Basionym Name:Verrucaria caesia Nyl., Bot. Notiser(10-11): 162 (1853)
Homotypic synonyms:Arthopyrenia caesia (Nyl.) Zahlbr., Cat. Lich. Univers. 1: 320 (1921)Collemopsidium caesium (Nyl.) Coppins & Aptroot, Lichenologist 40(5): 368 (2008)Leiophloea caesia (Nyl.) Zahlbr., Cat. Lich. Univers. 1: 320 (1921)Pseudarthopyrenia caesia (Nyl.) Keissl., Rev. Bryol. Lichénol. 8: 33 (1935)Pyrenocollema caesium (Nyl.) R.C. Harris, in Egan, Bryologist 90(2): 164 (1987)Thelidium caesium (Nyl.) Arnold, Flora, Regensburg 53(30-31): 484 (1871)