The Endymion Opal (Poecilmitis endymion) là một loài butterfly in the Lycaenidae family. It is endemic to South Africa.
The wingspan is 30–34 mm for males and 30–38 mm for females. Adults are on wing from November to January. There is one extended generation per year.
The larvae feed on Thesium and Thesidium species. They are attended to by Crematogaster peringueyi ants.
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