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Cytogenetic study of Saguinus midas midas (Callithricidae, Primata) from Jari, Brazilian Amazon region. Comparison with the karyotype of Saguinus millas piger

Cleusa Y. Nagamachi; Julio C. Pieczarka; Regina M.S.Barros

Departamento de Genética, Centro de Ciências Biológicas, Universidade Federal do Pará, Campus do Guamá, 66059 Belém, PA, Brasil

ABSTRACT

Six specimens of Saguinus midas niidas from the banks of the Jari river (Brazilian Amazon region) were studied cytogenetically. All animals had 2n = 46. One animal showed a difference in the C-banding pattern of chromosome 9. The banding patterns obtained were compared with those previously reported for S. m. niger. The two species only differ by a variation in the amount of constitutive heterochromatin, which is greater in pair 7 and in chromosome Y of S.m. midas.

Keywords: Cytogenetic; Saguinus midas midas; Primata; Brazilian Amazon; karyotype; Saguinus midas niger.

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