Microstomum Schmidt, 1848

Microstomum bioculatum Faubel, 1984

Microstomum bispiralis Stirewalt, 1937

Microstomum breviceps Marcus, 1951

Microstomum canum Fuhrmann, 1894

Microstomum caudatum Leidy, 1852

Microstomum coerulescens (Schmarda, 1859)

Microstomum crildensis Faubel, 1984

Microstomum davenporti Graff, 1911

Microstomum dermophthalmum Riedel, 1932

Microstomum diplolethicum Steinböck, 1931

Microstomum gabriellae Marcus, 1950

Microstomum groenlandicum Levinsen, 1879

Microstomum hamatum Westblad, 1952

Microstomum hanatum Westblad, 1953

Microstomum jenseni Riedel, 1932

Microstomum lineare (Müller OF, 1773)

Microstomum littorale Ørsted, 1845

Microstomum lucidum Fuhrmann, 1898

Microstomum melanophthalmum Steinböck, 1933

Microstomum mortenseni Riedel, 1932

Microstomum mundum Graff, 1905

Microstomum ornatum Uljanin, 1870

Microstomum papillosum Graff, 1882

Microstomum paradii Graff, 1913

Microstomum philadelphicum Leidy, 1852

Microstomum punctatum Dorner, 1902

Microstomum rhabdotum Marcus, 1951

Microstomum rubromaculatum Graff, 1882

Microstomum septentrionale Sabussow, 1900

Microstomum spiculifer Faubel, 1974

Microstomum spiriferum Westblad, 1953

Microstomum trichotum Marcus, 1950

Microstomum ulum Marcus, 1950