Mesocnemis is a genus of African damselflies in the white-legged damselfly family (Platycnemididae). They are commonly known as Riverjacks.The genus contains the following species: \n* Mesocnemis dupuyi Legrand, 1982 - Gambia Riverjack \n* Mesocnemis robusta (Selys, 1886) \n* Mesocnemis saralisa Dijkstra, 2008 \n* Mesocnemis singularis Karsch, 1891 - Common Riverjack, Savanna Brook-damsel, Savanna Stream-damsel \n* Mesocnemis tisi Lempert, 1992 - Liberian Riverjack