Endemic to central Africa, where confined to rainforest in DR Congo limited in the north by the Ubangi R. and in the south by the Kasai R.; also present in western Uganda. A disjunct population lives on the slopes (between 1,500 and 2,900 m asl) of Mt. Elgon, Uganda (Van Rompaey and Colyn in press). May occur in south-western Central African Republic (Ray 2001).
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