''Euptera neptunus'', the Neptune euptera, is a butterfly in the family Nymphalidae. It is found in eastern Nigeria, Cameroon and the Democratic Republic of the Congo (from the central and eastern part of the country to Uele, the Lindi Valley, Tshuapa, Cataractes and Sankuru).Afrotropical Butterflies: Nymphalidae - Tribe Adoliadini
/ref> The habitat consists of forests.

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