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RARE Gauthiericeras margae Ammonite Fossil | Coniacian Cretaceous | Wyoming USA | Genuine Specimen w/ COA

£120.00

This listing features a RARE fossil ammonite of the species Gauthiericeras margae, originating from the Coniacian stage of the Upper Cretaceous period, found in Wyoming, USA. Ammonites of this genus are seldom offered for sale, making this specimen a unique and collectible piece for fossil enthusiasts and paleontology collectors.

The exact specimen pictured is what you will receive. The image includes a 1cm scale cube to provide an accurate visual reference for size. This fossil is 100% genuine, carefully selected for its quality, and comes with a Certificate of Authenticity.

Geological & Scientific Details:

  • Species: Gauthiericeras margae
  • Type: Fossil Ammonite (extinct marine cephalopod)
  • Geological Period: Cretaceous
  • Stage: Coniacian (approx. 89.8 to 86.3 million years ago)
  • Location Found: Wyoming, United States
  • Order: Ammonitida
  • Superfamily: Acanthoceratoidea
  • Family: Collignoniceratidae (tentative)
  • Morphological Features: Gauthiericeras typically displays a compressed, evolute shell with strong ribbing and prominent tubercles, contributing to its striking appearance and diagnostic profile. This specimen shows distinct whorl definition and suture patterns.
  • Depositional Environment: Likely formed in a shallow marine epicontinental sea that covered parts of North America during the Late Cretaceous, promoting excellent fossilisation in calcareous sediment.

Noteworthy Attributes:

  • This ammonite is not commonly found in fossil markets, especially from North American localities.
  • Provides significant value both as a scientific reference specimen and a decorative collectible.

Why Choose Us?

  • Only genuine fossils, professionally sourced and vetted.
  • Comes with a Certificate of Authenticity.
  • You will receive the actual fossil shown in the listing.
  • Suitable for collectors, museums, educators, and fossil enthusiasts.

Enhance your collection with this rare Gauthiericeras margae ammonite fossil—a tangible relic of Earth’s distant past from the Cretaceous seas of Wyoming.

(Actual as seen)

Only 1 left in stock

SKU: UF3826 Category:

Description

This listing features a RARE fossil ammonite of the species Gauthiericeras margae, originating from the Coniacian stage of the Upper Cretaceous period, found in Wyoming, USA. Ammonites of this genus are seldom offered for sale, making this specimen a unique and collectible piece for fossil enthusiasts and paleontology collectors.

The exact specimen pictured is what you will receive. The image includes a 1cm scale cube to provide an accurate visual reference for size. This fossil is 100% genuine, carefully selected for its quality, and comes with a Certificate of Authenticity.

Geological & Scientific Details:

  • Species: Gauthiericeras margae
  • Type: Fossil Ammonite (extinct marine cephalopod)
  • Geological Period: Cretaceous
  • Stage: Coniacian (approx. 89.8 to 86.3 million years ago)
  • Location Found: Wyoming, United States
  • Order: Ammonitida
  • Superfamily: Acanthoceratoidea
  • Family: Collignoniceratidae (tentative)
  • Morphological Features: Gauthiericeras typically displays a compressed, evolute shell with strong ribbing and prominent tubercles, contributing to its striking appearance and diagnostic profile. This specimen shows distinct whorl definition and suture patterns.
  • Depositional Environment: Likely formed in a shallow marine epicontinental sea that covered parts of North America during the Late Cretaceous, promoting excellent fossilisation in calcareous sediment.

Noteworthy Attributes:

  • This ammonite is not commonly found in fossil markets, especially from North American localities.
  • Provides significant value both as a scientific reference specimen and a decorative collectible.

Why Choose Us?

  • Only genuine fossils, professionally sourced and vetted.
  • Comes with a Certificate of Authenticity.
  • You will receive the actual fossil shown in the listing.
  • Suitable for collectors, museums, educators, and fossil enthusiasts.

Enhance your collection with this rare Gauthiericeras margae ammonite fossil—a tangible relic of Earth’s distant past from the Cretaceous seas of Wyoming.

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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