Description
Exceptional Elrathia kingi Trilobite in Matrix – Wheeler Shale, Middle Cambrian
This superb Elrathia kingi trilobite preserved in its natural shale matrix comes from the world-famous Wheeler Shale, located in the House Range, Antelope Springs, Millard County, Utah, USA. Known worldwide as one of the most iconic trilobites, Elrathia kingi is treasured for its elegant form, scientific importance, and exceptional preservation within this celebrated Cambrian formation. The fossil in this listing is a carefully selected, genuine specimen, with photographs showing the exact piece you will receive. Every fossil we supply is 100% authentic and includes a Certificate of Authenticity.
Geological Background – Wheeler Shale, Middle Cambrian
The Wheeler Shale Formation, deposited around 507 million years ago, represents one of the most important Middle Cambrian fossil-bearing units in North America. Formed in a deep, tranquil marine basin, the Wheeler Shale accumulated layer upon layer of ultrafine muds in a low-oxygen environment. These unique conditions inhibited decay and scavenging, creating an exceptional setting for the preservation of trilobites and rare soft-bodied organisms.
The formation records a time shortly after the Cambrian Explosion, when marine ecosystems were flourishing with unprecedented diversity. Fossils from this locality offer invaluable insights into early arthropod evolution, seabed ecology, and sedimentary processes within ancient oceans.
Species Overview – Elrathia kingi (Order Ptychopariida)
Elrathia kingi is one of the most recognisable trilobites of the Cambrian Period and serves as a key reference species for palaeontologists studying the evolution and morphology of early arthropods. Belonging to the order Ptychopariida, this trilobite is admired for its clean symmetry, consistent morphology, and its ability to preserve beautifully within fine-grained shale.
Defining characteristics often visible on well-preserved specimens include:
- Rounded cephalon with a clearly defined glabella
- Fourteen rib-like thoracic segments, evenly spaced and gracefully arched
- Tapering pygidium with smooth axial definition
- Low-relief exoskeleton, ideal for detailed preservation
- Streamlined, balanced silhouette, making it instantly recognisable
Specimens in matrix, such as this one, provide additional scientific and visual value by presenting the trilobite exactly as it was naturally deposited and preserved within the shale. This context enhances display quality and allows appreciation of the fossil’s geological origins.
Locality Significance – House Range, Antelope Springs
The House Range of western Utah is among the most important Cambrian fossil localities in the world. Antelope Springs, in particular, has produced countless academically significant specimens and continues to be a destination for researchers and collectors alike. The shale layers here split cleanly to reveal trilobites preserved with remarkable clarity, often appearing as if they were frozen in time.
This region has been central to numerous palaeontological studies, offering essential information about Cambrian marine life, depositional environments, and biodiversity during one of Earth’s most transformative eras. Fossils from Antelope Springs remain highly sought-after for their combination of scientific relevance and aesthetic appeal.
Your Genuine Fossil Specimen
- Species: Elrathia kingi
- Formation: Wheeler Shale
- Age: Middle Cambrian
- Locality: House Range, Antelope Springs, Millard County, Utah, USA
- Authenticity: 100% genuine fossil with Certificate of Authenticity
- Condition: Well-defined trilobite preserved naturally in matrix
- Sizing: Full dimensions shown in the listing photographs
- Actual Specimen: You will receive the exact fossil pictured
This Elrathia kingi in matrix makes an exceptional addition to any fossil collection, display cabinet, educational setting, or gift for natural history enthusiasts. Its timeless form and deep geological significance make it one of the most rewarding Cambrian fossils to own.
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