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A new karyotype of Cebus apella (Cebidae, Platyrrhini) from Argentina

Marta Mudry^I; Irma Slavutsky^I; Gabriel Zunino^II; Alejandra Delprat^I; Alejandro Brown^III

^ISección Citogenética, Instituto de Investigaciones Hematológicas "M.R. Castes", Academia Nacional de Medicina, Pacheco de Melo 3081, 1425 Buenos Aires, Argentina. Send correspondence to M.M.
^IICentro Argentino de Primates (CAPRIM), Corrientes, Argentina
^IIIEscuela Superior de Bosques, Universidad Nacional de la Plata - UNLP, Argentina

ABSTRACT

Blood samples of three wild specimens of Cebus apella (2n = 54) from NE Argentina that were identified as C. apella vellerosus were analyzed. The G banding pattern was similar to C. apella paraguayanus except for pair 11. C banded karyotypes showed the loss of the large heterochromatic block of pair 11, charactenstic of other subspecies of C. apella. ?airs 3, J, 12, 13 and 19 conserved the variably sized intercalar bands which occur in other C. apella. Chromosomes 17 and 20 showed inconsistent heterochromatic blocks. Ag-NOR bands were studied in one individual and three positive NORs corresponding to the secondary constrictions of pairs 22 and 23 were observed. The finding of a new karyotype associated with a particular phenotype and geographic range confirms that C. apella is not karyologically uniform and shows variations at the subspecies level.

Keywords: Karyotype; Cebus apella; Cebidae; Platyrrhini.

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