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 Sigaloceras Fossil Ammonite – Lower Callovian, Jurassic – Ashton Keynes, UK – Certified Authentic – Alice Purnell Collection

£18.00

A scientifically significant Sigaloceras fossil ammonite from the Lower Callovian Stage of the Middle Jurassic, discovered in Ashton Keynes, United Kingdom. This authentic and visually striking specimen originates from the renowned Alice Purnell Collection. The listing features a photograph of the actual piece you will receive, ensuring full buyer confidence.

Geological & Scientific Details:

  • Fossil Type: Ammonite (Extinct Marine Cephalopod)
  • Genus: Sigaloceras
  • Age: Lower Callovian Stage, Middle Jurassic (~166–164 million years ago)
  • Location: Ashton Keynes, Gloucestershire, UK
  • Morphology Features: Moderately involute shell with finely ribbed whorls; keeled venter; suture lines complex and diagnostic; known for precise zonal usage
  • Family: Oppeliidae
  • Superfamily: Haploceratoidea
  • Order: Ammonitida
  • Zone: Most likely within the Macrocephalites Zone of the Lower Callovian, though exact stratigraphy may vary by exposure
  • Depositional Environment: Shallow marine shelf settings, with calcareous sediment accumulation promoting fossil preservation
  • Notable: Sigaloceras is an important zonal ammonite used for dating and correlating Callovian marine strata. Specimens of this genus are uncommon and valuable to both collectors and researchers.

This piece provides an outstanding opportunity to own a genuine fossil from a key Jurassic stage, suitable for display, education, or scholarly research.

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

Please Note:

  • Scale Rule Squares / Cube = 1cm – Please refer to the photograph for full sizing
  • The photo shows the exact fossil you will receive
  • Part of the well-curated and historically valuable Alice Purnell Collection

 

(Actual as seen)

Out of stock

SKU: AF1292 Category:

Description

A scientifically significant Sigaloceras fossil ammonite from the Lower Callovian Stage of the Middle Jurassic, discovered in Ashton Keynes, United Kingdom. This authentic and visually striking specimen originates from the renowned Alice Purnell Collection. The listing features a photograph of the actual piece you will receive, ensuring full buyer confidence.

Geological & Scientific Details:

  • Fossil Type: Ammonite (Extinct Marine Cephalopod)
  • Genus: Sigaloceras
  • Age: Lower Callovian Stage, Middle Jurassic (~166–164 million years ago)
  • Location: Ashton Keynes, Gloucestershire, UK
  • Morphology Features: Moderately involute shell with finely ribbed whorls; keeled venter; suture lines complex and diagnostic; known for precise zonal usage
  • Family: Oppeliidae
  • Superfamily: Haploceratoidea
  • Order: Ammonitida
  • Zone: Most likely within the Macrocephalites Zone of the Lower Callovian, though exact stratigraphy may vary by exposure
  • Depositional Environment: Shallow marine shelf settings, with calcareous sediment accumulation promoting fossil preservation
  • Notable: Sigaloceras is an important zonal ammonite used for dating and correlating Callovian marine strata. Specimens of this genus are uncommon and valuable to both collectors and researchers.

This piece provides an outstanding opportunity to own a genuine fossil from a key Jurassic stage, suitable for display, education, or scholarly research.

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

Please Note:

  • Scale Rule Squares / Cube = 1cm – Please refer to the photograph for full sizing
  • The photo shows the exact fossil you will receive
  • Part of the well-curated and historically valuable Alice Purnell Collection

 

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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