Chromosomal Variations in the Primate Alouatta seniculus seniculus

Abstract

Chromosome analysis in 23 specimens of A. s. seniculus, trapped in different localities of Colombia were examined with the C- and Q-banding techniques. The chromosome number (2n = 44) showed variations from 2n = 43 to 2n = 45 involving 3 and 5 microchromosomes, respectively. Two specimens also showed a structural chromosome variation involving a pericentric inversion of the chromosome No. 13. Chromosome measurements revealed an X chromosome with a value significantly smaller to that established for the standard mammalian X chromosome.