Megadytes is a mainly Neotropical genus of large diving beetles in family Dytiscidae. It contains the following species:
Megadytes aubei (Wilke, 1920)Megadytes australis (Germain, 1854)Megadytes carcharias Griffini, 1895Megadytes ducalis Sharp, 1882Megadytes ecuadorius Zimmermann, 1919Megadytes fallax (Aubé, 1838)Megadytes flohri Sharp, 1882Megadytes fraternus Sharp, 1882Megadytes glaucus (Brullé, 1837)Megadytes gravidus Sharp, 1882Megadytes guayanensis (Wilke, 1920)Megadytes guignoti Mouchamps, 1957Megadytes laevigatus (Olivier, 1795)Megadytes latus (Fabricius, 1801)Megadytes lherminieri (Guérin-Méneville, 1829)Megadytes magnus Trémouilles & Bachmann, 1980Megadytes marginithorax (Perty, 1830)Megadytes nicoleti (Heer, 1862)Megadytes obesus Sharp, 1882Megadytes perplexus Sharp, 1882Megadytes robustus (Aubé, 1838)Megadytes steinheili (Wehncke, 1876)
