Op. Bot. 127: 72 (1996).

Protolog: A simili Bacidia polychroa differt thallo granuloso, apotheciis altioribus (proportione altitudinis hymenii cum ea apothecii minori), apicibus paraphysorum angustioribus.

Protolog type data: Type: Canada, Nova Scotia, Queens Co., Kejimkujik Nat. Park, E side of Kejimkujik Lake, c. 700 m SE of the N end of Peter Point, on Fagus grandifolia, alt. c. 100 m, 1989, Ekman L 1050 (LD, holotype; CANL, isotype).

Type locality: Canada, Nova Scotia, Queens County, Kejimkujik Nat. Park, E side of Kejimkujik Lake, ca. 700 m SE of the N end of Peter Point, on Fagus grandifolia, ca. 100 m, 1989, S. Ekman L 1050 (LD - holotype; CANL - isotype).

Type locality coordinates: 44°22'13"N, 65°13'49"W; 44.370278, -65.230278.