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) Family Rhynchostomataceae Winka & O.E. Erikss. (2000), incertae sedis Genus Rhynchostoma P.Karst. (1870)