RARE 6.5" Siemiradzkia aurigera Fossil Ammonite | Bathonian Jurassic | Nevers France | Authentic Certified Specimen
£ 42.00
A rare and finely preserved 6.5" fossil ammonite: Siemiradzkia aurigera from the
Bathonian Stage of the Middle Jurassic, discovered near Nevers, France. This elegant ammonite exemplifies the intricate shell structure and ornamentation characteristic of mid-Jurassic ammonites and is a scientifically and visually significant piece for collectors or institutions.You will receive the exact specimen shown in the photographs, carefully selected and professionally documented. A 1cm scale cube is included for precise sizing—please refer to the images for full details. Geological & Palaeontological Information:
• Fossil Type: Ammonite
• Species: Siemiradzkia aurigera (originally described by d'Orbigny)
• Geological Period: Jurassic
• Stage: Bathonian (~168 to 166 million years ago)
• Location: Nevers, Nièvre Department, France
• Depositional Environment: Shallow epicontinental marine basin with carbonate-rich sediments
• Order: Ammonitida
• Superfamily: Stephanoceratoidea
• Family: Morphoceratidae
• Biozone (Inferred): Possibly from the Zigzag Zone or Retrocostatum Zone, commonly associated with Middle Bathonian ammonites in this region Morphological Features:
• Elegantly ribbed, involute shell with compressed whorls
• Faint keel or smooth venter depending on growth stage and preservation
• Radiating ribs which may bifurcate or curve slightly forward near the ventrolateral edge
• Often shows fine suture patterns under appropriate lighting or preparation Notable Points:
• Siemiradzkia aurigera is a relatively uncommon Bathonian ammonite species, typically restricted to select stratigraphic horizons in central France
• Named and classified by Alcide d'Orbigny, one of the pioneers of Jurassic palaeontology
• Mid-Jurassic fossils from Nevers are increasingly scarce on the market, especially of this quality and size Why This Fossil is Special:
• Rare European ammonite species with academic and collector interest
• Beautiful shell architecture and excellent preservation
• Comes with a Certificate of Authenticity for full verification
• Ethically sourced and 100% natural
• Perfect for serious fossil collectors, academic institutions, or display
Bathonian Stage of the Middle Jurassic, discovered near Nevers, France. This elegant ammonite exemplifies the intricate shell structure and ornamentation characteristic of mid-Jurassic ammonites and is a scientifically and visually significant piece for collectors or institutions.You will receive the exact specimen shown in the photographs, carefully selected and professionally documented. A 1cm scale cube is included for precise sizing—please refer to the images for full details. Geological & Palaeontological Information:
• Fossil Type: Ammonite
• Species: Siemiradzkia aurigera (originally described by d'Orbigny)
• Geological Period: Jurassic
• Stage: Bathonian (~168 to 166 million years ago)
• Location: Nevers, Nièvre Department, France
• Depositional Environment: Shallow epicontinental marine basin with carbonate-rich sediments
• Order: Ammonitida
• Superfamily: Stephanoceratoidea
• Family: Morphoceratidae
• Biozone (Inferred): Possibly from the Zigzag Zone or Retrocostatum Zone, commonly associated with Middle Bathonian ammonites in this region Morphological Features:
• Elegantly ribbed, involute shell with compressed whorls
• Faint keel or smooth venter depending on growth stage and preservation
• Radiating ribs which may bifurcate or curve slightly forward near the ventrolateral edge
• Often shows fine suture patterns under appropriate lighting or preparation Notable Points:
• Siemiradzkia aurigera is a relatively uncommon Bathonian ammonite species, typically restricted to select stratigraphic horizons in central France
• Named and classified by Alcide d'Orbigny, one of the pioneers of Jurassic palaeontology
• Mid-Jurassic fossils from Nevers are increasingly scarce on the market, especially of this quality and size Why This Fossil is Special:
• Rare European ammonite species with academic and collector interest
• Beautiful shell architecture and excellent preservation
• Comes with a Certificate of Authenticity for full verification
• Ethically sourced and 100% natural
• Perfect for serious fossil collectors, academic institutions, or display
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