title: Dynamics of chromosomal evolution in the genus Hypsiboas (Anura: Hylidae).
abstract: Hylidae is one of the most species-rich families of anurans, and 40% of representatives in this group occur in Brazil. In spite of such remarkable diversity, little is known about this family and its taxonomical and systematic features. Most hylids have 2n = 24, even though most of the cytogenetic data are mainly obtained based on the conventional chromosomal staining and are available for only 16% of Hypsiboas species, a genus accounting for about 10% of the hylid diversity. In this study, cytogenetic data of distinct species and populations of Hypsiboas were analyzed, and the evolutionary dynamics of chromosomal macro- and microstructure of these amphibians were discussed. Contrary to the conservativeness of 2n = 24, this genus is characterized by a high variation of chromosomal morphology with as much as 8 karyotype patterns. Differences in the number and location of nucleolus organizer regions and C-bands allowed the identification of geographical variants within nominal species and cytotaxonomical chromosomal markers. Comparative analyses revealed a strong phylogeographic relationship between chromosomal patterns in this group.
authors.affiliation: Laboratório de Citogenética, Departamento de Ciências Biológicas, Universidade Estadual do Sudoeste da Bahia, Jequié, BA, Brasil peuamorim@gmail.com.
authors.forename: M A
authors.initials: MA
authors.lastname: Carvalho
authors.affiliation: Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, Brasil.
authors.forename: M T
authors.initials: MT
authors.lastname: Rodrigues
authors.affiliation: Laboratório de Citogenética, Departamento de Ciências Biológicas, Universidade Estadual do Sudoeste da Bahia, Jequié, BA, Brasil.
authors.forename: S
authors.initials: S
authors.lastname: Siqueira
authors.affiliation: Laboratório de Citogenética, Departamento de Ciências Biológicas, Universidade Estadual do Sudoeste da Bahia, Jequié, BA, Brasil.
authors.forename: C
authors.initials: C
authors.lastname: Garcia
mesh_terms: D000818:Animals; D001001:Anura / Q000235:genetics*; D002875:Chromosomes; D019143:Evolution, Molecular; D007621:Karyotyping; D013045:Species Specificity