organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain eukaryotes see Domain Eukaryota Chatton, 1925
     flagellated protists
       Phylum Parabasalia Honigberg, 1973 see Infraphylum Parabasalia Honigberg, 1973
         Class Trichomonada see Class Trichomonadea Kirby, 1947
           Order Trichomonadida Kirby, 1947 - trichomonads
             Family Cochlosomatidae E.E. Tyzzer, 1930 see Family Trichomonadidae Chalmers & Pekkola, 1918
               1 Genus Cochlosoma Kotlán, 1923
               2 Genus Cyathosoma Tyzzer, 1930
               3 Genus Ptychostoma Tyzzer, 1930