The Neotropical coroebine genus Eudiadora is fully revised for the first time. Four species are recognized with four new synonymies proposed: E. pulchra (Obenberger) (= vianai Obenb. = cordobensis Obenb. = pulcherrima Cobos); E. kerremansi Obenberger (= negrei Cobos); E. meliboeoides Obenberger and E. bronzeola Cobos. The genus and species are redescribed, separated in a key, illustrated and the distribution shown on a map. The genus is discussed with regard to possible relationships within the tribe. Lectotypes are designated for E. cordobensis, E. vianai and E. meliboeoides.