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Title: Sperm morphology of five species of Colostethus (Anura, Dendrobatidae) from Brazil, with phylogenetic comments
Authors: Veiga-Menoncello, Ana Cristina Prado
Lima, Albertina Pimental
Pimentel, Shirlei Maria Recco
Keywords: Frog
South America
Colostethus Brunneus
Colostethus Nidicola
Colostethus Stepheni
Issue Date: 2006
metadata.dc.publisher.journal: Acta Zoologica
metadata.dc.relation.ispartof: Volume 87, Número 2, Pags. 147-157
Abstract: We describe the sperm ultrastructure of five species of Colostethus from Brazil. The general structures of the spermatozoa (acrosomal complex and flagellar apparatus) were similar to species within the Bufonoidea. Colostethus brunneus, Colostethus sp. (aff. trilineatus), Colostethus nidicola and Colostethus sp. had biflagellated spermatozoa, whereas the spermatozoa of Colostethus stepheni had a single flagellum, a characteristic previously unknown for this genus. In addition, the spermatozoa of this species showed some mitochondria within the thick, undulating membrane. These characteristics are apparently common to dendrobatid species that have a single flagellum. Based on these findings, we tentatively consider biflagellarity to be an apomorphic condition in the Dendrobatidae. In addition, the results described here do not support the proposed regrouping of the 'brunneus' and 'alagoanus' groups in a monophyletic 'trilineatus' group. © 2006 The Royal Swedish Academy of Sciences.
metadata.dc.identifier.doi: 10.1111/j.1463-6395.2006.00229.x
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