Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Leotiomycetes O.E. Erikss. & Winka (1997)
       Family Myxotrichaceae Currah (1985), incertae sedis
         1 Genus Byssoascus Arx (1971)
         2 Genus Geomyces Traaen (1914)
         3 Genus Gymnostellatospora Udagawa, Uchiy. & Kamiya (1993)
         4 Genus Myxotrichum Kunze (1823), nom. sanct.
         5 Genus Oidiodendron Robak (1932)
         6 Genus Pseudogymnoascus Raillo (1929)