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CYTOGENETIC ANALYSIS OF FOUR POISON FROGS OF THE EPIPEDOBATES GENUS (ANURA: DENDROBATIDAE)

Aguiar, Odair ; Lima, Albertina P. ; Giaretta, Ariovaldo A. ; Recco-Pimentel, Shirlei M.

Herpetologica, 2002-09, Vol.58 (3), p.293-303 [Periódico revisado por pares]

Herpetologists' League

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  • Título:
    CYTOGENETIC ANALYSIS OF FOUR POISON FROGS OF THE EPIPEDOBATES GENUS (ANURA: DENDROBATIDAE)
  • Autor: Aguiar, Odair ; Lima, Albertina P. ; Giaretta, Ariovaldo A. ; Recco-Pimentel, Shirlei M.
  • Assuntos: Amphibians ; Biological taxonomies ; Boggarts ; C-banding ; Chromosomes ; Cytogenetics ; Dendrobatidae ; Epipedobates ; Evolution ; Frogs ; Herpetology ; Heterochromatin ; NOR ; Nucleolus organizer region ; Poisons
  • É parte de: Herpetologica, 2002-09, Vol.58 (3), p.293-303
  • Descrição: We determined the overall karyotypic structure, positions of NORs, as well as the distribution of constitutive heterochromatin for Epipedobates flavopictus, E. trivittatus, E. femoralis, and E. hahneli. Despite a conserved chromosome number (2N = 24), morphological differences were seen in the group of small chromosomes. Epipedobates femoralis presented a distinctive karyotype compared to the other species analyzed. All species examined had NORs on different chromosomes. The C-banding pattern showed a considerable variation among the species. Epipedobates flavopictus is remarkably different from the others in possessing only centromeric C-bands. The distribution of heterochromatin varied among species and seems to evolve as a species-specific trait. We suggest that NOR location variability indicates that some rearrangement mechanisms have taken place during the evolutionary history of this group, because Dendrobatidae is considered a monophyletic taxon. We do not discard that some general pattern in either C-band or NOR location, or both, may emerge when more species of this genus are analyzed.
  • Editor: Herpetologists' League
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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