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VERY RARE Fossil Heteromorph Ammonite DISCOSCAPHITES GULOSUS – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA
VERY RARE Fossil Heteromorph Ammonite DISCOSCAPHITES GULOSUS – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA - Image 2
VERY RARE Fossil Heteromorph Ammonite DISCOSCAPHITES GULOSUS – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA - Image 3
VERY RARE Fossil Heteromorph Ammonite DISCOSCAPHITES GULOSUS – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA - Image 4
VERY RARE Fossil Heteromorph Ammonite DISCOSCAPHITES GULOSUS – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA - Image 5

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

£180.00

This listing features a VERY RARE and scientifically notable fossil of the heteromorph ammonite Discoscaphites gulosus, a unique marine cephalopod from the Maastrichtian stage of the Late Cretaceous. This authentic and expertly prepared specimen comes from the Fox Hills Formation, part of the Pierre Shale Group, discovered in South Dakota, USA — a region internationally recognised for preserving marine ecosystems from the closing chapter of the Mesozoic Era.

Discoscaphites gulosus is a member of the family Scaphitidae, within the superfamily Scaphitoidea and order Ammonitida. Its shell features a distinct heteromorph shape, beginning with a coiled early section followed by a more loosely curved final whorl. This morphology suggests adaptations for specialized locomotion or environmental niches in the retreating Western Interior Seaway.

Geological & Scientific Details:

  • Scientific Name: Discoscaphites gulosus
  • Fossil Type: Heteromorph Ammonite (Extinct Marine Cephalopod)
  • Geological Period: Cretaceous
  • Stage: Maastrichtian (approx. 72–66 million years ago)
  • Formation: Fox Hills Formation (part of the Pierre Shale Group)
  • Location Found: South Dakota, United States
  • Order: Ammonitida
  • Superfamily: Scaphitoidea
  • Family: Scaphitidae
  • Morphological Features: Moderately uncoiled shell, strong ribbing, narrow aperture, terminal whorl with slight curvature
  • Depositional Environment: Shallow marine and estuarine deltaic settings of the Western Interior Seaway

This genus is especially significant due to its appearance near the K–Pg boundary, with Discoscaphites gulosus sometimes found in strata slightly above the extinction horizon, making it a key subject of interest in studies on ammonite survival and extinction dynamics.

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 you see is the exact specimen you will receive, selected for its quality, authenticity, and scientific interest

This specimen is an outstanding collector’s piece and an exceptional opportunity to own a tangible piece of Cretaceous marine life — the perfect addition for collectors, educators, or palaeontology enthusiasts.

(Actual as seen)

Only 1 left in stock

SKU: UF3777 Category:

Description

This listing features a VERY RARE and scientifically notable fossil of the heteromorph ammonite Discoscaphites gulosus, a unique marine cephalopod from the Maastrichtian stage of the Late Cretaceous. This authentic and expertly prepared specimen comes from the Fox Hills Formation, part of the Pierre Shale Group, discovered in South Dakota, USA — a region internationally recognised for preserving marine ecosystems from the closing chapter of the Mesozoic Era.

Discoscaphites gulosus is a member of the family Scaphitidae, within the superfamily Scaphitoidea and order Ammonitida. Its shell features a distinct heteromorph shape, beginning with a coiled early section followed by a more loosely curved final whorl. This morphology suggests adaptations for specialized locomotion or environmental niches in the retreating Western Interior Seaway.

Geological & Scientific Details:

  • Scientific Name: Discoscaphites gulosus
  • Fossil Type: Heteromorph Ammonite (Extinct Marine Cephalopod)
  • Geological Period: Cretaceous
  • Stage: Maastrichtian (approx. 72–66 million years ago)
  • Formation: Fox Hills Formation (part of the Pierre Shale Group)
  • Location Found: South Dakota, United States
  • Order: Ammonitida
  • Superfamily: Scaphitoidea
  • Family: Scaphitidae
  • Morphological Features: Moderately uncoiled shell, strong ribbing, narrow aperture, terminal whorl with slight curvature
  • Depositional Environment: Shallow marine and estuarine deltaic settings of the Western Interior Seaway

This genus is especially significant due to its appearance near the K–Pg boundary, with Discoscaphites gulosus sometimes found in strata slightly above the extinction horizon, making it a key subject of interest in studies on ammonite survival and extinction dynamics.

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 you see is the exact specimen you will receive, selected for its quality, authenticity, and scientific interest

This specimen is an outstanding collector’s piece and an exceptional opportunity to own a tangible piece of Cretaceous marine life — the perfect addition for collectors, educators, or palaeontology enthusiasts.

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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