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RARE Perisphinctes (Dichotomoceras) dichotomum S Ammonite Fossil | Upper Oxfordian Jurassic | Anjou, France | Genuine Fossil w/ COA
RARE Perisphinctes (Dichotomoceras) dichotomum S Ammonite Fossil | Upper Oxfordian Jurassic | Anjou, France | Genuine Fossil w/ COA - Image 2

RARE Perisphinctes (Dichotomoceras) dichotomum S Ammonite Fossil | Upper Oxfordian Jurassic | Anjou, France | Genuine Fossil w/ COA

£84.00

Presenting a RARE specimen of Perisphinctes (Dichotomoceras) dichotomum S, an ammonite fossil from the Upper Oxfordian stage of the Late Jurassic, collected in Anjou, western France—a region known for producing beautifully preserved ammonite fossils from classic Jurassic marine strata.

This specimen belongs to the genus Perisphinctes, subgenus Dichotomoceras, specifically the species dichotomum. It is recognised for its elegant, bifurcating rib structure, which gives it a distinctive look. The shell is involute and moderately compressed, with ribs that typically split into two at the mid-flank, giving the fossil a pleasingly symmetric and ornate appearance.

This is the exact specimen shown in the photographs, accompanied by a scale cube (1cm squares) for accurate reference. As always, all of our fossils are 100% genuine, and include a Certificate of Authenticity.

Geological & Scientific Information:

  • Species: Perisphinctes (Dichotomoceras) dichotomum S
  • Type: Fossil Ammonite (extinct marine cephalopod mollusc)
  • Geological Period: Jurassic
  • Stage: Upper Oxfordian (approx. 160–157 million years ago)
  • Location Found: Anjou, Maine-et-Loire, France
  • Order: Ammonitida
  • Superfamily: Perisphinctoidea
  • Family: Perisphinctidae
  • Morphological Features: Involute, compressed whorls with fine, regularly bifurcating ribs; moderately narrow umbilicus; pronounced ventral keel
  • Biozone (if applicable): Often associated with the Gregoryceras transversarium Zone of the Upper Oxfordian
  • Depositional Environment: Shallow shelf marine basin with calcareous mud and marl sediments deposited during transgressive sea level cycles in the Paris Basin region
  • Scientific Importance: Perisphinctes dichotomum is frequently used in zonal schemes for biostratigraphic dating of the Upper Oxfordian across western Europe

Additional Notes:

This ammonite is a prized example of Dichotomoceras, known for its highly bifurcate ribbing and elegance. Its preservation and provenance make it an excellent display specimen or addition to a zonal reference collection.

Why Buy From Us?

  • Every specimen is 100% genuine, verified by experts
  • Includes a Certificate of Authenticity
  • You will receive the actual fossil pictured
  • Perfect for collectors, educational use, or scientific study

Don’t miss this opportunity to own a rare and beautifully preserved Perisphinctes (Dichotomoceras) dichotomum ammonite from the Jurassic of France—an iconic fossil from a classic location.

(Actual as seen)

Only 1 left in stock

SKU: UF3845 Category:

Description

Presenting a RARE specimen of Perisphinctes (Dichotomoceras) dichotomum S, an ammonite fossil from the Upper Oxfordian stage of the Late Jurassic, collected in Anjou, western France—a region known for producing beautifully preserved ammonite fossils from classic Jurassic marine strata.

This specimen belongs to the genus Perisphinctes, subgenus Dichotomoceras, specifically the species dichotomum. It is recognised for its elegant, bifurcating rib structure, which gives it a distinctive look. The shell is involute and moderately compressed, with ribs that typically split into two at the mid-flank, giving the fossil a pleasingly symmetric and ornate appearance.

This is the exact specimen shown in the photographs, accompanied by a scale cube (1cm squares) for accurate reference. As always, all of our fossils are 100% genuine, and include a Certificate of Authenticity.

Geological & Scientific Information:

  • Species: Perisphinctes (Dichotomoceras) dichotomum S
  • Type: Fossil Ammonite (extinct marine cephalopod mollusc)
  • Geological Period: Jurassic
  • Stage: Upper Oxfordian (approx. 160–157 million years ago)
  • Location Found: Anjou, Maine-et-Loire, France
  • Order: Ammonitida
  • Superfamily: Perisphinctoidea
  • Family: Perisphinctidae
  • Morphological Features: Involute, compressed whorls with fine, regularly bifurcating ribs; moderately narrow umbilicus; pronounced ventral keel
  • Biozone (if applicable): Often associated with the Gregoryceras transversarium Zone of the Upper Oxfordian
  • Depositional Environment: Shallow shelf marine basin with calcareous mud and marl sediments deposited during transgressive sea level cycles in the Paris Basin region
  • Scientific Importance: Perisphinctes dichotomum is frequently used in zonal schemes for biostratigraphic dating of the Upper Oxfordian across western Europe

Additional Notes:

This ammonite is a prized example of Dichotomoceras, known for its highly bifurcate ribbing and elegance. Its preservation and provenance make it an excellent display specimen or addition to a zonal reference collection.

Why Buy From Us?

  • Every specimen is 100% genuine, verified by experts
  • Includes a Certificate of Authenticity
  • You will receive the actual fossil pictured
  • Perfect for collectors, educational use, or scientific study

Don’t miss this opportunity to own a rare and beautifully preserved Perisphinctes (Dichotomoceras) dichotomum ammonite from the Jurassic of France—an iconic fossil from a classic location.

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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