Karyotype description of five species of Trichomycterus (Teleostei: Siluriformes: Trichomycteridae)

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dc.contributor.authorSato, Luciana Ramos [UNESP]
dc.contributor.authorOliveira, Claudio [UNESP]
dc.contributor.authorForesti, Fausto [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:17:26Z
dc.date.available2014-05-20T15:17:26Z
dc.date.issued2004-01-01
dc.description.abstractTrichomycteridae is a family of small catfish which are widely distributed throughout Southern Central America and South America. The present study showed that the cis-Andean species Trichomycterus florensis, Trichomycterus sp. aff. Trichomycterus itatiyae, Trichomycterus reinhardti, Trichomycterus davisi and Trichomycterus auroguttatus had 2n = 54 chromosomes (42 metacentric, 10 submetacentric and 2 subtelocentric), with T. reinhardti, T. auroguttatus and T. sp. aff. T. itatiyae exhibiting only one chromosome pair with silver-stained nucleolus organizer regions (NORs). The cytogenetic data suggest the existence of at least two groups of species in the cis-Andean representatives of the genus Trichomycterus. In the first group the first metacentric pair is considerably larger than the second metacentric pair and the NORs occur in the pericentromeric position of the short arm of a large submetacentric pair while in the second group the first and second metacentric pairs are about the same size and larger than the other metacentric pairs and the NORs are located in the pericentromeric position of the long arm of a large metacentric pair. The relative conservatism of the karyotype of the cis-Andean Trichomycterus species contrasts with the wide diversification observed in the trans-Andean species, reinforcing the hypothesis that the genus is not monophyletic.en
dc.description.affiliationUniversidade Estadual Paulista Instituto de Biociências Departamento de Morfologia
dc.description.affiliationUnespUniversidade Estadual Paulista Instituto de Biociências Departamento de Morfologia
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent45-50
dc.identifierhttp://dx.doi.org/10.1590/S1415-47572004000100008
dc.identifier.citationGenetics and Molecular Biology. Sociedade Brasileira de Genética, v. 27, n. 1, p. 45-50, 2004.
dc.identifier.doi10.1590/S1415-47572004000100008
dc.identifier.fileS1415-47572004000100008.pdf
dc.identifier.issn1415-4757
dc.identifier.lattes0804793944846367
dc.identifier.scieloS1415-47572004000100008
dc.identifier.urihttp://hdl.handle.net/11449/30471
dc.language.isoeng
dc.publisherSociedade Brasileira de Genética
dc.relation.ispartofGenetics and Molecular Biology
dc.relation.ispartofjcr1.493
dc.relation.ispartofsjr0,638
dc.rights.accessRightsAcesso aberto
dc.sourceSciELO
dc.subjectchromosome evolutionen
dc.subjectNOR bandingen
dc.subjectfishen
dc.titleKaryotype description of five species of Trichomycterus (Teleostei: Siluriformes: Trichomycteridae)en
dc.typeArtigo
unesp.author.lattes0804793944846367
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

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Artigos - Morfologia - IBB