Megathecla is a gossamer-winged butterfly genus of tribe Eumaeini in the subfamily Theclinae. These butterflies are found in the Neotropic ecozone. The distinctness of this genus was only recognized after the year 2000, even though the type species M. gigantea has been scientifically known since the late 19th century. It contains three species at present, but undescribed ones are likely to exist: \n* Megathecla corentini Faynel, 2009 \n* Megathecla cupentus (Stoll, [1781]) (sometimes in Cupathecla) \n* Megathecla gigantea (Hewitson, 1867)