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 Bigotites thevenini Fossil Ammonite – Upper Bajocian, Jurassic, Calvados France – Genuine + COA

£24.00

An exceptionally rare and well-preserved Bigotites thevenini Fossil Ammonite, from the Upper Bajocian Stage of the Jurassic Period, collected in Calvados, Normandy, France. This ammonite is a true collector’s piece, representing a less commonly encountered genus with distinctive ribbing and stratigraphic importance. Comes with a Certificate of Authenticity, and the exact fossil pictured is the one you will receive.

Fossil Type & Species:

  • Type: Ammonite (extinct marine cephalopod)
  • Species: Bigotites thevenini
  • Order: Ammonitida
  • Superfamily: Stephanoceratoidea
  • Family: Stephanoceratidae

Geological Context:

  • Period: Jurassic
  • Epoch/Stage: Middle Jurassic – Upper Bajocian (approx. 170.3 to 168.3 million years ago)
  • Biozone: Likely from the Parkinsonia or Garantiana zone (Bigotites often associated with finer zonal subdivisions in regional stratigraphy)
  • Depositional Environment: Marine shelf environment with alternating marl and limestone beds – rich in cephalopod fauna

Locality:

  • Region: Calvados, Normandy, France
  • Formation: Bajocian limestone-marl sequences of the Paris Basin (formation unconfirmed)

Morphology & Features:

  • Strongly evolute shell with broad umbilicus
  • Sharp, widely spaced ribs, with occasional tuberculation
  • Flanks relatively flat; ribs extend across the venter without interruption
  • Characteristic of Bigotites, which is distinguished from contemporaneous forms by its ornamentation pattern

Scientific Notes:

  • Bigotites thevenini was described by de Grossouvre and named in the early 20th century
  • A rare genus important for understanding evolutionary transitions within Stephanoceratidae during the Bajocian

Notable Details:

  • Excellent preservation and detail; natural and unrestored
  • Ideal for academic study or high-end display collections
  • Scale Reference: Each square or cube in the image = 1cm. See photo for accurate sizing

Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and come with a Certificate of Authenticity. The fossil you see in the photo is the exact one you will receive.

 

This rare Bigotites thevenini ammonite offers both aesthetic appeal and palaeontological significance. A must-have for collectors of European Jurassic cephalopods.

 

(Actual as seen)

Only 1 left in stock

SKU: UF4272 Category:

Description

An exceptionally rare and well-preserved Bigotites thevenini Fossil Ammonite, from the Upper Bajocian Stage of the Jurassic Period, collected in Calvados, Normandy, France. This ammonite is a true collector’s piece, representing a less commonly encountered genus with distinctive ribbing and stratigraphic importance. Comes with a Certificate of Authenticity, and the exact fossil pictured is the one you will receive.

Fossil Type & Species:

  • Type: Ammonite (extinct marine cephalopod)
  • Species: Bigotites thevenini
  • Order: Ammonitida
  • Superfamily: Stephanoceratoidea
  • Family: Stephanoceratidae

Geological Context:

  • Period: Jurassic
  • Epoch/Stage: Middle Jurassic – Upper Bajocian (approx. 170.3 to 168.3 million years ago)
  • Biozone: Likely from the Parkinsonia or Garantiana zone (Bigotites often associated with finer zonal subdivisions in regional stratigraphy)
  • Depositional Environment: Marine shelf environment with alternating marl and limestone beds – rich in cephalopod fauna

Locality:

  • Region: Calvados, Normandy, France
  • Formation: Bajocian limestone-marl sequences of the Paris Basin (formation unconfirmed)

Morphology & Features:

  • Strongly evolute shell with broad umbilicus
  • Sharp, widely spaced ribs, with occasional tuberculation
  • Flanks relatively flat; ribs extend across the venter without interruption
  • Characteristic of Bigotites, which is distinguished from contemporaneous forms by its ornamentation pattern

Scientific Notes:

  • Bigotites thevenini was described by de Grossouvre and named in the early 20th century
  • A rare genus important for understanding evolutionary transitions within Stephanoceratidae during the Bajocian

Notable Details:

  • Excellent preservation and detail; natural and unrestored
  • Ideal for academic study or high-end display collections
  • Scale Reference: Each square or cube in the image = 1cm. See photo for accurate sizing

Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and come with a Certificate of Authenticity. The fossil you see in the photo is the exact one you will receive.

 

This rare Bigotites thevenini ammonite offers both aesthetic appeal and palaeontological significance. A must-have for collectors of European Jurassic cephalopods.

 

Additional information

Era

Jurassic

Origin

France

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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