FN variation was thought to correlate with geographic distribution and taxonomy. Differences in FN in Saimiri have traditionally been expressed as the number of acrocentric chromosomes, with five (FN = 78) to seven pairs (FN = 74). vanzolinii.Ĭytogenetic studies consistently showed that all Saimiri have a diploid number of 2n = 44, but can differ in fundamental numbers (FN, the number of chromosome arms) which range from 74 to 78 12. 3 presented a provisional taxonomy of seven Saimiri species and various subspecies: (1) S. In a recent molecular report on mitochondrial D-Loop and cyt b sequences, Alfaro et al. Even the number of species is uncertain, historically ranging from one to 16 distinguished species 4, 5, 6, 7, 8, 9, 10, 11. As for many other New World monkey (NWM) taxa the phylogenetic relationships within the genus Saimiri are still debated 3. They range from about 10°N to 17°S including the Amazon basin, the Guianas, and coastal zones of Central America 1, 2. Squirrel monkeys of the genus Saimiri (Cebidae, Platyrrhini) are medium sized neotropical primates inhabiting forest environments of South America. We conclude that CapA genomic distribution and its pervasiveness across Platyrrhini makes it an attractive cytogenetic marker for Saimiri and other New World monkeys. CapA is associated with non-pericentromeric heterochromatin and its distribution varies among Saimiri species. The alpha has high interspecific repeat homogeneity and was mapped to the centromeres of all analyzed species. The alpha sequences comprise about 1% and the CapA 2.2% of the S. We were able to identify two abundant satellite DNAs, alpha (~340 bp) and CapA (~1,500 bp), from short-read clustering of sequencing datasets from S. Our goal is to increase the pertinent karyological data by more fully characterizing satellite DNA sequences in the Saimiri genus. Repetitive sequences such as satellite DNAs are potentially informative cytogenetic markers because they display high evolutionary rates. All Saimiri species apparently have a diploid number of 2n = 44 but vary in the number of chromosome arms. ![]() ![]() ![]() The genus Saimiri is a decades-long taxonomic and phylogenetic puzzle to which cytogenetics has contributed crucial data.
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