Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Leotiomycetes O.E. Erikss. & Winka (1997)
       Order Phacidiales Bessey (1907)
         Family Tympanidaceae Baral & Quijada (2015)
           Genus Holwaya Sacc. (1889), nom. protect.