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 4" Grossouvria sulcifera Fossil Ammonite | Middle Callovian Jurassic | Ashton Keynes Wiltshire UK | Genuine Specimen with COA
Rare 4" Grossouvria sulcifera Fossil Ammonite | Middle Callovian Jurassic | Ashton Keynes Wiltshire UK | Genuine Specimen with COA - Image 2

Rare 4″ Grossouvria sulcifera Fossil Ammonite | Middle Callovian Jurassic | Ashton Keynes Wiltshire UK | Genuine Specimen with COA

£36.00

This listing is for a Rare 4″ Fossil Ammonite (Grossouvria sulcifera) from the Middle Callovian Stage of the Middle Jurassic, discovered at Ashton Keynes, Wiltshire, United Kingdom.

100% Genuine Fossil Specimen – All of our fossils are authentic and come with a Certificate of Authenticity.

Exact Specimen Shown – The photos provided are of the actual fossil you will receive.

Scale for Reference – Scale rule squares/cube = 1cm. Please see photos for full sizing.

 

Geological & Scientific Details:

  • Fossil Type: Ammonite (extinct marine mollusc, related to squid and octopus).
  • Species: Grossouvria sulcifera.
  • Order: Ammonitida.
  • Superfamily: Stephanoceratoidea.
  • Family: Tulitidae.
  • Geological Period: Jurassic.
  • Stage/Age: Middle Callovian (approx. 166 – 163 million years ago).
  • Locality: Ashton Keynes, Wiltshire, UK.

 

Notable Features & Morphology:

  • Shell Form: Moderately involute with robust, thick whorls.
  • Ribs: Deep, widely spaced ribs crossing the flanks, giving the ammonite its characteristic “sulcifera” appearance.
  • Whorl Section: Strongly rounded, producing a bold and striking shell.
  • Size: A rare, large specimen at 4″, making it highly collectible.

 

Depositional Environment:

During the Callovian, the Wiltshire area was covered by shallow marine seas depositing fine sediments and oolitic limestones. These conditions preserved ammonites and associated fauna in excellent detail.

 

Scientific & Collecting Importance:

Grossouvria sulcifera is an important ammonite species for biostratigraphic correlation in the Callovian Stage. Its distinctive morphology and rarity make it both a scientifically valuable and highly desirable collector’s specimen.

 

Why Buy This Fossil?

  • A rare ammonite species from the Middle Jurassic of Wiltshire, UK.
  • Excellent preservation with bold ribbing and rounded whorl form.
  • A significant addition for collectors of ammonites, Jurassic fossils, or UK material.
  • Supplied with a Certificate of Authenticity guaranteeing its provenance.

 

All of our fossils are responsibly sourced, carefully prepared, and chosen for quality.

(Actual as seen)

Only 1 left in stock

SKU: UF4352 Category:

Description

This listing is for a Rare 4″ Fossil Ammonite (Grossouvria sulcifera) from the Middle Callovian Stage of the Middle Jurassic, discovered at Ashton Keynes, Wiltshire, United Kingdom.

100% Genuine Fossil Specimen – All of our fossils are authentic and come with a Certificate of Authenticity.

Exact Specimen Shown – The photos provided are of the actual fossil you will receive.

Scale for Reference – Scale rule squares/cube = 1cm. Please see photos for full sizing.

 

Geological & Scientific Details:

  • Fossil Type: Ammonite (extinct marine mollusc, related to squid and octopus).
  • Species: Grossouvria sulcifera.
  • Order: Ammonitida.
  • Superfamily: Stephanoceratoidea.
  • Family: Tulitidae.
  • Geological Period: Jurassic.
  • Stage/Age: Middle Callovian (approx. 166 – 163 million years ago).
  • Locality: Ashton Keynes, Wiltshire, UK.

 

Notable Features & Morphology:

  • Shell Form: Moderately involute with robust, thick whorls.
  • Ribs: Deep, widely spaced ribs crossing the flanks, giving the ammonite its characteristic “sulcifera” appearance.
  • Whorl Section: Strongly rounded, producing a bold and striking shell.
  • Size: A rare, large specimen at 4″, making it highly collectible.

 

Depositional Environment:

During the Callovian, the Wiltshire area was covered by shallow marine seas depositing fine sediments and oolitic limestones. These conditions preserved ammonites and associated fauna in excellent detail.

 

Scientific & Collecting Importance:

Grossouvria sulcifera is an important ammonite species for biostratigraphic correlation in the Callovian Stage. Its distinctive morphology and rarity make it both a scientifically valuable and highly desirable collector’s specimen.

 

Why Buy This Fossil?

  • A rare ammonite species from the Middle Jurassic of Wiltshire, UK.
  • Excellent preservation with bold ribbing and rounded whorl form.
  • A significant addition for collectors of ammonites, Jurassic fossils, or UK material.
  • Supplied with a Certificate of Authenticity guaranteeing its provenance.

 

All of our fossils are responsibly sourced, carefully prepared, and chosen for quality.

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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