VERY RARE Heteromorph Ammonite Scaphites – Discoscaphites nebrascensis, Maastrichtian, Late Cretaceous, Egremont, South Dakota, USA – COA

Description

This VERY RARE Heteromorph ammonite, Scaphites – Discoscaphites nebrascensis, is an exceptional specimen from the Pierre Shales and Fox Hills Sandstone formations, dating to the Maastrichtian, Late Cretaceous period. It was discovered in Egremont, South Dakota, USA. This fossil is 100% genuine, accompanied by a Certificate of Authenticity, ensuring its provenance and quality. The Discoscaphites nebrascensis is a heteromorph ammonite, known for its distinctive coiling and unique appearance, making it a prized find for serious collectors of Cretaceous ammonites.

Geology and Fossil Type

• Geological Stage: Maastrichtian, Late Cretaceous
• Depositional Environment: Marine (The Discoscaphites nebrascensis ammonite lived during the Late Cretaceous, a time when the Pierre Shales and Fox Hills Sandstone formations were part of the marine environments in South Dakota. This ammonite fossil is preserved in the marine sediments that were deposited by ancient seas.)
• Family: Scaphitidae (The Scaphites species belongs to the Scaphitidae family, known for their heteromorphic ammonites, which exhibit unusual coiling patterns compared to typical coiled ammonites.)
• Superfamily: Ammonoidea
• Order: Ammonitida (The Scaphites ammonite, like other ammonites, belongs to the Cephalopoda class, which also includes modern squid, cuttlefish, and octopuses.)

Morphology Features

This Discoscaphites nebrascensis fossil is a heteromorphic ammonite featuring a distinctive, uncoiled spiral shape, often described as a knobbly, corkscrew-like appearance. The ammonite’s shell is asymmetrical, with irregular coiling patterns that set it apart from typical ammonites. The ribbing and distinctive suture lines are visible along the surface, adding to its scientific and aesthetic value. The unusual shape of the fossil makes it a standout specimen for collectors.

Notable Features

• Very Rare Heteromorph: The Discoscaphites nebrascensis is a rare species of heteromorphic ammonite, making it an especially valuable find.
• Unique Coiling: Its unusual corkscrew shape and asymmetric coiling make this ammonite an intriguing example of Cretaceous marine life.
• Well-Preserved: The Preservation of this fossil is excellent, with the ribbing and suture lines still clearly visible. The fossil displays its distinctive knobby texture, which is characteristic of this ammonite species.
• Scientific Significance: The Scaphites ammonite family, and Discoscaphites nebrascensis in particular, are valuable for understanding the diverse marine ecosystems of the Late Cretaceous period.

Size and Presentation

• Scale Cube: 1cm
• Full sizing is provided in the photos, so you can see the exact size of the ammonite.
• Actual Fossil: The fossil pictured is the exact piece you will receive.

Key Selling Points

• 100% Genuine Fossil
• Comes with a Certificate of Authenticity
• Very rare and unique Scaphites nebrascensis ammonite, featuring heteromorphic, uncoiled spiral form
• Found in the Pierre Shales and Fox Hills Sandstone of South Dakota, from the Maastrichtian, Late Cretaceous
• Distinctive corkscrew-like coiling, knobbly texture, and visible suture lines
• Perfect for collectors and those interested in Cretaceous ammonites and marine fossils

This Discoscaphites nebrascensis ammonite from the Pierre Shales and Fox Hills Sandstone of Egremont, South Dakota, USA is an extraordinary find from the Maastrichtian, Late Cretaceous period. Its unique, corkscrew-like shape, knobbly texture, and unusual coiling make it an exceptional specimen for fossil collectors and those interested in the marine life of the Cretaceous period.