Please use this identifier to cite or link to this item:
Title: Sperm ultrastructure of the Brazilian Amazon poison frogs Epipedobates trivittatus and Epipedobates hahneli (Anura, Dendrobatidae)
Authors: Aguiar-Júnior, Odair
Lima, Albertina Pimental
Báo, Sônia N.
Pimentel, Shirlei Maria Recco
Keywords: Frog
Epipedobates Hahneli
Epipedobates Trivittatus
Issue Date: 2004
metadata.dc.publisher.journal: Acta Zoologica
metadata.dc.relation.ispartof: Volume 85, Número 1, Pags. 21-28
Abstract: The sperm ultrastructure of Epipedobates trivittatus and E. hahneli is described. The spermatological characteristics are identical in both species, except for the extension of the acrosomal vesicle. The structure of the acrosomal complex is shared with species of the Bufonoidea neobatrachian lineage, which differs from the condition observed in species included in the ranoid lineage.The phylogenetic significance of the mitochondrial collar, also seen in Eubufonoidea groups, is still unclear. Also the significance of the alternative mitochondrial arrangement seen here is unclear. The perpendicular arrangement of the centrioles is also shared with the Bufonoidea and is considered a synapomorphic condition. An expanded undulating membrane and the absence of a juxtaxonemal fibre appear to be apomorphic characteristics of dendrobatid species, as also observed (homoplastically) for species of Litoria and Cyclorana. However, the notable expansion of the undulating membrane appears to be an autapomorphy of Dendrobatidae frogs. The ultrastructural data presented here do not support the proposed placement of E. trivittatus in a separate genus.
metadata.dc.identifier.doi: 10.1111/j.0001-7272.2004.00154.x
Appears in Collections:Artigos

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.