Black Angle, Sinharaja, Sri Lanka

''Tapena'' is a monotypic genus of butterflies in the family Hesperiidae subfamily Pyrginae. Its single species is ''Tapena thwaitesi'', the black angle, found in Indomalayan realm. The species was described by Frederic Moore in 1881 and is named after George Henry Kendrick Thwaites, the director of the botanical garden at Peradeniya, Sri Lanka between 1849 and 1880.