Description
This VERY RARE Heteromorph ammonite fossil, Scaphites – Hoploscaphites nicoletti, is a stunning specimen from the Pierre Shales and Fox Hills Sandstone formations of Egremont, South Dakota, USA. It is from the Maastrichtian, Late Cretaceous period, and is iridescent, adding a beautiful feature to its already unique, heteromorphic shape. This is a 100% genuine specimen and comes with a Certificate of Authenticity, making it a perfect addition for both fossil enthusiasts and serious collectors.
Geology and Fossil Type
- Geological Stage: Maastrichtian, Late Cretaceous
- Depositional Environment: Marine (The Pierre Shales and Fox Hills Sandstone were once a shallow marine environment, providing ideal conditions for ammonite fossils like Hoploscaphites.)
- Family: Scaphitidae (The Hoploscaphites genus belongs to the Scaphitidae family, known for its heteromorphic ammonite shapes.)
- Superfamily: Ammonoidea
- Order: Ammonitida (A subclass of cephalopods related to squids, octopuses, and cuttlefish.)
Morphology Features
The Hoploscaphites nicoletti ammonite is a heteromorphic ammonite, characterized by its irregular and corkscrew-like coiling. This iridescent specimen displays a highly preserved form with an intricate structure, showcasing the characteristic features of heteromorphic ammonites. The suture lines are visible, further enhancing the specimen’s scientific value.
Notable Features
- Rare and Collectible: This Hoploscaphites ammonite is extremely rare due to its irregular coiling and iridescent feature, making it a sought-after fossil for collectors.
- Iridescent Coloration: The iridescent sheen is a unique feature, making it a standout specimen in any fossil collection.
- Visible Suture Lines: The specimen’s suture lines are clearly visible, offering insight into the internal shell structure.
- Excellent Preservation: The ammonite retains much of its original form, with the irregular corkscrew shape and visible suture lines well-preserved.
Scientific and Historical Value
This Hoploscaphites nicoletti ammonite is a fascinating representation of the evolutionary diversity of ammonites during the Late Cretaceous period. The heteromorphic shape of Scaphites is a prime example of the evolutionary adaptations ammonites underwent to survive in marine environments. Fossils like this one are highly valued for their scientific significance and historical value.
Size and Presentation
- Scale Cube: 1cm
- Full sizing details are available in the photos, which show the exact dimensions of the fossil.
- Actual Fossil: The fossil pictured is the exact specimen you will receive, and it is carefully chosen for its iridescent features and excellent preservation.
Key Selling Points
- 100% Genuine Fossil
- Comes with a Certificate of Authenticity
- Extremely Rare Heteromorphic Ammonite Hoploscaphites nicoletti
- Found in Pierre Shales and Fox Hills Sandstone of South Dakota, USA, dating back to the Maastrichtian, Late Cretaceous period
- Features iridescent coloration, visible suture lines, and well-preserved morphology
- Ideal for collectors of Late Cretaceous ammonites and marine fossils
- Perfect for display, study, or as a unique collector’s item
This Hoploscaphites nicoletti ammonite from the Pierre Shales and Fox Hills Sandstone of South Dakota, USA is an extremely rare, scientifically significant fossil from the Late Cretaceous period. Its iridescent coloration, heteromorphic shape, and visible suture lines make it a unique piece for any fossil collection. This fossil offers both scientific value and aesthetic appeal, making it the perfect addition to any collection.






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