Basionym Name:Arthonia obscurata Vain., Acta Soc. Fauna Flora fenn. 7(no. 2): 157 (1890)
Homotypic synonyms:Arthonia obscuratula Zahlbr., Cat. Lich. Univers. 2: 71 (1922)Arthonia stenographella subsp. obscurata (Vain.) Vain., Bot. Tidsskr. 29: 140 (1909)