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Cryptolithus
Extinct genus of trilobites / From Wikipedia, the free encyclopedia
Not to be confused with Cryptolithodes.
Cryptolithus is a genus of extinct epifaunal, suspension-feeding, trinucleid trilobites that lived during the Ordovician period.[2] They were mostly blind.[3] They are found in the United States, Canada, Venezuela, the United Kingdom, France, the Czech Republic, Morocco and Turkey.[4]