Basionym Name:Lecidea atrorufa var. squarrosa Ach., K. Vetensk-Acad. Nya Handl. 29: 267 (1808)
Homotypic synonyms:Lichen peltatus var. squarrosa (Ach.) Lam., Encycl. Méth. Bot., Suppl. (Paris) 3(2): 390 (1813)Syncomista squarrosa (Ach.) Nieuwl., Am. Midl. Nat. 4: 386 (1916)Toninia squarrosa (Ach.) Th. Fr., Lich. Scand. (Upsaliae)(2): 331 (1874)Toninia squarrosa f. squarrosa (Ach.) Th. Fr., Lich. Scand. (Upsaliae)(2): 331 (1874)Toninia squarrosa subsp. squarrosa (Ach.) Th. Fr., Lich. Scand. (Upsaliae)(2): 331 (1874)Toninia squarrosa var. squarrosa (Ach.) Th. Fr., Lich. Scand. (Upsaliae)(2): 331 (1874)