| cytogenetics of vesper mice, calomys (sigmodontinae): a new karyotype from the puna region and its implication for chromosomal phylogeny. | the karyotype of specimens identified as calomys lepidus, trapped at 3600 m above sea level in the puna region, northwestern argentina, was studied. all specimens analysed showed a 2n = 44 (nf(a) = 68) asymmetrical karyotype with 13 pairs of metacentric/submetacentric autosomes and 7 pairs of telocentric chromosomes. the x was a medium-sized submetacentric and the y a small submetacentric chromosome. this karyotype was quite different from that previously described for c. lepidus from peru (2n = ... | 1997 | 19492477 |