Gen. Fung. (Minneapolis): 174 (1909).

Basionym: Acanthothecium pachygraphoides Vain., Acta Soc. Fauna Flora Fenn. 7, (no. 2): 94 (1890). But fide Singh & Sinha (2010: 66: Vainio, Lichenes Brasilienses Exsiccate 876 (1892). Lectotype Brazil, Minas Gerais, Sitio, E. A. Vainio (TUR-V 270231).

Type locality: Brazil, Minas Gerais, Sitio, E. A. Vainio (TUR-V 270231).