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 Chaetothyriales M.E.Barr (1987) Family Pyrenotrichaceae Zahlbr. (1926) [monotypic] Genus Pyrenothrix Riddle (1917)