“…Variation in the numbers of chromosomes has been described in Aotus trivirgatus: chromosome numbers of 46 (Ma et a!.. 19766), 49-50 (Ma et al, 1976a;Yunis et al, 1977;Cambeiort and Moro, 1978), 52 (Ma et al, 19766;Miller et al, 1977), 54 (Brumback et al, 1971;de Boer et al, 1971;Ma et al, 1976a;M iller et al, 1977), and 56 (Bogart, 1978). The differences observed are the result of translocations (Robertsonian and others).…”