Diacyclops Kiefer, 1927
Diacyclops languidus belgicus Kiefer, 1936
Diacyclops languidus deminutus Sterba, 1954
Diacyclops languidus disjunctus (Thallwitz, 1927)
Diacyclops languidus subsp. languidus (G. O. Sars, 1863)
Diacyclops languidus linneanus (Lindberg, 1949)
Diacyclops languidus nana (Schmeil, 1898)
