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dc.contributor.authorSpadella, Maria Angelica
dc.contributor.authorOliveira, Claudio [UNESP]
dc.contributor.authorQuagio-Grassiotto, Irani
dc.date.accessioned2014-05-20T15:23:13Z
dc.date.available2014-05-20T15:23:13Z
dc.date.issued2006-08-01
dc.identifierhttp://dx.doi.org/10.1007/s00435-006-0018-9
dc.identifier.citationZoomorphology. New York: Springer, v. 125, n. 3, p. 135-145, 2006.
dc.identifier.issn0720-213X
dc.identifier.urihttp://hdl.handle.net/11449/34044
dc.description.abstractIn the present study spermiogenesis was investigated in Cetopsis coecutiens (Cetopsidae), and Bunocephalus amazonicus (Aspredinidae), while spermatozoa ultrastructure was investigated in C. coecutiens, B. amazonicus, and Nematogenys inermis (Nematogenyidae). Aspredinidae and Cetopsidae share a spermatogenesis of the semicystic type, and a particular type of spermiogenesis process not reported in any fish group. In the three species analyzed, spermatozoa are biflagellate with flagella having the classical axoneme formulae (9 + 2). The analysis of thirteen characters showed the presence of eight characters shared by Cetopsidae and Aspredinidae, and six characters shared by Cetopsidae and Nematogenyidae, which may suggest that these three families may be more related than actually hypothesized, comprising a very primitive siluriform lineage originated after Diplomystidae.en
dc.format.extent135-145
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofZoomorphology
dc.sourceWeb of Science
dc.subjectfish evolutionpt
dc.subjectcatfishpt
dc.subjectspermpt
dc.subjectsemicystic spermatogenesispt
dc.subjectmorphologypt
dc.titleOccurrence of biflagellate spermatozoa in Cetopsidae, Aspredinidae, and Nematogenyidae (Teleostei : Ostariophysi : Siluriformes)en
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
dc.contributor.institutionFaculdade de Medicina de Marília (FAMEMA)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationFac Med Marilia, BR-17519030 Marilia, SP, Brazil
dc.description.affiliationUniv Estadual Campinas, Inst Biol, Dept Biol Celular, BR-13084971 Campinas, SP, Brazil
dc.description.affiliationUnespDepartamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista, Campus de Botucatu.
dc.identifier.doi10.1007/s00435-006-0018-9
dc.identifier.wosWOS:000239302000003
dc.rights.accessRightsAcesso restrito
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Biociências, Botucatupt
dc.relation.ispartofjcr1.400
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