Conserved karyotypes in Cophomantini: Cytogenetic analysis of 12 species from three species groups of Bokermannohyla (Amphibia: Anura: Hylidae)

FERREIRA CATROLI, G.; FAIVOVICH, J.; HADDAD, C. F. B.; KASAHARA, S.

JOURNAL OF HERPETOLOGY

SOC STUDY AMPHIBIANS REPTILES

Año: 2011 vol. 45 p. 120 - 128

0022-1511

Bokermannohyla is one of the five genera included in the recently recognized tribe Cophomantini, of the hylid frog subfamily Hylinae. While karyotypic diversity is relatively well known in two genera of Cophomantini, Aplastodiscus and Hypsiboas, in Bokermannohyla chromosome data are restricted to only two of its 28 species. In this paper we describe the karyotypes of 12 species of Bokermannohyla using standard staining, Ag-NOR, C-banding, DAPI, CMA3, and BrdU incorporation. The 12 species share a similar diploid karyotype with 2n=24 biarmed chromosomes; most observed differences involved the NOR-bearing chromosomes, position within this chromosome, and C-banding patterns. The overall similarity of these karyotypes with those of Aplastodiscus and Hypsiboas widens the notion of remarkable morphological homogeneity among Cophomantini karyotypes. The results obtained so far are promising for comparative studies on the genus Bokermannohyla, and, in a wider sense, will allow a better understanding of karyotype differentiation and chromosomal evolution in Cophomantini.