Oenomaus atena is a species of butterfly of the family Lycaenidae. It is widely distributed in lowland in Costa Rica, Panama, western Ecuador, French Guiana, Venezuela, Peru and Brazil. Most species with an atena-like ventral wing pattern have historically been identified as O. atena, which means that virtually all literature records for this species from before 2005 are unreliable.Review of the species level taxonomy of the neotropical butterfly genus Oenomaus (Lycaenidae, Theclinae, Eumaeini)
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