Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Pezizomycotina O.E. Erikss. & Winka (1997) Class Eurotiomycetes O.E. Erikss. & Winka (1997) Subclass Chaetothyriomycetidae Doweld (2001) Order Pyrenulales Fink ex D.Hawksw. & O.E. Erikss. (1986) Family Pyrenulaceae Rabenh. (1870) Genus Mazaediothecium Aptroot (1991)