Full reference: G. A. Cooper. 1957. Permian brachiopods from central Oregon. Smithsonian Miscellaneous Contributions 134(12):1-79
Type specimen: USNM 125371. Its type locality is UO 2202-3, "Triangulation Hill", Grindstone-Twelvemile Creek area, which is in a Kungurian marine limestone/sandstone in the Coyote Butte Formation of Oregon.
Ecology: stationary low-level epifaunal suspension feeder
Average measurements (in mm): valve 22.1 x 20.3