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RARE Fossil Triassic Ammonite INYOITES OWENI Thaynes Limestone Elko Nevada USA Authentic Specimen

RARE Fossil Triassic Ammonite INYOITES OWENI Thaynes Limestone Elko Nevada USA Authentic Specimen

£18.00

This listing features a RARE and authentic ammonite fossil of Inyoites oweni, a ceratitid ammonoid from the Thaynes Limestone Formation, collected in Elko County, Nevada, USA. This scientifically significant specimen is from the Lower Triassic period, and is provided with a Certificate of Authenticity.

Inyoites oweni is classified as follows:

  • Order: Ceratitida
  • Superfamily: Inyoitoidea
  • Family: Inyoitidae

It dates to the Olenekian Stage of the Lower Triassic, approximately 247–251 million years ago, shortly after the Permian-Triassic mass extinction—the most severe biodiversity loss event in Earth’s history. Ammonoids such as Inyoites were among the early marine life to repopulate Triassic oceans.

The Thaynes Limestone Formation represents a shallow marine depositional environment characterized by carbonate mudstones, limestones, and occasional interbedded shales. This setting supported a thriving marine ecosystem including ammonoids, bivalves, gastropods, and marine reptiles.

Morphological Features:

  • Evolute, discoidal shell with widely spaced whorls
  • Prominent ribbing along the flanks
  • A relatively large umbilicus
  • Ceratitic suture lines, less complex than later Mesozoic ammonites

These features distinguish Inyoites oweni from other Early Triassic ammonoids and make it an important fossil for biostratigraphic correlation and evolutionary studies.

The specimen in this listing is the exact one shown in the photographs. Scale rule cubes/squares = 1cm. Full sizing details can be found in the images.

Specimen Overview:

  • Species: Inyoites oweni
  • Fossil Type: Ammonoid Shell
  • Formation: Thaynes Limestone
  • Age: Lower Triassic (Olenekian Stage)
  • Location: Elko County, Nevada, USA
  • Preservation: Natural limestone matrix with detailed shell impression

This Inyoites fossil is a rare post-extinction survivor species, ideal for collectors of Triassic marine life, evolutionary paleontology enthusiasts, or educators seeking genuine examples of early Mesozoic fauna.

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

(Actual as seen)

Out of stock

SKU: SF0293 Category:

Description

This listing features a RARE and authentic ammonite fossil of Inyoites oweni, a ceratitid ammonoid from the Thaynes Limestone Formation, collected in Elko County, Nevada, USA. This scientifically significant specimen is from the Lower Triassic period, and is provided with a Certificate of Authenticity.

Inyoites oweni is classified as follows:

  • Order: Ceratitida
  • Superfamily: Inyoitoidea
  • Family: Inyoitidae

It dates to the Olenekian Stage of the Lower Triassic, approximately 247–251 million years ago, shortly after the Permian-Triassic mass extinction—the most severe biodiversity loss event in Earth’s history. Ammonoids such as Inyoites were among the early marine life to repopulate Triassic oceans.

The Thaynes Limestone Formation represents a shallow marine depositional environment characterized by carbonate mudstones, limestones, and occasional interbedded shales. This setting supported a thriving marine ecosystem including ammonoids, bivalves, gastropods, and marine reptiles.

Morphological Features:

  • Evolute, discoidal shell with widely spaced whorls
  • Prominent ribbing along the flanks
  • A relatively large umbilicus
  • Ceratitic suture lines, less complex than later Mesozoic ammonites

These features distinguish Inyoites oweni from other Early Triassic ammonoids and make it an important fossil for biostratigraphic correlation and evolutionary studies.

The specimen in this listing is the exact one shown in the photographs. Scale rule cubes/squares = 1cm. Full sizing details can be found in the images.

Specimen Overview:

  • Species: Inyoites oweni
  • Fossil Type: Ammonoid Shell
  • Formation: Thaynes Limestone
  • Age: Lower Triassic (Olenekian Stage)
  • Location: Elko County, Nevada, USA
  • Preservation: Natural limestone matrix with detailed shell impression

This Inyoites fossil is a rare post-extinction survivor species, ideal for collectors of Triassic marine life, evolutionary paleontology enthusiasts, or educators seeking genuine examples of early Mesozoic fauna.

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

Additional information

Era

Triassic
Origin

USA

Triassic Information

The Triassic Period (252–201 million years ago) marked the beginning of the Mesozoic Era, following the Permian-Triassic mass extinction, the most severe extinction event in Earth's history. The climate was hot and dry, with vast deserts and little polar ice. Life slowly recovered, leading to the rise of the first dinosaurs, pterosaurs (flying reptiles), and early mammals. Reptiles, including large archosaurs (ancestors of crocodiles and dinosaurs), dominated both land and sea. In the oceans, ichthyosaurs and plesiosaurs thrived alongside ammonites and early coral reefs. The first true conifers and ginkgo trees spread across the land. The period ended with another mass extinction, paving the way for the Jurassic and the golden age of dinosaurs.

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