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Encrinurus is an extinct genus of trilobite belonging to the order Phacopida that lived during the Silurian period. Fossils of this marine arthropod are widely distributed across sedimentary deposits in North America and Europe. It is easily recognized by its heavily tuberculate exoskeleton and a di...
A Silurian encrinurid trilobite best known from China, where C. rex serves as a significant index fossil for Silurian biostratigraphic correlation in East Asia.
Hystricurus is a Late Cambrian trilobite genus described by Raymond in 1924, known from North America and characterized by its spiny exoskeleton.
A Late Ordovician trilobite from North America and Europe, Symphysops is notable for its fused eyes forming a single continuous bar across the cephalon.
