Hydrophilidae Latreille, 1802
Cymbiodyta acuminata Fall, 1924
Cymbiodyta arizonica Smetana, 1974
Cymbiodyta beckeri Smetana, 1974
Cymbiodyta blanchardi Horn, 1890
Cymbiodyta brevicollis (Sharp, 1882)
Cymbiodyta chamberlaini Smetana, 1974
Cymbiodyta columbiana Leech, 1948
Cymbiodyta dorsalis (Motschulsky, 1859)
Cymbiodyta enumera Smetana, 1974
Cymbiodyta fraterculus (Sharp, 1882)
Cymbiodyta howdeni Smetana, 1974
Cymbiodyta imbellis (LeConte, 1861)
Cymbiodyta leechi Miller, 1964
Cymbiodyta marginella (F., 1792)
Cymbiodyta minima Notman, 1919
Cymbiodyta occidentalis Smetana, 1974
Cymbiodyta pacifica Leech, 1948
Cymbiodyta polita (Sharp, 1882)
Cymbiodyta pseudopacifica Smetana, 1974
Cymbiodyta puella Smetana, 1974
Cymbiodyta punctatostriata (Horn, 1873)
Cymbiodyta rotunda (Say, 1825)
Cymbiodyta semistriata (Zimmermann, 1869)
Cymbiodyta seriata Smetana, 1974
Cymbiodyta toddi Spangler, 1966
Cymbiodyta vindicata Fall, 1924