Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Pezizomycotina O.E. Erikss. & Winka (1997) Class Eurotiomycetes O.E. Erikss. & Winka (1997) Subclass Eurotiomycetidae Tehler ex Geiser & Lutzoni (2007), nom. inval. Order Eurotiales G.W. Martin ex Benny & Kimbr. (1980) Family Thermoascaceae Apinis (1967) Genus Thermoascus Miehe (1907)