Abstract
Holochilus sciureus (HSC) (2n = 56+1B, and FN = 56) belongs to the rodent tribe Oryzomyini, the most taxonomically diverse tribe of the Sigmodontinae subfamily. Cytogenetic studies on the Oryzomyini reflect such diversity revealing an exceptional range of karyotype variability. Comparative cytogenetics by Zoo-FISH on 15 Oryzomyini species using the entire chromosome set of HSC revealed a …