Trilobita - Phacopida - Encrinuridae

Alternative combinations: Encrinuroides neuter, Prophysemataspis neuter

Full reference: W. R. Evitt and R. P. Tripp. 1977. Silicified Middle Ordovician trilobites from the families Encrinuridae and Staurocephalidae. Palaeontographica Abteilung A 157:109-174

Belongs to Erratencrinurus according to D. K. Moss and S. R. Westrop 2014

See also Edgecombe and Chatterton 1990, Edgecombe et al. 1998 and Evitt and Tripp 1977

Sister taxa: Erratencrinurus (Celtencrinurus), Erratencrinurus (Erratencrinurus), Erratencrinurus capricornu, Erratencrinurus lapworthi, Erratencrinurus spicatus, Erratencrinurus trippi, Erratencrinurus uncatus, Erratencrinurus vigilans

Type specimen: USNM 217564, a cephalon/head (cranidium). Its type locality is Loc. 10, Greenmount Church area, which is in a Chatfieldian carbonate shale in the Martinsburg Formation of Virginia.

Distribution: found only at Loc. 10, Greenmount Church area

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Specimen images are retrieved through the ePANDDA API.