Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Pezizomycotina O.E. Erikss. & Winka (1997) Class Lecanoromycetes O.E. Erikss. & Winka (1997) Subclass Ostropomycetidae V. Reeb, Lutzoni & Cl.Roux (2004) Order Ostropales Nannf. (1932) Family Graphidaceae Dumort. (1822) Genus Cruentotrema Rivas Plata, Papong, Lumbsch & Lücking (2012)