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Check the listing for details. RARE SWATARA CRYPTOLITHUS TRILOBITE WITH TWO LONG GENAL SPINES - FOUND IN 1980's. Listed at 149.99 USD. This is a very cool Trinucleid fossil. It is a colorful Cryptolithus bellulus trilobite from the classic site at Swatara Gap, Pennsylvania. This type of trilobite is known for the unusual pitted fringe that encircles the entire front of the trilobite.