Mcadams, N.E.B. & Adrain, J.M. (2011) Revision of the Lower Ordovician (lower Floian; Tulean) pliomerid trilobite Protopliomerella, with new species from the Great Basin, western USA. Zootaxa, 3144 (1), 1–113.
https://doi.org/10.11646/zootaxa.3144.1.1