Classification
Tree [regio]Heteroptera [subordo]
Gerridae [familia]
Gerrinae [subfamilia]
Aquarius [genus]
Genus Aquarius Schellenberg, 1800 contains the following taxa:
Aquarius adelaidis (Dohrn, 1860) [species]
Aquarius cinereus (Puton, 1869) [species]
Aquarius elongatus (Uhler, 1897) [species]
Aquarius najas (De Geer, 1773) [species]
Aquarius paludum (Fabricius, 1794) [species]
Aquarius ventralis (Fieber, 1860) [species]