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The karyotype of Ateies paniscus paniscus (Cebidae, Primates): 2n = 32

Julio Cesar Pieczarka; Cleusa Yoshiko Nagamachi; Regina M.S. Barros

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

ABSTRACT

In the present paper we report the karyotype of Ateles paniscus paniscus. Four animals from the borders of the Jari and Uatumã rivers, Brazilian Amazon region, presented 2n = 32 and FN = 31. In a review of cytogenetic data about Ateles, Kunkel et al. (Int. J. Primatol. 1: 223-232, 1980) demonstrated that A. belzebuth belzebuth, A. b. hybridus, A. fusciceps robustus, A. geoffroyi geoffroyi and A. paniscus chamek have 2n = 34 and FN = 33, and that there are differences among taxonomic groups due to inversions. The reduction in chromosome number detected in A. p. paniscus is due to fusion between chromosomes 4 and 12. By comparing the above karyotypes, it can be seen that the Ateles populations that are geographically closest are also karyotypically closest, in contrast to the classification proposed by Kellog and Goldman (Proc. United States Nat. Museum 96: 1-45,1944).

Keywords: Karyotype; Ateles paniscus paniscus; Cebidae; Primates.

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