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RARE Calymene celebra Trilobite Fossil | Silurian | Niagaran Limestone | Joliet Formation | Illinois USA | Genuine with COA

RARE Calymene celebra Trilobite Fossil | Silurian | Niagaran Limestone | Joliet Formation | Illinois USA | Genuine with COA

USD $84.19

Up for sale is a RARE and authentic Calymene celebra trilobite fossil, a classic species from the Niagaran Limestone of the Joliet Formation, found near Grafton, Illinois, USA. This remarkable trilobite dates back to the Silurian Period, approximately 430 million years ago, and is a prized fossil for both collectors and educators.

As with all our listings, this is a 100% genuine fossil and comes with a Certificate of Authenticity. The photo shows the exact specimen you will receive. The cube in the image equals 1cm. Please refer to the photo for full dimensions.

Geological & Taxonomic Information:

  • Fossil Type: Trilobite (extinct marine arthropod)
  • Species: Calymene celebra
  • Family: Calymenidae
  • Order: Phacopida
  • Class: Trilobita
  • Geological Formation: Joliet Formation (Niagaran Limestone Group)
  • Geological Period: Silurian (approx. 430 million years ago)
  • Location: Grafton, Illinois, USA
  • Depositional Environment: Warm, shallow marine reef and lagoonal settings typical of the Silurian Midwestern carbonate platforms

Morphological Features:

  • Distinctive compact and enrolled body posture, often preserved curled as a defense mechanism
  • Well-defined glabella (head region) and segmented thorax
  • Characteristic surface texture and segment articulation of Calymene celebra
  • Fossil is preserved in matrix with good surface relief and natural contrast

Scientific Significance: Calymene celebra is the state fossil of Wisconsin and one of the most iconic North American trilobites. Known for its well-preserved, easily recognizable form and abundance in Silurian carbonate rocks, it provides key insights into early arthropod morphology and Silurian reef ecosystems.

Collector & Display Value:

  • A highly sought-after trilobite from a classic American locality
  • Great educational specimen for teaching about Paleozoic marine life
  • Excellent condition with characteristic features well preserved

Why Buy from Us?

  • Every specimen is 100% authentic and responsibly sourced
  • Comes with a Certificate of Authenticity
  • Professionally selected, photographed, and prepared

Add a rare and historically significant Calymene celebra trilobite fossil to your collection—an exceptional example of Silurian life from the heart of ancient America.

(Actual as seen)

Only 1 left in stock

SKU: UF3566 Category:

Description

Up for sale is a RARE and authentic Calymene celebra trilobite fossil, a classic species from the Niagaran Limestone of the Joliet Formation, found near Grafton, Illinois, USA. This remarkable trilobite dates back to the Silurian Period, approximately 430 million years ago, and is a prized fossil for both collectors and educators.

As with all our listings, this is a 100% genuine fossil and comes with a Certificate of Authenticity. The photo shows the exact specimen you will receive. The cube in the image equals 1cm. Please refer to the photo for full dimensions.

Geological & Taxonomic Information:

  • Fossil Type: Trilobite (extinct marine arthropod)
  • Species: Calymene celebra
  • Family: Calymenidae
  • Order: Phacopida
  • Class: Trilobita
  • Geological Formation: Joliet Formation (Niagaran Limestone Group)
  • Geological Period: Silurian (approx. 430 million years ago)
  • Location: Grafton, Illinois, USA
  • Depositional Environment: Warm, shallow marine reef and lagoonal settings typical of the Silurian Midwestern carbonate platforms

Morphological Features:

  • Distinctive compact and enrolled body posture, often preserved curled as a defense mechanism
  • Well-defined glabella (head region) and segmented thorax
  • Characteristic surface texture and segment articulation of Calymene celebra
  • Fossil is preserved in matrix with good surface relief and natural contrast

Scientific Significance: Calymene celebra is the state fossil of Wisconsin and one of the most iconic North American trilobites. Known for its well-preserved, easily recognizable form and abundance in Silurian carbonate rocks, it provides key insights into early arthropod morphology and Silurian reef ecosystems.

Collector & Display Value:

  • A highly sought-after trilobite from a classic American locality
  • Great educational specimen for teaching about Paleozoic marine life
  • Excellent condition with characteristic features well preserved

Why Buy from Us?

  • Every specimen is 100% authentic and responsibly sourced
  • Comes with a Certificate of Authenticity
  • Professionally selected, photographed, and prepared

Add a rare and historically significant Calymene celebra trilobite fossil to your collection—an exceptional example of Silurian life from the heart of ancient America.

Additional information

Era

Silurian
Origin

USA

Silurian Information

The Silurian Period (443–419 million years ago) was a time of climate stabilization following the end-Ordovician mass extinction. The climate became warmer, and sea levels rose, leading to the expansion of shallow marine ecosystems. Coral reefs flourished, and new marine predators like Eurypterids (sea scorpions) and early jawed fish emerged. One of the most significant events was the colonization of land—early vascular plants such as Cooksonia appeared, along with the first arthropods to venture onto land. These evolutionary advances set the stage for the more complex terrestrial ecosystems that developed in the Devonian.

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