Procolobus epieni is a monotypic species (no subspecies).
Found only in a small section of the wetland's marsh and swamp forests, the Niger Delta red colobus remained wholly unknown to scientists until 1993. When it was first uncovered, scientists thought it a subspecies of Pennant's colobus , but genetic research in 2008 upgraded the monkey to a full species in its own right .
Niger Delta (Nigeria)
IUCN Conservation Status