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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RARE Macrocephalites macrocephalus Fossil Ammonite – Upper Cornbrash, Callovian, Jurassic, Shorncote Quarry UK – COA
RARE Macrocephalites macrocephalus Fossil Ammonite – Upper Cornbrash, Callovian, Jurassic, Shorncote Quarry UK – COA - Image 2

RARE Macrocephalites macrocephalus Fossil Ammonite – Upper Cornbrash, Callovian, Jurassic, Shorncote Quarry UK – COA

Original price was: £132.00.Current price is: £118.80.

Available here is a superb and rare example of Macrocephalites macrocephalus, a classic ammonite fossil from the Upper Cornbrash Formation, dated to the Callovian stage of the Middle Jurassic, approximately 165 million years ago. This outstanding piece was discovered at Shorncote Quarry, Gloucestershire, United Kingdom, a known site for finely preserved Middle Jurassic marine fossils. It is part of the renowned Alice Purnell Collection, and the specimen photographed is exactly the one you will receive.

Geological Context:

  • Species: Macrocephalites macrocephalus
  • Geological Period: Jurassic
  • Stage: Callovian (Middle Jurassic)
  • Formation: Upper Cornbrash
  • Locality: Shorncote Quarry, Gloucestershire, UK
  • Age Range: ~165 million years ago
  • Depositional Environment: Shallow marine shelf environment with intermittent siliciclastic and carbonate sedimentation during the late Middle Jurassic transgression.

Taxonomic Classification:

  • Family: Macrocephalitidae
  • Superfamily: Stephanoceratoidea
  • Order: Ammonitida

Morphological Features: Macrocephalites macrocephalus is distinguished by its large, discoidal, and strongly ribbed shell with a wide umbilicus. Its ribs are thick and pronounced, bifurcating from the umbilical edge and sweeping across the flanks. The shell generally exhibits a somewhat compressed whorl section and can attain large sizes. The preservation on this specimen is crisp and reveals much of the diagnostic detail with remarkable clarity.

Scientific and Collectable Significance: This species serves as a biostratigraphic marker within the Callovian, making it not only visually stunning but also a fossil of important scientific interest. Fossils from the Cornbrash are often used to correlate marine sequences across Europe.

Additional Information:

  • All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.
  • Scale Rule Squares / Cube = 1cm: Refer to the photo for exact dimensions.
  • From the prestigious Alice Purnell Collection.

Perfect for collectors, educators, or as an elegant showcase piece, this rare ammonite bridges beauty, science, and natural history in one fossil. Add a valuable specimen from the UK’s Jurassic heritage to your collection today!

(Actual as seen)

Only 1 left in stock

SKU: AF1250 Category:

Description

Available here is a superb and rare example of Macrocephalites macrocephalus, a classic ammonite fossil from the Upper Cornbrash Formation, dated to the Callovian stage of the Middle Jurassic, approximately 165 million years ago. This outstanding piece was discovered at Shorncote Quarry, Gloucestershire, United Kingdom, a known site for finely preserved Middle Jurassic marine fossils. It is part of the renowned Alice Purnell Collection, and the specimen photographed is exactly the one you will receive.

Geological Context:

  • Species: Macrocephalites macrocephalus
  • Geological Period: Jurassic
  • Stage: Callovian (Middle Jurassic)
  • Formation: Upper Cornbrash
  • Locality: Shorncote Quarry, Gloucestershire, UK
  • Age Range: ~165 million years ago
  • Depositional Environment: Shallow marine shelf environment with intermittent siliciclastic and carbonate sedimentation during the late Middle Jurassic transgression.

Taxonomic Classification:

  • Family: Macrocephalitidae
  • Superfamily: Stephanoceratoidea
  • Order: Ammonitida

Morphological Features: Macrocephalites macrocephalus is distinguished by its large, discoidal, and strongly ribbed shell with a wide umbilicus. Its ribs are thick and pronounced, bifurcating from the umbilical edge and sweeping across the flanks. The shell generally exhibits a somewhat compressed whorl section and can attain large sizes. The preservation on this specimen is crisp and reveals much of the diagnostic detail with remarkable clarity.

Scientific and Collectable Significance: This species serves as a biostratigraphic marker within the Callovian, making it not only visually stunning but also a fossil of important scientific interest. Fossils from the Cornbrash are often used to correlate marine sequences across Europe.

Additional Information:

  • All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.
  • Scale Rule Squares / Cube = 1cm: Refer to the photo for exact dimensions.
  • From the prestigious Alice Purnell Collection.

Perfect for collectors, educators, or as an elegant showcase piece, this rare ammonite bridges beauty, science, and natural history in one fossil. Add a valuable specimen from the UK’s Jurassic heritage to your collection today!

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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