{"references": ["Napier, P. H. 1976. Catologue of primates in the British Museum (Natural History), Part 1: Families Callitrichidae and Cebidae. British Museum (Natural History), London, 121 pp.", "Lawrence, B. 1933. Howler monkeys of the Palliata group. Bulletin of the Museum of Comparative Zoology at Harvard College, 75: 314 - 354.", "Smith, J. D. 1970. The systematic status of the black howler monkey, Alouatta pigra Lawrence. Journal of Mammalogy, 51: 358 - 369.", "Hall, E. R. 1981. The mammals of North America. Second ed. John Wiley and Sons, New York, 1: 1 - 600 + 90, 2: 601 - 1181 + 90."]}

Alouatta pigra Lawrence, 1933. Bull. Mus. Comp. Zool., 75:333. TYPE LOCALITY: Guatemala, Peten, Uaxactun. DISTRIBUTION: Yucatan and Chiapas (Mexico) to Belize and Guatemala. COMMENT: The name villosa has been applied to this species (see Napier, 1976, Cat. Primates Br. Mus. (Nat. Hist.), Part 1, p. 76) but Lawrence, 1933, regarded it as a nomen dubium; see Smith, 1970, J. Mammal., 51:366, and Hall, 1981:260, 263. PROTECTED STATUS: CITES - Appendix II as Order Primates and U.S. ESA - Endangered as A. pigra. ISIS NUMBER: 5301406006006005001 as A. villosa.

Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Primates, pp. 216-243 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 226, DOI: 10.5281/zenodo.7353017