Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes
   Subphylum Agaricomycotina Doweld (2001)
     Class Tremellomycetes Doweld (2001)
       Order Trichosporonales Boekhout & Fell (2001)
         Family Tetragoniomycetaceae Oberw. & Bandoni (1981) see Family Rhynchogastremaceae Oberw. & B. Metzler (1989)
           1 Genus Bandonia Yurkov, Xin Zhan Liu, F.Y. Bai, M. Groenew. & Boekhout (2015)
           2 Genus Cryptotrichosporon Okoli & Boekhout (2007)
           3 Genus Takashimella Q.M. Wang (2015)