Description
This listing features a rare and genuine fossil ammonite of the species Acanthoceras vergonense, originating from the Lower Cenomanian Stage of the Late Cretaceous Period, collected from the fossiliferous chalk beds near Montagne, France. This chalk-preserved ammonite represents a spectacular example of the genus known for its distinct morphological features and paleobiological importance.
This stunning 100% authentic specimen comes from a careful selection and is the exact fossil shown in the listing images. It includes a Certificate of Authenticity for complete buyer confidence and scientific accuracy.
Geological & Palaeontological Details:
- Species: Acanthoceras vergonense
- Genus: Acanthoceras
- Geological Period: Cretaceous
- Geological Stage: Lower Cenomanian (~100.5 to 93.9 million years ago)
- Locality: Montagne, France
- Depositional Environment: Chalk-rich marine platform; open epicontinental sea dominated by carbonate sedimentation
- Order: Ammonitida
- Superfamily: Acanthoceratoidea
- Family: Acanthoceratidae
- Biozone: Likely associated with the Mantelliceras mantelli or Mantelliceras dixoni zones (depending on stratigraphic position)
- Formal Identification: Acanthoceras vergonense was formally recognised as part of the mid-Cretaceous ammonite fauna of the European Tethyan margin, described through successive stratigraphic surveys and monographs across France and Western Europe.
Morphological Features:
- Characteristic strong ribbing with pronounced tubercles on the flanks
- Broad, compressed whorls with a rounded venter
- Moderate involution with ornamented growth lines
- Chalk preservation enhances structural detail with high contrast
Notable Information:
- Acanthoceras species are biostratigraphically significant for zonal correlation in the Cenomanian stage.
- Fossils from the French chalk formations are particularly valued for their exceptional preservation and context in global Cretaceous ammonite biogeography.
- The Acanthoceras vergonense represents an important part of the ammonoid radiation following the Albian-Cenomanian boundary.
Authenticity & Presentation:
- 100% genuine fossil specimen, not a cast or reproduction
- Comes with Certificate of Authenticity
- Scale cube = 1cm in photo for accurate sizing
- You will receive the exact specimen pictured in the listing images
This is a beautifully preserved and rare Acanthoceras vergonense ammonite ideal for collectors, researchers, or museum-quality display.
All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.






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