Endemic only to the Congo basin in Africa, it was originally described as a separate species in 1948. In 1961, it was downgraded to subspecies level and just 2 years ago it was found to be distinct enough to be full separate species.
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Endemic only to the Congo basin in Africa, it was originally described as a separate species in 1948. In 1961, it was downgraded to subspecies level and just 2 years ago it was found to be distinct enough to be full separate species.