These are two unusual trilobites.  Like other trilobites, the creature is made up of three different parts, the cephalon (head), the thorax (body), and the pygidium (tail).  The creature was protected by a hard calcite shell and this is what remains fossilized to this day.  This shell would not grow with the creature so the shell was molted away several times during the creature’s lifetime.  Thus one trilobite may have left several fossils during its lifetime.  The trilobite is the first creature known to have eyes, some believe that the trilobite had 360-degree vision.  The phacops specimens have truly amazing eyes.  These eyes are called schizochroal or aggregate eyes.  The calcite lenses are sometimes preserved.  Often the phacops has bumps preserved on the surface of the specimen.  The phacops lived between 345 million and 435 million years ago.  The paradoxides is one of the largest trilobites found.  These are often on a brown rock matrix.  These are considered a “primitive un-evolved” trilobite that are between 530 million years ago and 550 million years ago.  Like other fossils, the trilobites require a lot of work in cleaning and preparing the pieces for display.  May you enjoy your fossil, as it is a scientific find as well as a link to our distant past.  Fossils are to be treasured and preserved for future generations.

  • Dimensions: vertical mm x horizontal mm x width mm.
  • Genuine fossil.
  • This item includes an information card about the fossil.
  • A certificate of authenticity is included with this item.
  • This fossil requires special care - exposure to water and other chemicals, such as cleaning products or aerosols, will damage it over time. If you polish the fossil, use a dry cloth only, or an air duster that does not contain any disinfectant or other chemicals.

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