Hydrocanthus is a genus of beetles in the family Noteridae, containing the following species:
Hydrocanthus acrobeles Guignot, 1953Hydrocanthus adrasus Guignot, 1950Hydrocanthus advena Sharp, 1882Hydrocanthus alter Guignot, 1959Hydrocanthus ancus Guignot, 1942Hydrocanthus atripennis Say, 1830Hydrocanthus australasiae Wehncke, 1876Hydrocanthus carbonarius Guignot, 1936Hydrocanthus colini Zimmermann, 1926Hydrocanthus congoanus Gschwendtner, 1930Hydrocanthus congrex Guignot, 1959Hydrocanthus consimilis Gschwendtner, 1938Hydrocanthus constrictus Régimbart, 1895Hydrocanthus debilis Sharp, 1882Hydrocanthus delphinus Guignot, 1942Hydrocanthus fabiennae Bameul, 1994Hydrocanthus fasciatus Steinheil, 1869Hydrocanthus ferruginicollis Régimbart, 1895Hydrocanthus funebris Fairmaire, 1869Hydrocanthus gracilis H.J.Kolbe, 1883Hydrocanthus grandis (Laporte, 1835)Hydrocanthus guignoti Young, 1985Hydrocanthus impunctatus Gschwendtner, 1932Hydrocanthus indicus Wehncke, 1876Hydrocanthus insolitus Bilardo & Rocchi, 1987Hydrocanthus iricolor Say, 1823Hydrocanthus klarae Gschwendtner, 1930Hydrocanthus leleupi Guignot, 1955Hydrocanthus levigatus (Brullé, 1837)Hydrocanthus marmoratus Sharp, 1882Hydrocanthus micans Wehncke, 1883Hydrocanthus mocquerysi Régimbart, 1895Hydrocanthus oblongus Sharp, 1882Hydrocanthus occidentalis Young, 1985Hydrocanthus pallisteri Young, 1985Hydrocanthus paludicola Guignot, 1951Hydrocanthus paludimonstrus K.B.Miller, 2001Hydrocanthus paraguayensis Zimmermann, 1928Hydrocanthus parvulus Gschwendtner, 1930Hydrocanthus prolixus Sharp, 1904Hydrocanthus regius Young, 1953Hydrocanthus rubiginosus Guignot, 1942Hydrocanthus secutor Guignot, 1955Hydrocanthus sharpi Zimmermann, 1928Hydrocanthus sicarius Guignot, 1947Hydrocanthus socius R.F.Sahlberg, 1844Hydrocanthus subplanatus Gschwendtner, 1933Hydrocanthus upembicus Guignot, 1954Hydrocanthus vadoni Guignot, 1936Hydrocanthus waterhousei Blackburn, 1888Hydrocanthus wittei Gschwendtner, 1930