New Monkey Species Colobus congoensis Discovered

Why in News?

Scientists have identified a new species of Old World monkey, Colobus congoensis, in the Democratic Republic of Congo (DRC). Locally known as the “Likweli” monkey, the species was confirmed through extensive genetic, anatomical, and acoustic analyses, making it one of the most significant primate discoveries in Africa in recent decades.

The discovery was published in the peer-reviewed journal PLOS One on 15 July 2026. Researchers have also recommended that the species be classified as Endangered due to its restricted distribution and increasing habitat threats.

About Colobus congoensis (Likweli Monkey)

Colobus congoensis is a newly described species belonging to the colobus monkeys, a group of Old World monkeys (Family: Cercopithecidae) native to Africa. Colobus monkeys are well known for their long tails, leaf-based diet, and arboreal lifestyle in tropical forests.

The newly identified species is locally known as Likweli, named after the region where it occurs in the Congo Basin.

The discovery represents only the fifth new African monkey species identified in the past 75 years, highlighting the remarkable but still poorly understood biodiversity of Central African rainforests.

Taxonomy and Scientific Identification

The species was formally confirmed after researchers compared its:

• DNA (genetic analysis)
• Body structure (anatomical analysis)
• Vocalisations (acoustic analysis)

These independent lines of evidence demonstrated that the monkey is genetically and morphologically distinct from all previously known colobus species.

Its closest living relative is Colobus satanas (Black Colobus), yet the two populations are separated by more than 1,200 kilometres.

Genetic studies estimate that both species diverged from a common ancestor approximately 4–5 million years ago, indicating a long and independent evolutionary history.

Physical Characteristics

The Likweli monkey possesses several distinctive external features that differentiate it from other African colobus monkeys.

Key identification features include:

• Predominantly black body colour
• Pinkish-orange lips
• Orange or cream-coloured markings around the mouth and nose
• Bare grey cheekbones
• White patch of fur surrounding the anal region
• Long tail adapted for arboreal movement

Researchers also identified unique vocal calls, which played an important role in confirming its taxonomic status.

Habitat and Distribution

The species has an extremely restricted geographic range, occupying only about 1,700 square kilometres within the Congo Basin.

Its known distribution lies between the:

• Lomami River
• Lilo River

Most populations occur within Lomami National Park, one of Central Africa’s most important protected rainforest landscapes.

The Congo Basin, after the Amazon, is the second-largest tropical rainforest in the world and supports exceptional levels of biodiversity, including numerous endemic mammals, birds, reptiles, and amphibians.

Discovery Timeline

The discovery of Colobus congoensis was the result of nearly two decades of field research.

The prolonged investigation demonstrates the importance of long-term biodiversity surveys in remote tropical forests.

Conservation Status

Although the species has only recently been described, scientists have already recommended that it be listed as Endangered on the IUCN Red List.

The recommendation is based on several factors:

• Extremely limited geographic range
• Small and fragmented population
• Ongoing habitat destruction
• Hunting pressure (bushmeat)
• Increasing human disturbance

Given its restricted distribution, even minor habitat degradation could significantly threaten the species’ survival.

Importance of Lomami National Park

The discovery further highlights the global conservation importance of Lomami National Park, located in the Democratic Republic of Congo.

The park has become internationally recognised for the discovery of several rare and endemic species, including:

• Lesula Monkey (Cercopithecus lomamiensis) (2012)
• Likweli Monkey (Colobus congoensis) (2026)

Lomami National Park forms a crucial part of the Congo Basin rainforest ecosystem and serves as an important refuge for endangered primates, forest elephants, okapis, and numerous endemic species.

Scientific Institutions Involved

The discovery resulted from collaboration among several international research institutions, including:

• Florida Atlantic University
• Lukuru Wildlife Research Foundation
• Yale University
• City University of New York
• Lomami National Park
• Frankfurt Zoological Society

The study demonstrates the importance of international cooperation in biodiversity exploration and wildlife conservation.

Significance

The discovery of Colobus congoensis underscores that even today, previously unknown mammal species continue to be discovered in Earth’s remaining tropical forests.

It also highlights the urgent need to conserve the Congo Basin, one of the planet’s most important biodiversity hotspots. Protecting such ecosystems is critical not only for preserving endangered wildlife but also for maintaining global climate stability, carbon storage, and ecological balance.

Important Facts for Exams

• The Congo Basin is the second-largest tropical rainforest in the world after the Amazon.
• Old World monkeys belong to the family Cercopithecidae and are naturally distributed across Africa and Asia.
• The IUCN Red List is the world’s most widely used system for assessing species conservation status.
• Lomami National Park is also famous for the discovery of the Lesula Monkey (Cercopithecus lomamiensis) in 2012.

Frequently Asked Questions (FAQs)

Q1. What is Colobus congoensis?

Colobus congoensis is a newly discovered species of Old World colobus monkey found in the Democratic Republic of Congo.

Q2. Where is the Likweli monkey found?

The species is found between the Lomami and Lilo Rivers, mainly within Lomami National Park in the Congo Basin.

Q3. Why has the species been recommended as Endangered?

Researchers recommend Endangered status due to its small geographic range, limited population, habitat loss, and hunting pressure.

Q4. Which journal published the discovery?

The discovery was published in the peer-reviewed journal PLOS One on 15 July 2026.

Q5. What makes this discovery significant?

It is only the fifth new African monkey species discovered in the last 75 years, highlighting the rich yet understudied biodiversity of the Congo Basin.