VERY RARE Heteromorph Ammonite Scaphites Acanthoscaphites sp. (cf. tridens), Santonian, Cretaceous: Montana, USA – COA

Description

This VERY RARE Heteromorph Ammonite specimen from the Scaphites Acanthoscaphites sp. (cf. tridens) species is an exceptional example of Late Cretaceous ammonite fossils, dated to the Santonian stage of the Cretaceous period. Found in the Pierre Shales and Fox Hills Sandstone formations of Montana, USA, this ammonite is highly prized for its distinctive morphology and excellent preservation.

Geology and Fossil Type

• Fossil Type: Ammonite
• Species: Scaphites Acanthoscaphites sp. (cf. tridens)
• Geological Stage: Santonian, Cretaceous
• Depositional Environment: Marine
• Zone: Pierre Shales, Fox Hills Sandstone
• Family: Acanthoscaphitidae
• Superfamily: Ammonoidea
• Order: Ammonitida

Morphology Features

• Heteromorph Shape: This ammonite is from the heteromorph group, meaning it exhibits an unusual, coiled shape, making it distinct from other typical ammonites. The Scaphites genus is known for its irregular spiral and elongated whorls, setting it apart as a unique fossil.
• Distinctive Suture Lines: The specimen exhibits clearly visible suture lines, the points where the shell chambers divide. These lines are especially detailed, making it a highly collectible piece.
• Size: Please refer to the photo for the full dimensions of the fossil. The scale rule in the image is 1cm, ensuring that you can judge the size accurately.

Notable Features

• Extremely Rare: The Scaphites Acanthoscaphites sp. (cf. tridens) is a relatively rare heteromorph ammonite species, making this Santonian ammonite fossil highly desirable for collectors.
• Exceptional Preservation: This ammonite is beautifully preserved, with well-defined details of its spiral structure, including visible chambers and whorls.
• Scientific Significance: The Pierre Shales and Fox Hills Sandstone formations of Montana are rich in Late Cretaceous marine life fossils, offering insight into ancient marine ecosystems.

Scientific and Historical Value

• Fossils from the Santonian stage of the Cretaceous period are crucial for understanding the marine biodiversity of the time. This ammonite provides an important glimpse into ancient marine ecosystems, with Scaphites ammonites being key species that thrived during this period.
• The Pierre Shales and Fox Hills Sandstone formations are famous for yielding well-preserved fossils that offer valuable information about the marine reptiles, ammonites, and other marine fauna that existed in the Late Cretaceous.

Size and Presentation

• Scale Cube: 1cm
• Full Size: Please refer to the photo for full size details. This fossil has been carefully chosen for its unique features and outstanding preservation.
• The photo shown is the actual specimen you will receive, ensuring that you get exactly what you see in the listing.

Key Selling Points

• 100% Genuine Fossil
• Comes with a Certificate of Authenticity
• Extremely rare heteromorph ammonite from the Santonian stage of the Cretaceous period
• Found in the Pierre Shales and Fox Hills Sandstone formations, Montana, USA
• Beautifully preserved with well-defined spiral coiling, suture lines, and chamber details
• Ideal for fossil collectors, scientific research, or as a unique display piece
• Perfect for marine life enthusiasts, ammonite collectors, or paleontology lovers

This VERY RARE Heteromorph Ammonite specimen from the Santonian stage, Cretaceous period, is a highly valuable and beautifully preserved fossil. Its distinctive coiling, detailed suture lines, and excellent preservation make it a sought-after addition for fossil collectors and paleontology enthusiasts. This fossil comes with a Certificate of Authenticity, ensuring its genuine nature. Don’t miss the opportunity to own a piece of Cretaceous marine life!