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 Alouatta nigerrima Lönnberg 1941 Alouatta nigerrima Lönnberg 1941 , Ark. f. Zool., 33A (10): 33 . Type Locality: Brazil , Amazonas , Patinga. Vernacular Names: Amazon Black Howler . Distribution: N Brazil , east of the Rio Trombetas to the Rio Tapajos, perhaps to the Rio Tocantins . Conservation: CITES – Appendix II. Discussion: A. seniculus species group. Separated from A. belzebul by Groves (2001 c ) .