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Rare: Acanthopleuroceras maugenesti Fossil Ammonite – Lower Pliensbachian, Lower Jurassic, Calvados France – Genuine + COA

Original price was: £48.00.Current price is: £43.20.

A rare and scientifically significant Acanthopleuroceras maugenesti Fossil Ammonite, from the Lower Pliensbachian Stage of the Lower Jurassic, collected in Calvados, Normandy, France. This ammonite is an excellent representative of the genus Acanthopleuroceras, recognised for its distinctive ribbing and shell morphology. The specimen shown in the photographs is the exact one you will receive and comes with a Certificate of Authenticity.

Fossil Type & Species:

  • Type: Ammonite (extinct marine cephalopod)
  • Species: Acanthopleuroceras maugenesti
  • Order: Ammonitida
  • Superfamily: Eoderoceratoidea
  • Family: Dactylioceratidae

Geological Context:

  • Period: Jurassic
  • Epoch/Stage: Lower Jurassic – Lower Pliensbachian (approx. 190.8 to 189 million years ago)
  • Biozone: Associated with the Maugenesti Subzone within the Jamesoni Zone, an important index horizon in the Lower Pliensbachian
  • Formation: Lower Lias Group
  • Depositional Environment: Marine shelf with alternating marls and limestones, excellent for preserving ammonites

Locality:

  • Region: Calvados, Normandy, France

Morphology & Features:

  • Evolute shell with relatively wide umbilicus
  • Strong ribbing, often bifurcating from the umbilical shoulder and continuing across the venter
  • Distinctive whorl section and ornamentation, typical of Acanthopleuroceras
  • Excellent preservation of diagnostic features

Scientific Notes:

  • Acanthopleuroceras maugenesti was first described by d’Orbigny (1844), a pioneering French palaeontologist
  • This species is an important zonal ammonite for defining Lower Pliensbachian sequences in NW Europe

Notable Details:

  • Rare French ammonite with strong ribbing and excellent preservation
  • 100% genuine, natural specimen with no restoration
  • Scale Reference: Each square or cube in the photo = 1cm. Please check the images for accurate sizing

Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and professionally curated. Each specimen is supplied with a Certificate of Authenticity. The fossil you see is the exact one you will receive.

 

This Acanthopleuroceras maugenesti ammonite is a rare and scientifically valuable fossil from the Lower Jurassic of Normandy – perfect for collectors, researchers, or display.

 

(Actual as seen)

Only 1 left in stock

SKU: UF4300 Category:

Description

A rare and scientifically significant Acanthopleuroceras maugenesti Fossil Ammonite, from the Lower Pliensbachian Stage of the Lower Jurassic, collected in Calvados, Normandy, France. This ammonite is an excellent representative of the genus Acanthopleuroceras, recognised for its distinctive ribbing and shell morphology. The specimen shown in the photographs is the exact one you will receive and comes with a Certificate of Authenticity.

Fossil Type & Species:

  • Type: Ammonite (extinct marine cephalopod)
  • Species: Acanthopleuroceras maugenesti
  • Order: Ammonitida
  • Superfamily: Eoderoceratoidea
  • Family: Dactylioceratidae

Geological Context:

  • Period: Jurassic
  • Epoch/Stage: Lower Jurassic – Lower Pliensbachian (approx. 190.8 to 189 million years ago)
  • Biozone: Associated with the Maugenesti Subzone within the Jamesoni Zone, an important index horizon in the Lower Pliensbachian
  • Formation: Lower Lias Group
  • Depositional Environment: Marine shelf with alternating marls and limestones, excellent for preserving ammonites

Locality:

  • Region: Calvados, Normandy, France

Morphology & Features:

  • Evolute shell with relatively wide umbilicus
  • Strong ribbing, often bifurcating from the umbilical shoulder and continuing across the venter
  • Distinctive whorl section and ornamentation, typical of Acanthopleuroceras
  • Excellent preservation of diagnostic features

Scientific Notes:

  • Acanthopleuroceras maugenesti was first described by d’Orbigny (1844), a pioneering French palaeontologist
  • This species is an important zonal ammonite for defining Lower Pliensbachian sequences in NW Europe

Notable Details:

  • Rare French ammonite with strong ribbing and excellent preservation
  • 100% genuine, natural specimen with no restoration
  • Scale Reference: Each square or cube in the photo = 1cm. Please check the images for accurate sizing

Authenticity & Guarantee: All of our fossils are 100% genuine, responsibly sourced, and professionally curated. Each specimen is supplied with a Certificate of Authenticity. The fossil you see is the exact one you will receive.

 

This Acanthopleuroceras maugenesti ammonite is a rare and scientifically valuable fossil from the Lower Jurassic of Normandy – perfect for collectors, researchers, or display.

 

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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