Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/19013
Título: Biflagellate spermatozoon of the poison-dart frogs Epipedobates femoralis and Colostethus sp. (Anura, Dendrobatidae)
Autor: Aguiar-Júnior, Odair
Garda, Adrian Antonio
Lima, Albertina Pimental
Colli, Guarino R.
Báo, Sônia N.
Pimentel, Shirlei Maria Recco
Palavras-chave: Animals
Microscopy, Electron
Flagellum
Frogs And Toads
Histology
Male
Spermatozoon
Ultrastructure
Animal
Anura
Flagella
Male
Microscopy, Electron
Spermatozoa
Anura
Colostethus
Dendrobatidae
Epipedobates
Epipedobates Femoralis
Leptodactylidae
Data do documento: 2003
Revista: Journal of Morphology
É parte de: Volume 255, Número 1, Pags. 114-121
Abstract: This study describes the spermatozoa of the dendrobatids Epipedobates femoralis and Colostethus sp. using light and transmission electron microscopy. Both species possess a biflagellate spermatozoon, an unusual characteristic only previously reported in two anuran species belonging to the families Leptodactylidae and Racophoridae. The acrosomal complex of both species consists of a conical acrosomal vesicle and a subacrosomal cone, both of which cover the anterior portion of the nucleus, but to differing extents. In the midpiece, the centrioles are disposed parallel to each other and to the cell axis and give rise to two axonemes. Two paraxonemal rods were also seen entering the nuclear fossa. Both flagella are surrounded by a single mitochondrial collar. Each flagellum is formed by an axial fiber connected to the axoneme by an axial sheath; juxta-axonemal fibers are absent. Our data seem to support that Epipedobates femoralis should be placed in a separate clade possibly related to Colosthetus and that these two genera may not be monophyletic. © 2002 Wiley-Liss, Inc.
DOI: 10.1002/jmor.10052
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