Bot. Not. 1947: 44 (1947).

Type locality: USA, New Hampshire, White Mountains, on Acer saccharinum, s.d., E. Tuckerman s.n. (S - lectotype; BG, DUKE, FH, L, UPS, US - isolectotypes; Reliq. Tuck. 88 as R. sophodes - isoparatypes). Designated by Sheard (2010: 192).

Thallus: very thin and partially within substrate or surficial, thin, light grey to dark ... Data lacking.