title: Heteromorphic Z and W sex chromosomes in Physalaemus ephippifer (Steindachner, 1864) (Anura, Leiuperidae).
abstract: Heteromorphisms between sex chromosomes are rarely found in anurans and sex chromosome differentiation is considered to be a set of recent recurrent events in the evolutionary history of this group. This paper describes for the first time heteromorphic sex chromosomes Z and W in the leiuperid genus Physalaemus. They were found in P. ephippifer, a species of the P. cuvieri group, and corresponded to the eighth pair of its karyotype. The W chromosome differed from the Z chromosome by the presence of an additional segment in the short arm, composed of a distal NOR and an adjacent terminal DAPI-positive C-band. The identification of this sex chromosome pair may help in future investigations into the sex determining genes in the genus Physalaemus.
authors.affiliation: Departamento de Anatomia, Biologia Celular, Fisiologia e Biofísica, Instituto de Biologia, Universidade Estadual de Campinas-UNICAMP, 6109, 13083-863 Campinas, São Paulo, Brazil.
authors.forename: Juliana
authors.initials: J
authors.lastname: Nascimento
authors.forename: Yeda Rumi Serra Douglas
authors.initials: YR
authors.lastname: Quinderé
authors.forename: Shirlei Maria
authors.initials: SM
authors.lastname: Recco-Pimentel
authors.forename: Janaína Reis Ferreira
authors.initials: JR
authors.lastname: Lima
authors.forename: Luciana Bolsoni
authors.initials: LB
authors.lastname: Lourenço
mesh_terms: D000818:Animals; D001001:Anura / Q000235:genetics*; D005075:Biological Evolution; D002871:Chromosome Banding; D005260:Female; D006570:Heterochromatin / Q000235:genetics*; D007621:Karyotyping; D008297:Male; D012730:Sex Chromosomes
chemical_list: D006570:Heterochromatin