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Fossil Ammonite – Subvertibriceras – Upper Oxfordian, Jurassic – Nevers, France – Genuine with Certificate of Authenticity

Fossil Ammonite – Subvertibriceras – Upper Oxfordian, Jurassic – Nevers, France – Genuine with Certificate of Authenticity

£10.80

Fossil Ammonite – Subvertibriceras

Geological Period: Jurassic

Geological Stage: Upper Oxfordian (~157–154 million years ago)

Locality: Nevers, Nièvre, Bourgogne-Franche-Comté, France

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

This listing features a rare and scientifically notable fossil ammonite of the genus Subvertibriceras, originating from the Upper Oxfordian strata near Nevers, France. The fossil is a well-preserved specimen from a highly fossiliferous marine deposit, renowned for its diverse ammonite fauna and finely layered marls and limestones.

Scientific Classification:

  • Genus: Subvertibriceras
  • Family: Perisphinctidae
  • Superfamily: Perisphinctoidea
  • Order: Ammonitida
  • Geological Stage: Upper Oxfordian
  • Stratigraphic Position: Commonly associated with the Gregoryceras transversarium ammonite zone (Upper Oxfordian), though precise zonal attribution can vary slightly by locality.
  • Depositional Environment: Shallow marine shelf of the western Tethys. This area during the Oxfordian was a warm epicontinental sea, characterised by carbonate sedimentation and occasional anoxic layers.

Morphology & Notable Features:

Subvertibriceras is characterised by its evolute shell, compressed whorl section, and prominent ribbing. Ribs often bifurcate or trifurcate along the flanks, crossing over the venter. The shell ornamentation is strong and diagnostic, making it a useful genus for biostratigraphy within the Upper Oxfordian interval. It is a relatively rare genus within the Perisphinctidae family and typically less encountered than coeval genera such as Gregoryceras or Cardioceras.

Specimen Notes:

  • Scale reference is shown in the listing images: 1cm per square/cube
  • Please refer to the photographs for full sizing and condition — the fossil you see is the exact specimen you will receive.
  • This ammonite was carefully selected for its clarity of features and excellent preservation.

Ideal For:

  • Fossil and ammonite collectors
  • Academic and educational use
  • Display in museums or private collections
  • Gift for palaeontology enthusiasts

This beautiful ammonite from Nevers offers a glimpse into the rich marine ecosystems of the Late Jurassic, and is a true piece of Earth’s natural history.

(Actual as seen)

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Description

Fossil Ammonite – Subvertibriceras

Geological Period: Jurassic

Geological Stage: Upper Oxfordian (~157–154 million years ago)

Locality: Nevers, Nièvre, Bourgogne-Franche-Comté, France

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

This listing features a rare and scientifically notable fossil ammonite of the genus Subvertibriceras, originating from the Upper Oxfordian strata near Nevers, France. The fossil is a well-preserved specimen from a highly fossiliferous marine deposit, renowned for its diverse ammonite fauna and finely layered marls and limestones.

Scientific Classification:

  • Genus: Subvertibriceras
  • Family: Perisphinctidae
  • Superfamily: Perisphinctoidea
  • Order: Ammonitida
  • Geological Stage: Upper Oxfordian
  • Stratigraphic Position: Commonly associated with the Gregoryceras transversarium ammonite zone (Upper Oxfordian), though precise zonal attribution can vary slightly by locality.
  • Depositional Environment: Shallow marine shelf of the western Tethys. This area during the Oxfordian was a warm epicontinental sea, characterised by carbonate sedimentation and occasional anoxic layers.

Morphology & Notable Features:

Subvertibriceras is characterised by its evolute shell, compressed whorl section, and prominent ribbing. Ribs often bifurcate or trifurcate along the flanks, crossing over the venter. The shell ornamentation is strong and diagnostic, making it a useful genus for biostratigraphy within the Upper Oxfordian interval. It is a relatively rare genus within the Perisphinctidae family and typically less encountered than coeval genera such as Gregoryceras or Cardioceras.

Specimen Notes:

  • Scale reference is shown in the listing images: 1cm per square/cube
  • Please refer to the photographs for full sizing and condition — the fossil you see is the exact specimen you will receive.
  • This ammonite was carefully selected for its clarity of features and excellent preservation.

Ideal For:

  • Fossil and ammonite collectors
  • Academic and educational use
  • Display in museums or private collections
  • Gift for palaeontology enthusiasts

This beautiful ammonite from Nevers offers a glimpse into the rich marine ecosystems of the Late Jurassic, and is a true piece of Earth’s natural history.

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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