VERY RARE Heteromorph Ammonite Scaphites – Jeletzkytes planus, Pierre Shales, Maastrichtian, Late Cretaceous: Egremont, USA – COA

Description

This VERY RARE Heteromorph ammonite fossil, Scaphites – Jeletzkytes planus, is a unique specimen from the Pierre Shales and Fox Hills Sandstone formations, dating back to the Maastrichtian, Late Cretaceous period. Found in Egremont, South Dakota, USA, this ammonite is a 100% genuine specimen and comes with a Certificate of Authenticity. This fossil stands out for its heteromorphic shape and excellent preservation, making it a highly sought-after piece for collectors and enthusiasts alike.

Geology and Fossil Type

• Geological Stage: Maastrichtian, Late Cretaceous
• Depositional Environment: Marine (The Pierre Shales and Fox Hills Sandstone were part of an ancient marine environment during the Maastrichtian period, making them ideal for the preservation of ammonites like Jeletzkytes planus.)
• Family: Scaphitidae (This ammonite belongs to the Scaphitidae family, known for its heteromorphic ammonite shapes.)
• Superfamily: Ammonoidea
• Order: Ammonitida (Ammonites are cephalopods related to modern squid, cuttlefish, and octopuses.)

Morphology Features

This Jeletzkytes planus ammonite is a heteromorphic ammonite, meaning its coiling pattern deviates from the typical spiral and features an irregular, corkscrew-like shape. The fossil has been well-preserved, showcasing the intricate suture lines and distinctive coiling structure that makes this species so fascinating. The distinctive uncoiled form is characteristic of heteromorph ammonites, setting it apart from typical spiral ammonites.

Notable Features

• Rare and Collectible: Jeletzkytes planus is an extremely rare ammonite with a distinct and irregular coiling, making it highly collectible.
• Visible Suture Lines: The suture lines are clearly visible, providing insight into the complex internal structure of the fossil.
• Well-Preserved Structure: The fossil’s surface features and morphology remain well-preserved, showcasing the unusual shape and fine details of the species.

Scientific and Historical Value

This Jeletzkytes planus ammonite is an important specimen for understanding the evolutionary diversity of ammonites during the Late Cretaceous period. The species lived in marine environments and exhibited heteromorphic coiling patterns, making it an intriguing example of evolutionary adaptation. As a rare fossil, it is highly valued for its historical significance and scientific contributions to our understanding of ancient marine life.

Size and Presentation

• Scale Cube: 1cm
• Full sizing details are provided in the photos, which offer an accurate visual representation of the actual specimen you will receive.
• Actual Fossil: The fossil pictured is the exact specimen you will receive, showcasing its unique features and preservation.

Key Selling Points

• 100% Genuine Fossil
• Comes with a Certificate of Authenticity
• Extremely Rare Heteromorph Ammonite Jeletzkytes planus from the Pierre Shales and Fox Hills Sandstone
• Found in Egremont, South Dakota, dating to the Maastrichtian, Late Cretaceous period
• Features visible suture lines, irregular coiling, and a well-preserved surface
• Ideal for collectors of Cretaceous ammonites and marine fossils
• Perfect for display, study, or as a unique collectible item

This Jeletzkytes planus ammonite from the Pierre Shales and Fox Hills Sandstone of South Dakota, USA, is a highly collectible, scientifically significant fossil from the Late Cretaceous period. Its heteromorphic shape, visible suture lines, and excellent preservation make it a standout addition to any fossil collection.