VERY RARE Heteromorph Ammonite Scaphites Hoploscaphites mandanensis (Iridescent), Pierre Shales, Maastrichtian, Late Cretaceous: USA – COA

Description

This VERY RARE Heteromorph ammonite, Scaphites mandanensis (also known as Hoploscaphites mandanensis), is a gorgeous iridescent specimen from the Maastrichtian stage of the Late Cretaceous period. Found in the Pierre Shales and Fox Hills Sandstone formations in Egremont, South Dakota, USA, this remarkable ammonite features stunning details and an exceptional preservation of its heteromorphic shape, making it a highly coveted fossil for collectors and enthusiasts alike.

Geology and Fossil Type

• Fossil Type: Heteromorph Ammonite
• Species: Scaphites mandanensis (formerly known as Hoploscaphites mandanensis)
• Geological Stage: Maastrichtian, Late Cretaceous
• Depositional Environment: Marine
• Zone: Pierre Shales, Fox Hills Sandstone
• Family: Scaphitidae
• Superfamily: Ammonoidea
• Order: Ammonitida

Morphology Features

• Iridescent Shell: This ammonite features a beautiful iridescent sheen, making it stand out from other ammonites in terms of both visual appeal and rarity.
• Distinct Heteromorphic Coiling: As a heteromorph, this ammonite has an irregular, coiled structure, offering a unique glimpse into the evolutionary adaptations of the Cretaceous period.
• Well-Preserved Suture Lines: The suture lines are easily visible, providing insight into the internal structure of the ammonite and enhancing its scientific value.

Notable Features

• Highly Sought-After: Scaphites mandanensis, with its rare iridescent shell and irregular coiling, is a collector’s dream, known for its beauty and rarity.
• Pristine Condition: This fossil is exceptionally well-preserved, with minimal damage and intact features that make it a standout in any fossil collection.
• Distinctive Shell Features: The nodular ridges and distinct coiling make this ammonite fossil especially notable, offering a highly detailed and study-worthy specimen.

Scientific and Historical Value

• The Maastrichtian stage of the Late Cretaceous represents the final phase of the Mesozoic era, making fossils from this time particularly valuable for understanding the geological changes that occurred before the mass extinction event.
• The Pierre Shales and Fox Hills Sandstone formations where this fossil was found are known for their rich deposits of marine fossils, providing insight into the biodiversity of the Late Cretaceous seas.

Size and Presentation

• Scale Cube: 1cm
• Full Size: Please see the photo for exact measurements. This fossil has been carefully chosen for its size, quality, and appearance.
• The photo shown is of the exact specimen you will receive, ensuring you know exactly what you’re purchasing.

Key Selling Points

• 100% Genuine Fossil
• Comes with Certificate of Authenticity
• Rare iridescent heteromorph ammonite: Scaphites mandanensis (formerly Hoploscaphites mandanensis)
• Found in the Maastrichtian, Late Cretaceous period in Egremont, South Dakota, USA
• Exceptional iridescent and heteromorphic structure
• Highly sought-after for fossil collectors, marine fossil enthusiasts, and Cretaceous period lovers
• Ideal for display, study, or as a unique collector’s piece
• Stunning visual appeal with iridescence and clear suture lines

This Scaphites mandanensis (formerly Hoploscaphites mandanensis) fossil, from the Maastrichtian stage of the Late Cretaceous, is a rare and highly valuable fossil. The iridescent sheen, distinctive coiling, and preserved suture lines make it a truly exceptional specimen, perfect for fossil collectors and marine life enthusiasts. With a Certificate of Authenticity, this is an ideal addition to any Cretaceous fossil collection.