in Knudsen, Lendemer & Harris, Opuscula Philolichenum 9: 57 (2011).
Type: U.S.A. Arkansas. Izard Co.: NE corner of Devil's Knob-Devil's Backbone Natural Area, 36°00'22"N, 92°02'48"W, sandstone and dolomite outcrops, 24.x.2001, on dolomite, R.C. Harris 45400-D (NY! holotype).
Type locality: USA, Arkansas, Izard County, NE corner of Devil's Knob-Devil's Backbone Natural Area, sandstone and dolomite outcrops, on dolomite, 24 October 2001, R. C. Harris 45400-D (NY - holotype).
Type locality coordinates: 36°00'22"N, 92°02'48"W.