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 Hymeneliales S. Stenroos, Miądl. & Lutzoni (2014) [monotypic] Family Hymeneliaceae Körb. (1855) Genus Ionaspis Th.Fr. (1871)