Order Primates Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1 111 184 book chapter 0-8018-8221-4 10.5281/zenodo.7316519 Lagothrix poeppigii Schinz 1844 Lagothrix poeppigii Schinz 1844 , Syst. Verz. Saugeth., 1: 72 . Type Locality: Peru , Loreto , lower Rio Huallaga, north of Yurimaguas. Vernacular Names: Silvery Woolly Monkey . Synonyms: Lagothrix castelnaui I. Geoffroy and Deville 1848 . Distribution: Highlands of E Ecuador and N Peru , to about 70°W , 5°S in Brazil . Conservation: CITES – Appendix II; IUCN – Vulnerable.