Aquarius Schellenberg, 1800: 25. Type species by subsequent designation (Opinion 247/1954): Cimex najas De Geer, 1773.
Hygrotrechus Stål, 1868b: 395 (syn. Kirkaldy, 1906a: 155). Type species by monotypy: Cimex najas De Geer, 1773.
Aquarius Schellenberg, 1800: 25. Type species by subsequent designation (Opinion 247/1954): Cimex najas De Geer, 1773.
Hygrotrechus Stål, 1868b: 395 (syn. Kirkaldy, 1906a: 155). Type species by monotypy: Cimex najas De Geer, 1773.
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