Description
This listing features a Diacalymene ouzregui trilobite fossil, dating back to the Ashgill stage of the Ordovician period (~445 million years ago). This exceptionally preserved trilobite was discovered in Erfoud, Morocco, an area renowned for its rich Ordovician fossil deposits.
Diacalymene belongs to the Calymenidae family, which is characterised by its distinctively arched cephalon (head), well-defined thoracic segments, and semi-rolled defensive posture, a common trilobite survival adaptation. This is a beautifully detailed specimen with excellent preservation of its exoskeleton.
Fossil Information:
- Species: Diacalymene ouzregui
- Fossil Type: Trilobite
- Geological Period: Ordovician (~445 million years ago)
- Stage: Ashgill
- Location: Erfoud, Morocco
- Size: See scale reference in photos
- Preservation: Well-defined cephalon, thoracic segments, and pygidium
Key Features:
✔ Authentic and high-quality Ordovician trilobite fossil
✔ Distinctively arched body and well-preserved segments
✔ Ideal for collectors, educators, and researchers
Authenticity & Certification:
All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity. The specimen shown in the photos is the exact one you will receive.
Scientific & Historical Significance:
Trilobites were one of the most successful arthropod groups in Earth’s history, thriving in marine environments for over 270 million years. Diacalymene ouzregy was a highly adaptable species, displaying the characteristic rolling behaviour for protection, similar to modern-day pill bugs. Their fossilised remains provide valuable insight into Ordovician marine ecosystems and evolutionary history.
Why Buy From Us?
This fossil is part of the Alice Purnell Collection, one of the largest and most prestigious fossil collections in the world. We specialise in high-quality, scientifically significant fossils, ensuring each specimen is carefully selected for display, research, and educational purposes.
Own a rare and beautifully preserved Diacalymene ouzregui trilobite fossil from Morocco’s world-renowned Ordovician deposits—an exceptional piece for any collection!







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