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dc.contributor.authorOliveira, Renildo Ribeiro de-
dc.contributor.authorSouza, Issakar Lima-
dc.contributor.authorVenere, Paulo Cesar-
dc.date.accessioned2020-04-24T16:55:31Z-
dc.date.available2020-04-24T16:55:31Z-
dc.date.issued2006-
dc.identifier.urihttps://repositorio.inpa.gov.br/handle/1/14634-
dc.description.abstractThe neotropical freshwater systems have a high number of catfish species (Siluriformes), and many of those are denominated "cascudos" in Brazil. Cytogenetic data about three "cascudos" species fished in the rio Araguaia are described in the present study. The Pterygoplichthys joselimaianus showed 2n=52, with 28 metacentrics (M) chromosomes, 16 submetacentrics (SM) and 8 subtelocentrics/acrocentrics (ST/A) in both sexes. Hemiancistrus spinosissimus showed 2n=52, with karyotype formulae 26M+22SM+4ST, in both sexes. Hemiancistrus spilomma also showed 2n=52, but in this species a ZZ/ZW sex chromosome system (25M+21SM+6ST in females and 24M+22SM+6ST in males) was observed. The cells from H. spinosissimus and P. joselimaianus showed one chromosome pair bearing Ag-NORs, while in the H. spilomma three chromosome pairs bearing Ag-NORs were detected. The data showed in this work reveal particular chromosomal characteristics, important for a good recognition of both Hemincistrus species, and also show the importance of the insertion of cytogenetic data on taxonomic phylogenetic studies. Copyright © 2006 Sociedade Brasileira de Ictiologia.en
dc.language.isoenpt_BR
dc.relation.ispartofVolume 4, Número 1, Pags. 93-97pt_BR
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/br/*
dc.subjectHemiancistrusen
dc.subjectLoricariidaeen
dc.subjectPterygoplichthysen
dc.subjectSiluriformesen
dc.titleKaryotype description of three species of Loricariidae (Siluriformes) and occurrence of the ZZ/ZW sexual system in Hemiancistrus spilomma Cardoso & Lucinda, 2003en
dc.typeArtigopt_BR
dc.identifier.doi10.1590/S1679-62252006000100010-
dc.publisher.journalNeotropical Ichthyologypt_BR
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