title: The karyotype of Cacajao melanocephalus (Platyrrhini, Primates).
abstract: Chromosome studies were performed in a male representative of Cacajao melanocephalus. The diploid number was 45: the chromosome complement consisting of 12 pairs of acrocentric autosomes, 9 pairs of biarmed autosomes and 1 heteromorphic pair composed of one subtelocentric and one acrocentric chromosome. The X chromosome was submetacentric and the Y chromosome was apparently translocated to an acrocentric autosome. G-banding patterns were studied and the results compared to karyotypes previously described for Cacajao rubicundus and Cacajao calvus.
mesh_terms: D000818:Animals; D002427:Cebidae / Q000235:genetics*; D004171:Diploidy; D005260:Female; D007621:Karyotyping; D008297:Male; D014960:X Chromosome; D014998:Y Chromosome