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J Med Primatol. 1978;7(3):129-35.

Possible errors in identification of squirrel monkeys (Saimiri sciureus) from different South American points of export.


We conducted karyological studies on one colony consisting of 12 Colombian and 34 Bolivian squirrel monkeys and a second colony of 47 monkeys imported into the United States between 1968 and 1974 through six importers. All animals in the first colony showed six acrocentric pairs of chromosomes. Bolivian monkeys were phenotypically distinguishable by their large size and coloration. In the second colony, 19 Peruvian, seven Colombian, five Bolivian and six Guyanan monkeys were correctly identified phenotypically and had five, six, six, and seven acrocentric pairs of chromosomes, respectively. Among Peruvian monkeys, 34.5% of the phenotypic classifications were in error.

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