Alouatta pigra Lawrence, 1933 . Bull. Mus. Comp. Zool., 75:333.

TYPE LOCALITY: Guatemala, Petén, Uaxactun .

DISTRIBUTION: Yucatan and Chiapas (Mexico) to Belize and Guatemala.

STATUS: CITES - Appendix II; U.S. ESA - Threatened; IUCN - Insufficiently known as A. villosa .

SYNONYMS: luctuosa, villosa ?.

COMMENTS: The name villosa has been applied to this species (see Napier, 1976:76) but Lawrence (1933) regarded it as a nomen dubium; see Smith (1970:366) and Hall (1981:260, 263).