Opuscula Philolichenum 6: 149 (2009).

Protolog: Bacidiae circumspectae valde similis sed excipulo epihymenioque cristalifero et conidiis brevioribus 4.5-5.5 x 1-1.2 µm differt.

Protolog type data: U.S.A. Vermont. Essex Co.: Town of Ferdinand, Wenlock Wildlife Management Area, near Moose Bog, 44°45'44"N, 71°44'09"W, flooded Thuja swamp and adjacent spruce-fir, on trunk of Thuja at edge of swamp, 18.v.2008, R. C. Harris 54577 (NY, holotype; isotypes distributed as Lendemer, Lichens of Eastern North America exs. no. 341).

Type locality: USA, Vermont, Essex County, Town of Ferdinand, Wenlock Wildlife Management Area, near Moose Bog, flooded Thuja swamp and adjacent spruce-fir, on trunk of Thuja at edge of swamp, 18.5.2008, R. C. Harris 54577 (NY - holotype; Lendemer: Lichens of Eastern North America Exs.: 341 - isotypes).

Type locality coordinates: 44°45'44"N, 71°44'09"W.