Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Pezizomycotina O.E. Erikss. & Winka (1997) Class Laboulbeniomycetes Engl. (1897) Order Pyxidiophorales P.F. Cannon (2001) Family Pyxidiophoraceae Arnold (1971) 1 Genus Mycorhynchidium Malloch & Cain (1971) 2 Genus Pyxidiophora Bref. & Tavel (1891)