Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Pezizomycotina O.E. Erikss. & Winka (1997) Class Dothideomycetes O.E. Erikss. & Winka (1997) Family Microthyriaceae Sacc. (1883) Genus Pachythyrium G. Arnaud ex Spooner & P.M.Kirk (1990)