Phacops rana Trilobite cast replica.
The original fossil from which it was molded was a clean and crisp specimen
Phacops rana is a species of trilobite from the middle Devonian period. Their fossils are found chiefly in the northeastern United States, southwestern Ontario, and in Morocco.
Trilobite means three lobes, and their exoskeletons are divided into-you guessed it!-three parts lengthwise. The middle (axial) lobe protected the digestive system while the outer (pleural) lobes are where the legs attached.
This specimen shows that these animals are also divided into three major sections, starting with the head (cephalon) then the accordion-looking thorax, pygidium bringing up the rear.
This now-extinct group of marine arthropods roamed the oceans for years. Simple but successful.
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