Basionym Name:Nephroma sipeanum Gyeln., Annals Cryptog. Exot. 4(3-4): 147 (1931)
Homotypic synonyms:Nephroma helveticum subsp. sipeanum (Gyeln.) Goward & Ahti, in Ahti, Brodo & Noble, Mycotaxon 28(1): 94 (1987)Nephroma helveticum var. sipeanum (Gyeln.) Wetmore, Publ. Mus. Michigan State Univ., Biol. Ser. 1(no. 11): 431 (1960)