Basionym Name:Arthonia obtusangula Dufour, J. Phys. Chim. Hist. nat. Arts 87: 207 (1818)
Homotypic synonyms:Phaeographis dendritica f. obtusangula (Dufour) Hue, Bull. Soc. bot. Fr., Mém. 12: 16 (1908)