New Monkey Species Colobus Congoensis Formally Described in Democratic Republic of Congo

Researchers have formally described a new monkey species, Colobus congoensis, in the Democratic Republic of Congo. The primate occurs in forests between the Lomami and Lualaba rivers in the east-central part of the country. The study detailing the species was published in PLOS One on 15 July 2026.

Adults weigh approximately 7 kilograms and live in groups averaging six individuals. The monkey has glossy black fur, a long tail, and a vivid orange-cream patch around the mouth and nose, along with striking pinkish-orange lips and a black face. The species produces deep roaring vocalisations.

It was first spotted in 2008 in the Lomami National Park region, with a clearer photograph obtained in November 2018. Researchers recorded 114 sightings between 2018 and 2022. Its estimated range covers 1,700 square kilometres.

Mitochondrial DNA analysis shows the species diverged from its closest relative approximately 4 to 5 million years ago. Junior Amboko, a doctoral candidate at Florida Atlantic University who led the fieldwork, said discovering the species was an amazing feeling.

Researchers have proposed classifying Colobus congoensis as endangered on the IUCN Red List due to its limited range, small population, habitat loss and hunting pressure. At least 15 new villages were established near the Lomami National Park buffer zone between 2015 and 2023.