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Crepicephalus is an extinct genus of trilobites from the Late Cambrian of North America. It belongs to the broader group of ptychopariid trilobites and is the name-bearing genus of the Crepicephalus Biozone, a biostratigraphic interval used to correlate Cambrian rock layers. Its fossils are therefor...
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Middle Cambrian trilobite from Bohemia that serves as the type genus of order Ptychopariida, one of the most taxonomically diverse trilobite groups.
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Cambrian trilobite from Siberia used as an index fossil for the Botomian Stage, aiding global correlation of Lower Cambrian strata across continents.
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A Cambrian ptychopariid trilobite described by Barrande in 1846, Agraulos is known primarily from Middle Cambrian deposits in Bohemia.
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