Chromosome banding patterns and nucleolar organizing regions in three species of Callithricidae (Saguinus oedipus, Saguinus fuscicollis, and Callithrix jacchus).

Chromosome complements of three species of Callithricidae, Saguinus oedipus, Saguinus fuscicollis and Callithrix jacchus, were analyzed by various banding techniques. Morphometric data are presented. A diploid chromosome number of 2n = 46 is reconfirmed for all three species. Several interesting interspecies chromosomal variations were demonstrated by G- and C-band patterns. Active nucleolar organizing regions (NORs) were revealed by the Ag-AS silver histochemical stain.