Ogyginus corndensis Trilobite Impression – Llanvirn, Ordovician – Gilwern Quarry, Wales – Genuine UK Fossil

Description Authentic Ogyginus corndensis Trilobite Impression – Ordovician, Llanvirn Series – Upper Gilwern Quarry, Wales, UK This listing features a well-preserved impression fossil of the trilobite species Ogyginus corndensis from the Upper Gilwern Quarry in Wales. Dating to the Llanvirn Series of the Middle Ordovician Period (approx. 460–465 million years ago), this is a striking and scientifically important example of early marine arthropod life in what was then a shallow epicontinental sea environment. Scientific & Geological Information: Species: Ogyginus corndensis Family: Asaphidae Superfamily: Asaphoidea Order: Asaphida Geological Period: Middle Ordovician Series: Llanvirn Series Location: Upper Gilwern Quarry, Wales, UK Depositional Environment: Shallow marine shelf with low oxygen conditions, promoting fine preservation of benthic organisms Fossil Zone: Typically associated with the Didymograptus murchisoni Biozone, a key graptolite zone used for correlation Notable Identification: Ogyginus corndensis has been formally described in historical British palaeontology literature and is considered an index fossil for its strata. Morphology Features: Broad, smooth cephalon (head) with indistinct glabella Thorax with ~8–9 wide pleurae (segments) Pygidium (tail) is relatively large and semi-circular This specimen is a fossil impression, meaning it shows the outline and surface texture of the trilobite as a negative mould rather than the full-bodied fossil. Specimen Details: Discovered by: Alister and Alison of our UKGE team Date of Discovery: 27 March 2024 Cleaned & Prepped by: Alison Photographs: What you see is exactly what you will receive – carefully selected for quality and visual clarity Size Reference: Includes 1cm scale cube in photographs – please refer to images for accurate sizing Certification: Comes with a Certificate of Authenticity – all our fossils are 100% genuine specimens, responsibly sourced and expertly prepared. Why This Fossil? Ogyginus corndensis is a hallmark trilobite of British Ordovician strata, prized for its completeness, clarity, and paleontological importance. This specimen offers a beautiful glimpse into prehistoric marine ecosystems and is ideal for collectors, educational use, and display. Add a true piece of Earth’s deep history to your collection today.