Encrinurus is a long-lived genus of phacopid trilobites that lived in what are now Africa, Asia, Australia, Europe, North America, and South America from the middle Ordovician to the early Devonian from 472 to 412.3 mya, existing for approximately .
Taxonomy
Encrinurus was named by Emmrich in 1844. Jell and Adrain (2003) list it as a currently valid genus name within the Phacopida, specifically within the Encrinuridae.
References
Further reading
Fossils (Smithsonian Handbooks) by David Ward
Trilobites by Riccardo Levi-Setti
Invertebrate Palaeontology and Evolution by E.N.K. Clarkson
Trilobites: Common Trilobites of North America (A NatureGuide book) by Jasper Burns