| Nasuella olivacea | |
|---|---|
 | |
| N. olivacea in Colombia | |
Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Carnivora |
| Family: | Procyonidae |
| Genus: | Nasuella |
| Species: | N. olivacea |
| Binomial name | |
| Nasuella olivacea (J. E. Gray, 1865) | |
 | |
Thewestern mountain coati orwestern dwarf coati (Nasuella olivacea) is a smallprocyonid, found incloud forest andpáramo at altitudes of 1,300–4,250 metres (4,270–13,940 ft) in theAndes ofColombia andEcuador.[2] A population discovered in theApurímac–Cuzco region of southernPeru (more than 1,000 km or 620 mi south of the previous distribution limit) has tentatively been identified as the western mountain coati, but may represent anundescribed taxon.[3]
Until 2009, the western mountain coati (then simply known as the mountain coati) usually included theeastern mountain coati as asubspecies, but that species is overall smaller, somewhat shorter-tailed on average, has markedly smaller teeth, a palerolive-brownpelage, and usually a dark mid-dorsal stripe on the back (versus morerufescent or blackish, and usually without a dark mid-dorsal stripe in the western mountain coati).[2] When the two were combined, they were rated asData Deficient by theIUCN, but following the split the western mountain coati is consideredNear Threatened.[1] After a genetic analysis in 2020, theAmerican Society of Mammalogists currently considersN. meridensis a synonym ofN. olivacea.[4]
There are two subspecies of the western mountain coati:N. o. olivacea and the slightly smaller and darkerN. o. quitensis with less distinct rings on the tail.[2] The former is known from Colombia and the latter from Ecuador, but the exact distribution limit between the two is not known.[2]
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