“…Several aspects of the social system of spider monkeys remain poorly understood in spite of previous field and laboratory studies of their social behavior (CARPENTER, 1935;KLEIN, 1971KLEIN, , 1972KLEIN, , 1974KLEIN & KLEIN, 1971, 1973EISENBERG & KUErIN, 1966;EISEN-BERG, 1976;RlcrtgRo, 1970;CANT, 1976CANT, , 1978COELnO et al, 1976COELnO et al, , 1977IZAWA, KIMURA NIETO, 1979;RONDINELLI & KLEIN, 1976). KLEIN and CARPENTER described spider monkeys as living in large territorial, multi-male, multi-female social groups which fission for travel into small unstable subgroups of around three to four individuals.…”