Opistoma diglena (Schmarda, 1859) Graff, 1882 accepted as Mesopharynx diglena Schmarda, 1859
Opistoma oculata Pereyaslawzewa, 1892 accepted as Opistomum oculatum Pereyaslawzewa, 1892 accepted as Solenopharynx oculatus (Pereyaslawzewa, 1892) Graff, 1905 accepted as Tangaroa oculatus (Pereyaslawzewa, 1892) Marcus, 1951 accepted as Sopharynx oculatus (Pereyaslawzewa, 1892) Beklemischev, 1929
Opistomum arseni accepted as Opistomum arsenii Nasonov, 1917
Opistomum arsenii Nasonov, 1917
Opistomum dimitrii Nasonov, 1919 (uncertain > nomen dubium )
Opistomum fuscum Weise, 1942
Opistomum immigrans Ax, 1956
Opistomum oculatum Pereyaslawzewa, 1892 accepted as Solenopharynx oculatus (Pereyaslawzewa, 1892) Graff, 1905 accepted as Tangaroa oculatus (Pereyaslawzewa, 1892) Marcus, 1951 accepted as Sopharynx oculatus (Pereyaslawzewa, 1892) Beklemischev, 1929
Opistomum pallidum Schmidt, 1848
Opistomum schultzeanum (Diesing, 1862) De Man, 1875 accepted as Opistomum pallidum Schmidt, 1848
Opistomum serpentina (Dalyell, 1853) Johnston, 1865 accepted as Prorhynchus serpentinus (Dalyell, 1853) Leuckart, 1859 accepted as Prorhynchus stagnalis Schultze, 1851
Opistomum striatum Graff, 1878 accepted as Enterostoma striatum (Graff, 1878) Graff, 1882 accepted as Monoophorum striatum (Graff, 1878) Böhmig, 1890
Opistomum tundrae Nasonov, 1923
Opistomum vejdovskyi Sekera, 1911 accepted as Opistomum pallidum Schmidt, 1848