Abstract
Small troop sizes which averaged 5.23 members per troop and the early descent of male testes inAlouatta pigra show a marked difference fromA. palliata. These differences strengthenSmith's (1970) observations of morphological differences betweenA. pigra andA. palliata.
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Horwich, R.H. Species status of the black howler monkey,Alouatta pigra, of Belize. Primates 24, 288–289 (1983). https://doi.org/10.1007/BF02381092
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DOI: https://doi.org/10.1007/BF02381092