Basionym Name:Graphis caesiohians Nyl. ex Hue, [as 'caesio-hians'] Nouv. Arch. Mus. Hist. Nat., Paris, 3 sér. 3: 166 (1891)
Homotypic synonyms:Phaeographina caesiohians (Nyl.) Redinger, Rev. Bryol. Lichénol. 9: 100 (1936)Phaeographis caesiohians (Nyl.) Luch & Lücking, Willdenowia 48(3): 421 (2018)