Napo saki explained

The Napo saki (Pithecia napensis), also known as the Napo monk saki, is a species of saki monkey, a type of New World monkey. Its range includes parts of eastern Ecuador and northern Peru. The name is derived from the Napo River in its locality. This species was originally described by Lönnberg as the subspecies Pithecia monachus napensis and has been treated as a synonym of P. monachus monachus. Hershkovitz retained it under P. monachus in 1987,^[1] but it was raised to full species status in 2014.^[2]

Notes and References

1. Hershkovitz. P.. Philip Hershkovitz. The taxonomy of south American sakis, genus Pithecia (Cebidae, Platyrrhini): A preliminary report and critical review with the description of a new species and a new subspecies. American Journal of Primatology. 12. 4. 1987. 387–468. 10.1002/ajp.1350120402. 31973491. 86775905.
2. Marsh. L. K.. A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804. Neotropical Primates. 21. 1. July 2014. 1–165. 10.1896/044.021.0101. 86516301.