Phylum Parabasalia Honigberg, 1973 see Infraphylum Parabasalia Honigberg, 1973
   Class Trichomonadea Kirby, 1947
     Order Honigbergiellida Cepicka, Hampl & Kulda, 2010 see Suborder Honigbergiellina Čepička et al., 2010
       Family Tricercomitidae Cepicka, Hampl & Kulda, 2010
         1 Genus Tricercomitusᵀ Kirby, 1930