Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes
   Subphylum Agaricomycotina Doweld (2001)
     Class Agaricomycetes Doweld (2001)
       Order Trechisporales K.H. Larss. (2007), incertae sedis
         Family Hydnodontaceae Jülich (1982)
           01 Genus Brevicellicium K.H. Larss. & Hjortstam (1978)
           02 Genus Dextrinocystis Gilb. & M. Blackw. (1988)
           03 Genus Dextrinodontia Hjortstam & Ryvarden (1980)
           04 Genus Hydnodon Banker (1913)
           05 Genus Litschauerella Oberw. (1965)
           06 Genus Luellia K.H. Larss. & Hjortstam (1974)
           07 Genus Porpomyces Jülich (1982)
           08 Genus Scytinopogon Singer (1945)
           09 Genus Sistotremastrum J.Erikss. (1958)
           10 Genus Sphaerobasidium Oberw. (1965)
           11 Genus Subulicystidium Parmasto (1968)
           12 Genus Trechispora P.Karst. (1890)
           13 Genus Tubulicium Oberw. (1965)