Species (41)
- Vorticella microstoma ssp. microstoma
- Eulima microstoma ssp. microstoma
- Encalypta microstoma Bals.-Criv. & De Not.
- Encalypta ciliata var. microstoma
- Microstoma floccosum (Schwein.) Raitv. 1965
- Microstoma protractum (Fr.) Kanouse 1948
- Vorticella microstoma ssp. halophila
- Paramaecium microstoma Claparède & Lachmann 1858
- Colpodidium microstoma Foissner, Agatha & Berger 2002
- Stylonychia microstoma
- Limnaea microstoma
- Enchelys microstoma
- Auricula microstoma
- Epistylis microstoma
- Phaedusa microstoma
- Isotricha microstoma
- Colpodidium microstoma Foissner, Agatha & Berger 2002
- Strongylidium microstoma Dragesco & Dragesco-Kernéis 1986
- Eulima microstoma ssp. ibizenca
- Eulima microstoma
- Vorticella microstoma ssp. defluviatil?
- Vorticella microstoma Keiser 1921 ssp. abreviata
- Weisia microstoma (Hedw.) C. Müll
- Opercularia microstoma Stein 1868
- Paranassula microstoma Claparède & Lachmann 1859
- Frontonia microstoma Kahl 1931
- Kahliella microstoma Dragesco & Dragesco-Kernéis 1986
- Remanella microstoma Dragesco 1954
- Vorticella microstoma Ehrenberg 1830
- Nassula microstoma Cohn 1866
- Nassula microstoma Calkins 1903
- Alexia microstoma
- Funaria microstoma Bruch ex Schimp.
- Weissia microstoma (Hedw.) Müll.Hal.
- Vorticella abreviata ssp. microstoma
- Vorticella acinosa ssp. microstoma
- Vorticella microstoma-Komplex
- Plectania hiemalis (Nees & Bernstein) Seaver 1928
- Plectania protracta (Fr.) S. Imai 1938
- Sarcoscypha hiemalis (Nees & Bernstein) J. Schröt. 1893
- Sarcoscypha protracta (Fr.) Sacc. 1889