{{Short description|Species of New World monkey}} {{Speciesbox | image = Pithecia isabela.jpg | status = DD | status_system = IUCN3.1 | status_ref = <ref name="iucn">{{cite iucn |author=Marsh, L.K. |date=2018|title=''Pithecia isabela'' |volume=2018|article-number=e.T70609893A70609906|doi=10.2305/IUCN.UK.2018-2.RLTS.T70609893A70609906.en}}</ref> | taxon = Pithecia isabela | authority = Marsh, 2014 }} '''Isabel's saki''' ('''''Pithecia isabela''''') is a species of saki monkey, a type of New World monkey. It is endemic to a small portion of northern Peru.<ref name=":0">{{Cite mdd|title=''Pithecia isabela'' Marsh, 2014|id=1000909|access-date=2021-12-05}}</ref><ref name=":2">{{Cite ITIS |taxon= Pithecia|id=572819|access-date=2021-12-01}}</ref>
== Taxonomy == Populations in this species were formerly classified within the monk saki (''P. monachus''), but a 2014 study described these populations as a distinct species, ''P. isabela'', based on their distinctive pelage.<ref name=":04" /><ref>{{Cite web|date=2014-09-02|title=Scientists uncover five new species of 'toupee' monkeys in the Amazon|url=https://news.mongabay.com/2014/09/scientists-uncover-five-new-species-of-toupee-monkeys-in-the-amazon/|access-date=2021-12-06|website=Mongabay Environmental News|language=en-US}}</ref> The American Society of Mammalogists, IUCN Red List, and ITIS all follow this classification.<ref name=":0" /><ref name=":2" /><ref name=":04">{{Cite journal|last=Marsh|first=Laura K.|date=2014-08-01|title=A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804|url=https://bioone.org/journals/neotropical-primates/volume-21/issue-1/044.021.0101/A-Taxonomic-Revision-of-the-Saki-Monkeys-Pithecia-Desmarest-1804/10.1896/044.021.0101.full|journal=Neotropical Primates|volume=21|issue=1|pages=1–165|doi=10.1896/044.021.0101|s2cid=86516301 |issn=1413-4705|url-access=subscription}}</ref><ref name="iucn" />
It was named in honor of Isabel Godin des Odonais, an 18th-century Ecuadorian noblewoman who trekked across South America to reunite with her husband.<ref name=":04" />
== Distribution == It is known only from a small portion of northern Peru in the vicinity of the Pacaya-Samiria National Reserve.<ref name=":04" />
== Description == This species closely resembles the Napo saki (''P. napensis''), with both species sharing an overall dark coloration with distinctive white patches above the eyes, but ''P. napensis'' also has dense white fur on the forehead, while ''P. isabela'' has much more diffuse white fur. ''P. isabela'' also has a less extensive, slightly duller orange ruff than ''P. napensis''.<ref name=":04" /><ref>{{Cite web|title=Five New Species of Saki Monkeys Discovered |url=http://www.sci-news.com/biology/science-five-new-species-saki-monkeys-02183.html |date=30 September 2014 |access-date=2021-12-06|website=Sci-News.com|language=en-US}}</ref>
== Status == This species is thought to be threatened by logging and poaching, as well as its small range, and thus its population is thought to be declining. They are sometimes also found in the pet trade. In addition, numerous tourist lodges have sprung up within the Pacaya-Samiria National Reserve due to increasing ecotourism, and tourist photos indicate that other saki species such as the equatorial saki (''P. aequatorialis'') and potentially ''P. napensis'' have been introduced to these lodges as free-ranging pets; if these animals become established in the wild, they could potentially hybridize with the native ''P. isabela''. However, this species remains poorly-known and it is thus classified as data deficient on the IUCN Red List.<ref name=":04" /><ref name="iucn" />
== References == {{Reflist}}
{{Taxonbar|from=Q20721808}}
Isabel's saki Category:Mammals of Peru Category:Endemic fauna of Peru Isabel's saki Category:Arboreal mammals