Heteromorphic Z and W sex chromosomes in Physalaemus ephippifer (Steindachner, 1864) (Anura, Leiuperidae) |
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| Authors: | Juliana Nascimento Yeda Rumi Serra Douglas Quinderé Shirlei Maria Recco-Pimentel Janaína Reis Ferreira Lima Luciana Bolsoni Lourenço |
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| Affiliation: | 1. Departamento de Anatomia, Biologia Celular, Fisiologia e Biofísica, Instituto de Biologia, Universidade Estadual de Campinas—UNICAMP, 6109, 13083-863, Campinas, S?o Paulo, Brazil
2. Instituto de Pesquisas Científicas e Tecnlógicas do Amapá-IEPA, Núcleo de Zoologia, Macapá, Amapá, Brazil
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| 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. |
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