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VERY RARE Fossil Heteromorph Ammonite SCAPHITES NODOSUS – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA
VERY RARE Fossil Heteromorph Ammonite SCAPHITES NODOSUS – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA - Image 2
VERY RARE Fossil Heteromorph Ammonite SCAPHITES NODOSUS – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA - Image 3
VERY RARE Fossil Heteromorph Ammonite SCAPHITES NODOSUS – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA - Image 4

VERY RARE Fossil Heteromorph Ammonite SCAPHITES NODOSUS – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA

£132.00

Presenting a VERY RARE and scientifically valuable fossil heteromorph ammonite: Scaphites nodosus, from the Fox Hills Formation, part of the Pierre Shale Group, collected in South Dakota, USA. This specimen is a striking example of a heteromorph ammonite with its distinctive coiled-to-uncoiled shell morphology, emblematic of ammonite evolutionary experimentation during the Late Cretaceous.

Scaphites nodosus belongs to the family Scaphitidae, superfamily Scaphitoidea, and order Ammonitida. This species is noted for its characteristic compressed shell with a partially uncoiled body chamber, and prominent tubercles or nodes along the ribs—traits that have fascinated paleontologists for decades.

Geological & Scientific Details:

  • Scientific Name: Scaphites nodosus
  • Fossil Type: Heteromorph Ammonite
  • Geological Period: Cretaceous
  • Stage: Maastrichtian (approx. 72–66 million years ago)
  • Formation: Fox Hills Formation (Pierre Shale Group)
  • Location Found: South Dakota, United States
  • Order: Ammonitida
  • Superfamily: Scaphitoidea
  • Family: Scaphitidae
  • Morphological Features: Strongly ribbed, tuberculate shell with an initial tightly coiled inner whorl followed by a straight to recurved outer body chamber
  • Depositional Environment: Shallow marine setting along the margins of the Western Interior Seaway

Scaphites nodosus is widely used in biostratigraphy for the Maastrichtian stage due to its well-defined stratigraphic range and unique morphology. Its shell design and ornamentation make it a standout species among Cretaceous heteromorph ammonites.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

Please Note:

  • Scale Rule Squares / Cube = 1cm – full sizing is shown in the photo
  • The fossil pictured is the exact specimen you will receive, carefully selected for quality, preservation, and scientific interest

This exceptional ammonite fossil is ideal for collectors, educators, or anyone fascinated by the diversity and evolutionary history of ancient marine life.

(Actual as seen)

Only 1 left in stock

SKU: UF3781 Category:

Description

Presenting a VERY RARE and scientifically valuable fossil heteromorph ammonite: Scaphites nodosus, from the Fox Hills Formation, part of the Pierre Shale Group, collected in South Dakota, USA. This specimen is a striking example of a heteromorph ammonite with its distinctive coiled-to-uncoiled shell morphology, emblematic of ammonite evolutionary experimentation during the Late Cretaceous.

Scaphites nodosus belongs to the family Scaphitidae, superfamily Scaphitoidea, and order Ammonitida. This species is noted for its characteristic compressed shell with a partially uncoiled body chamber, and prominent tubercles or nodes along the ribs—traits that have fascinated paleontologists for decades.

Geological & Scientific Details:

  • Scientific Name: Scaphites nodosus
  • Fossil Type: Heteromorph Ammonite
  • Geological Period: Cretaceous
  • Stage: Maastrichtian (approx. 72–66 million years ago)
  • Formation: Fox Hills Formation (Pierre Shale Group)
  • Location Found: South Dakota, United States
  • Order: Ammonitida
  • Superfamily: Scaphitoidea
  • Family: Scaphitidae
  • Morphological Features: Strongly ribbed, tuberculate shell with an initial tightly coiled inner whorl followed by a straight to recurved outer body chamber
  • Depositional Environment: Shallow marine setting along the margins of the Western Interior Seaway

Scaphites nodosus is widely used in biostratigraphy for the Maastrichtian stage due to its well-defined stratigraphic range and unique morphology. Its shell design and ornamentation make it a standout species among Cretaceous heteromorph ammonites.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

Please Note:

  • Scale Rule Squares / Cube = 1cm – full sizing is shown in the photo
  • The fossil pictured is the exact specimen you will receive, carefully selected for quality, preservation, and scientific interest

This exceptional ammonite fossil is ideal for collectors, educators, or anyone fascinated by the diversity and evolutionary history of ancient marine life.

Additional information

Era

Cretaceous
Origin

USA

Cretaceous Information

The Cretaceous Period (145–66 million years ago) was the final era of the Mesozoic, marked by the dominance of dinosaurs and the rise of flowering plants. It had a warm, greenhouse climate, with high sea levels that created vast shallow inland seas. Marine life flourished, including mosasaurs, ammonites, and rudist reefs, while the land was ruled by iconic dinosaurs like Tyrannosaurus rex, Triceratops, and Spinosaurus. Mammals and birds diversified, and insects thrived. The period ended with the mass extinction event, likely caused by an asteroid impact, wiping out the dinosaurs and paving the way for the rise of mammals in the Cenozoic.

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