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	Provedor de dados Zoologia (1) Neotropical Ichthyology (1) Autor Azevedo,Carlos (1) Baicere-Silva,Clarianna Martins (1) Benine,Ricardo C. (1) Corral,Laura (1) Matos,Edilson (1) Matos,Patrícia (1) Quagio-Grassiotto,Irani (1) Mais... Palavra-chave Spermatozoa ultrastructure (2) Astyanax clade (1) Clade A (1) Crustacea (1) Ocypodidae (1) Spermiogenesis (1) Ucides cordatus (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2011 (1) 2000 (1) País Brazil (2) Idioma Inglês (1) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Markiana nigripinnis (Perugia, 1891) as a putative member of the subfamily Stevardiinae (Characiformes: Characidae): spermatic evidence Neotropical Ichthyology Baicere-Silva,Clarianna Martins; Benine,Ricardo C.; Quagio-Grassiotto,Irani. The genus Markiana was until recently recognized as incertae sedis in the family Characidae, even though alternative placements for this genus have been advanced since its original description. More recently, it was hypothesized that Markiana nigripinnis is part of a clade informally named the Astyanax clade, indicating the putative close relationship of Markiana with the genus Astyanax. Examination of sperm ultrastructure of representatives of Astyanax and M. nigripinnis shows no evidence for this hypothesized close relationship. Rather, the spermatozoa of M. nigripinnis share characters found in spermatozoa of the non-inseminating members of the subfamily Stevardiinae, such as an angle of nuclear rotation equal to 85º resulting in a lateral position of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Astyanax clade; Clade A; Spermiogenesis; Spermatozoa ultrastructure. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000200015 Ultraestrutura do espermatozóide de Ucides cordatus Linnaeus (Crustacea, Ocypodidae) do litoral norte do Brasil Zoologia Matos,Edilson; Matos,Patrícia; Corral,Laura; Azevedo,Carlos. Ultrastructure of spermatozoa of the crab Ucides cordatus Linnaeus, 1763 is described and illustrated. Three parts can be distinguished: 1. the elongate-ovoid acrosome located anteriorly; 2. the cytoplasmic region; and 3. the nuclear region. The acrosome is composed of a thick electron-dense wall and a less electron-dense subacrosomal space. The cytoplasm region connects the acrosome with the nucleus, and three arms filled with microtubules arise from this region. The nucleus is polymorphous. The spermatozoon of Ucides cordatus follows the general pattern described for other Decapods. Tipo: Info:eu-repo/semantics/article Palavras-chave: Crustacea; Ocypodidae; Ucides cordatus; Spermatozoa ultrastructure. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000300020 Registros recuperados: 2 Primeira ... 1 ... Última

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