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Welcome to BugsDirect Ltd. Leading Suppliers of Worldwide Entomology Specimens (Retail/Wholesale)

Trilobite Fossil | Elrathia kingi | Wheeler Shale, Utah | Middle Cambrian | 12–16mm

An iconic Cambrian trilobite, naturally preserved in its original Wheeler Shale matrix from one of the world's premier fossil localities.

Elrathia kingi is among the most recognisable trilobites in the fossil record — prized by collectors, researchers, and natural history institutions alike for its well-defined morphology, consistent preservation, and immediate visual impact. These specimens originate from the Wheeler Shale Formation, House Range, Antelope Springs, Millard County, Utah, USA, deposited approximately 507 million years ago during the Middle Cambrian.

Geological Background — Wheeler Shale

The Wheeler Shale represents a quiet, deep-marine environment in which fine sediments accumulated in thin, fissile layers. Low-oxygen conditions at the seabed prevented extensive decay and shielded fragile remains from scavengers, producing the extraordinary preservation for which this formation is celebrated. The Wheeler Shale is a cornerstone of Cambrian palaeontology, preserving trilobites, soft-bodied organisms, and rare arthropods with exceptional fidelity.

Species Overview — Elrathia kingi (Order Ptychopariida)

Belonging to the order Ptychopariida, Elrathia kingi is widely used in teaching and scientific contexts as a clear example of Cambrian trilobite anatomy. Key features include:

  • Rounded cephalon with a well-defined glabella
  • Fourteen evenly spaced, gently arched thoracic segments
  • Tapered pygidium mirroring the symmetry of the cephalon
  • Smooth, low-profile exoskeleton that captures fine morphological detail

Specimen Details:

  • Species: Elrathia kingi
  • Formation: Wheeler Shale
  • Age: Middle Cambrian (~507 million years ago)
  • Size: 12–16mm (approximate range)
  • Provenance: House Range, Antelope Springs, Millard County, Utah, USA
  • Condition: Naturally preserved in original matrix

Each specimen is hand-selected for quality and clarity. You will receive a specimen of comparable appearance to those shown — colour, matrix character, and preservation detail will vary as with any natural fossil.

Display & Collection:

A timeless piece for fossil collections, educational displays, and natural history exhibits. The compact size, scientific significance, and exceptional preservation make this an ideal specimen for both newcomers and seasoned collectors. Pairs beautifully with other Palaeozoic invertebrates or as a centrepiece in a Cambrian-themed cabinet.

£75.00 GBP

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