THE Y-AUTOSOME TRANSLOCATION OF CALLIMICO-GOELDII

Intraspecific chromosomal variability is common among New World primat es. A polymorphism has been described among male Callimico goeldii in which the Y chromosome is translocated to an autosome. Consequently, m ales may have a chromosome number of 47 or 48. We describe the results of karyotypic analyses on 40 captive male C. goeldii. Thirty-nine of them had a diploid chromosome number of 47, including the Y-autosome t ranslocation. The remaining male had 48 chromosomes; however, he too c arried the translocation along with two X chromosomes. The reported Y- chromosome translocation in Callimico goeldii appears not to be a poly morphism but, instead, a feature characteristic of all males in the po pulation.