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Bassaricyon

life science Maturity 11-13 Next article →

The genus *Bassaricyon* consists of small Neotropical procyonids. These animals are popularly known as olingos. They are close relatives of the raccoon. Olingos live in the rainforests of Central and South America. Their range extends from Nicaragua to Peru. These creatures are arboreal, meaning they live in trees. They are also nocturnal, so they are active at night. They live at many elevations. This includes areas from sea level up to high mountains.

Olingos share many physical traits with kinkajous. Both animals have similar body shapes and habits. However, they are not the same kind of animal. Olingos have more extended muzzles than kinkajous. They also possess anal scent glands. Unlike kinkajous, olingos lack prehensile tails. A prehensile tail is one that can grasp objects. They also lack extrudable tongues. This means their tongues cannot stretch out. Because of these similarities, olingos are often misidentified as kinkajous in zoos.

Scientists disagree on how many species belong in this genus. Some taxonomists, who study the naming of animals, split them into five species. This group includes *B. pauli*. Other experts believe there are only two species. They suggest dropping *B. medius* and *B. neblina* from the list. Some researchers think there is only one single species, *B. gabbii*. For a long time, only the northern olingo, *B. gabbii*, was well-known. It was often simply called "the olingo."

A major discovery happened recently in the Andes of Ecuador. In 2006, Kristofer Helgen found a previously unrecognized olingo at Las Maquinas. This animal was similar to *B. alleni* but distinct. Helgen named this species *B. neblina*, or the olinguito. He presented his findings on August 15, 2013. He and his coworkers used many types of data. They looked at anatomy and morphometrics, which is the study of shape and size. They also used nuclear and mitochondrial DNA. Finally, they used field observations and geographic range modeling.

Genetic studies help us understand how olingos evolved. The closest relatives to olingos are actually coatis. The two groups diverged about 10.2 million years ago. This happened during the Tortonian age. Kinkajous are a much older lineage. They split from other procyonids about 22.6 million years ago during the Aquitanian age. The similarity between olingos and kinkajous is an example of parallel evolution. This occurs when different animals evolve similar traits independently.

The diversification of the olingo genus began about 3.5 million years ago. First, *B. neblina* branched off from the other species. Then, *B. gabbii* split off about 1.8 million years ago. The two lowland species, *B. alleni* and *B. medius*, diverged about 1.3 million years ago. These changes happened as the ancestors of olingos moved into South America. This movement was part of the Great American Interchange. This event allowed animals to move between the two continents.

The history of the olingo is quite different from the kinkajou. Kinkajous likely arose in Central America. They lived there long before they reached South America. In contrast, olingos likely invaded South America from Central America. The earliest diversification of the genus happened in northwestern South America. This occurred shortly after they arrived on the continent. Understanding these timelines helps scientists map how life spreads across the world.

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