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 Honigbergiellidae Cepicka, Hampl & Kulda, 2010
Genus Monotrichomonas Bernard, Simpson & Patterson, 2000