A new leafhopper, Odomas linnavuorii sp. nov. (Cicadellidae: Megophthalminae: Megophthalmini), is described based on a brachypterous female collected in the subalpine grassland in the highest part of the Mt Nimba massif, Guinea, West Africa. The new species has a highly derived head and wing structure and is densely covered with chalazal setae. As these features are unique both within the genus and tribe the morphology and the systematic placement of O. linnavuorii are discussed in the context of other ground-dwelling taxa of Membracoidea. In addition, the monotypic Afrotropical genus Coronophtus Van Stalle, 1983 is removed from Cicadellidae: Megophthalminae and synonymised with Listrophora Boulard, 1971 (Cicadellidae: Deltocephalinae: Chiasmini), resulting in one new combination, Listrophora cervus (Van Stalle, 1983), comb. nov.