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)
           1 Genus Rhynchostoma P.Karst. (1870)
           2 ?Genus Rhynchomeliola Speg. (1884)