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RARE: 7" Proceratites (Siemiradzkia) phaulomorphus Fossil Ammonite – Lower Bathonian, Jurassic – Dijon, France | Authentic Ammonite Fossil
RARE: 7" Proceratites (Siemiradzkia) phaulomorphus Fossil Ammonite – Lower Bathonian, Jurassic – Dijon, France | Authentic Ammonite Fossil - Image 2

RARE: 7″ Proceratites (Siemiradzkia) phaulomorphus Fossil Ammonite – Lower Bathonian, Jurassic – Dijon, France | Authentic Ammonite Fossil

£36.00

This listing features a RARE and striking 7-inch fossil ammonite of Proceratites (Siemiradzkia) phaulomorphus, discovered near Dijon, France, from the Lower Bathonian Stage of the Middle Jurassic period. This impressive ammonite is a superb and uncommon find from an important biostratigraphic interval in the European Jurassic.

As with all our items, this specimen is 100% genuine and comes with a Certificate of Authenticity. The fossil shown in the photos is the exact piece you will receive. For full sizing, please refer to the scale image (each square/cube = 1cm).

Fossil Overview:

  • Species: Proceratites (Siemiradzkia) phaulomorphus
  • Common Name: Fossil Ammonite
  • Geological Period: Jurassic
  • Stage: Lower Bathonian (~168–166 million years ago)
  • Location: Dijon, Côte-d’Or, Bourgogne-Franche-Comté, France
  • Preservation: Excellent detail with visible suture lines and whorl structure

Geological & Depositional Environment:

The fossil originates from marine sediments deposited during the Lower Bathonian, a time of significant faunal turnover in the Jurassic epicontinental seas of Europe. These marine environments consisted of relatively shallow, warm carbonate platforms, rich in ammonite diversity. The region around Dijon preserves a number of classic Bathonian ammonite-bearing strata, which have been studied for their biostratigraphic significance.

Stratigraphic & Taxonomic Context:

  • Phylum: Mollusca
  • Class: Cephalopoda
  • Subclass: Ammonoidea
  • Order: Ammonitida
  • Superfamily: Stephanoceratoidea
  • Family: Otoitidae
  • Genus: Proceratites (Subgenus: Siemiradzkia)
  • Species: phaulomorphus

This taxon was originally described and revised based on diagnostic shell morphology and stratigraphic range. It is used regionally in correlation of Lower Bathonian strata.

Morphological Features:

  • Involute coiling with a moderately compressed whorl section
  • Fine ribbing across the flanks, often fading near the venter
  • Rounded to slightly keeled venter
  • Subtle tuberculation or swellings along rib intersections (in some variants)
  • Well-defined suture patterns, visible in quality preservation

These morphological traits suggest a nektonic lifestyle, with the ammonite likely being an active swimmer, feeding on smaller marine organisms.

Notable Information:

  • Rare and regionally distinctive ammonite from a biostratigraphically important horizon
  • Excellent preservation from the classic Jurassic outcrops of eastern France
  • A scientifically and visually valuable specimen ideal for collectors, educators, or display

Why Buy From Us?

  • All fossils are 100% genuine natural specimens
  • Each purchase comes with a Certificate of Authenticity
  • The exact specimen pictured is what you will receive
  • Expertly packed and promptly shipped

Own a genuine piece of Earth history with this rare Proceratites (Siemiradzkia) phaulomorphus ammonite – a stunning example of Jurassic marine life from the fossil-rich layers of France.

(Actual as seen)

Only 1 left in stock

SKU: UF4655 Category:

Description

This listing features a RARE and striking 7-inch fossil ammonite of Proceratites (Siemiradzkia) phaulomorphus, discovered near Dijon, France, from the Lower Bathonian Stage of the Middle Jurassic period. This impressive ammonite is a superb and uncommon find from an important biostratigraphic interval in the European Jurassic.

As with all our items, this specimen is 100% genuine and comes with a Certificate of Authenticity. The fossil shown in the photos is the exact piece you will receive. For full sizing, please refer to the scale image (each square/cube = 1cm).

Fossil Overview:

  • Species: Proceratites (Siemiradzkia) phaulomorphus
  • Common Name: Fossil Ammonite
  • Geological Period: Jurassic
  • Stage: Lower Bathonian (~168–166 million years ago)
  • Location: Dijon, Côte-d’Or, Bourgogne-Franche-Comté, France
  • Preservation: Excellent detail with visible suture lines and whorl structure

Geological & Depositional Environment:

The fossil originates from marine sediments deposited during the Lower Bathonian, a time of significant faunal turnover in the Jurassic epicontinental seas of Europe. These marine environments consisted of relatively shallow, warm carbonate platforms, rich in ammonite diversity. The region around Dijon preserves a number of classic Bathonian ammonite-bearing strata, which have been studied for their biostratigraphic significance.

Stratigraphic & Taxonomic Context:

  • Phylum: Mollusca
  • Class: Cephalopoda
  • Subclass: Ammonoidea
  • Order: Ammonitida
  • Superfamily: Stephanoceratoidea
  • Family: Otoitidae
  • Genus: Proceratites (Subgenus: Siemiradzkia)
  • Species: phaulomorphus

This taxon was originally described and revised based on diagnostic shell morphology and stratigraphic range. It is used regionally in correlation of Lower Bathonian strata.

Morphological Features:

  • Involute coiling with a moderately compressed whorl section
  • Fine ribbing across the flanks, often fading near the venter
  • Rounded to slightly keeled venter
  • Subtle tuberculation or swellings along rib intersections (in some variants)
  • Well-defined suture patterns, visible in quality preservation

These morphological traits suggest a nektonic lifestyle, with the ammonite likely being an active swimmer, feeding on smaller marine organisms.

Notable Information:

  • Rare and regionally distinctive ammonite from a biostratigraphically important horizon
  • Excellent preservation from the classic Jurassic outcrops of eastern France
  • A scientifically and visually valuable specimen ideal for collectors, educators, or display

Why Buy From Us?

  • All fossils are 100% genuine natural specimens
  • Each purchase comes with a Certificate of Authenticity
  • The exact specimen pictured is what you will receive
  • Expertly packed and promptly shipped

Own a genuine piece of Earth history with this rare Proceratites (Siemiradzkia) phaulomorphus ammonite – a stunning example of Jurassic marine life from the fossil-rich layers of France.

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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