Chromosomes of the Tan-Handed Titi (Callicebus torquatus, Hoffmannsegg, 1807)

Abstract
Two new specimens of Callicebus torquatus confirm the previously reported unusually low diploid number of 2n = 20. Banding studies and radioautography identify the X chromosome and compare the karyotype with that of Callicebus moloch cupreus. The latter species has considerably less C-banded heterochromatin. A comparison of Giemsa bands establishes only few comparable chromosome segments.

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