite radiation following the end-Triassic extinction. Specimens of this size and quality are rarely available, especially from well-documented collections.

Additional Details:

  • All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.
  • Scale Rule Squares / Cube = 1cm: Full specimen sizing is clearly shown in the photo.
  • From the scientifically respected Alice Purnell Collection.

This is a premium-quality fossil ammonite ideal for serious collectors, educational institutions, or those seeking an extraordinary centrepiece for display. It reflects the grandeur and diversity of Early Jurassic marine life.

Secure this museum-grade ammonite fossil today – a true geological treasure.

(Actual as seen)

Only 1 left in stock

SKU: AF1246 Categories: ,

Description

Offered here is a very rare and impressively large 10-inch specimen of Coroniceras rotiforme, a giant fossil ammonite from the Bucklandi Zone of the Lower Sinemurian Stage, Early Jurassic. Found in the historic fossil region of Radstock, Somerset, United Kingdom, this ammonite is a spectacular example of the genus Coroniceras and is part of the esteemed Alice Purnell Collection. The specimen in the photo is the exact fossil you will receive.

Geological Context:

  • Species: Coroniceras rotiforme
  • Geological Period: Jurassic
  • Stage: Lower Sinemurian (~199 to 196 million years ago)
  • Zone: Bucklandi Zone
  • Location: Radstock, Somerset, UK
  • Depositional Environment: Shallow marine shelf rich in carbonate muds, formed in a transgressive sea during the Early Jurassic recovery interval after the end-Triassic extinction

Taxonomic Classification:

  • Family: Arietitidae
  • Superfamily: Psiloceratoidea
  • Order: Ammonitida
  • Suborder: Ammonitina
  • Formally Described By: Typically attributed to S.S. Buckman, early 20th century

Morphological Features:

Coroniceras rotiforme is known for its large, discoidal shell and fine, closely spaced ribbing. The shell is moderately evolute, with a wide umbilicus and a compressed whorl section. The ribs are typically sharp, often bifurcating mid-flank, giving the shell a highly textured appearance. This species reaches considerable size, making it one of the more imposing ammonites of the Lower Sinemurian.

Stratigraphic and Scientific Significance:

This species is a key component of the Bucklandi Zone, one of the earliest biostratigraphic zones of the Jurassic. It provides important data for correlating marine beds across Europe and for understanding ammonite radiation following the end-Triassic extinction. Specimens of this size and quality are rarely available, especially from well-documented collections.

Additional Details:

  • All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.
  • Scale Rule Squares / Cube = 1cm: Full specimen sizing is clearly shown in the photo.
  • From the scientifically respected Alice Purnell Collection.

This is a premium-quality fossil ammonite ideal for serious collectors, educational institutions, or those seeking an extraordinary centrepiece for display. It reflects the grandeur and diversity of Early Jurassic marine life.

Secure this museum-grade ammonite fossil today – a true geological treasure.

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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