Species Name: Leontocebus illigeri
(Leontocebus illigeri) is a species of saddleback tamarin, a type of small monkey native to South America. Illiger's saddleback tamarin is native to the Peruvian Amazon, and its type locality is in Loreto, Peru, on the left bank of the lower Ucayali River.
Species Name: Pithecia isabela
Isabel's Saki (Pithecia isabela) is a New World monkey species, native to a small part of northern Peru. The species was named in honor of Isabel Godin des Odonais, an 18th-century Ecuadorian noblewoman who traveled across South America to find her husband.
Suggested Reading: All Species of Monkeys