Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Family Protothelenellaceae Vězda, H. Mayrhofer & Poelt (1985)
     1 Genus Mycowinteria Sherwood (1986)
     2 Genus Protothelenella Räsänen (1943)
     3 Genus Thrombium Wallr. (1831)