Taxonomic review and comparative morphology of the species of the genus Isistius Gill, 1864 (Chondrichthyes, Squaliformes: Dalatiidae)

Detalhes bibliográficos
Autor(a) principal: Petean, Flávia de Figueiredo
Data de Publicação: 2015
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Biblioteca Digital de Teses e Dissertações da USP
Texto Completo: http://www.teses.usp.br/teses/disponiveis/41/41133/tde-19052015-112215/
Resumo: The genus Isistius Gill, 1864, which belongs to the family Dalatiidae, currently has three valid species: Isistius brasiliensis Quoy & Gaimard, 1824, I. plutodus Garrick & Springer, 1964 and I. labialis Meng, Zhu & Li, 1985. The most common species, I. brasiliensis, has a wide geographic distribution, and can be found in subtemperate and tropical seas; a comparative analysis of specimens from different localities has never been done. This study has thoroughly analyzed the morphological variation of this species along its distribution, elucidating that it represents only one species, and I. labialis becomes a junior synonym. The other species, I. plutodus, is known from only few specimens, raising doubts about their validity since I. brasiliensis is widely distributed. A detailed comparative analysis of these individuals was undertaken to test the validity of this species. The representatives of all the nominal species within Isistius were studied, identifying them morphologically and re-describing them through more precise characters. Therefore, this study analyzed minutely the external morphology, such as coloration, dentition, dermal denticles, body proportions, and internal morphology, such as the skeleton and musculature, of the known species, also covering morphometric and meristic aspects, to better define the genus and provide relevant morphological subsidies that may integrate future phylogenetic analysis of genera within the family
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spelling Taxonomic review and comparative morphology of the species of the genus Isistius Gill, 1864 (Chondrichthyes, Squaliformes: Dalatiidae)Revisão taxonômica e morfologia comparada das espécies do gênero Isistius Gill, 1864 (Chondrichthyes: Squaliformes: Dalatiidae)AnatomiaAnatomyCookiecutter sharkMorfometriaMorphometricsRe-descriçãoRedescriptionTubarão charutoThe genus Isistius Gill, 1864, which belongs to the family Dalatiidae, currently has three valid species: Isistius brasiliensis Quoy & Gaimard, 1824, I. plutodus Garrick & Springer, 1964 and I. labialis Meng, Zhu & Li, 1985. The most common species, I. brasiliensis, has a wide geographic distribution, and can be found in subtemperate and tropical seas; a comparative analysis of specimens from different localities has never been done. This study has thoroughly analyzed the morphological variation of this species along its distribution, elucidating that it represents only one species, and I. labialis becomes a junior synonym. The other species, I. plutodus, is known from only few specimens, raising doubts about their validity since I. brasiliensis is widely distributed. A detailed comparative analysis of these individuals was undertaken to test the validity of this species. The representatives of all the nominal species within Isistius were studied, identifying them morphologically and re-describing them through more precise characters. Therefore, this study analyzed minutely the external morphology, such as coloration, dentition, dermal denticles, body proportions, and internal morphology, such as the skeleton and musculature, of the known species, also covering morphometric and meristic aspects, to better define the genus and provide relevant morphological subsidies that may integrate future phylogenetic analysis of genera within the familyO gênero Isistius Gill, 1864, pertencente à família Dalatiidae, atualmente apresenta três espécies válidas: Isistius brasiliensis Quoy & Gaimard, 1824, I. plutodus Garrick & Springer, 1964 e I. labialis, Meng, Zhu & Li, 1985. A espécie mais comum, I. brasiliensis, tem uma ampla distribuição geográfica e pode ser encontrada em mares subtemperados e tropicais; uma análise comparativa detalhada de exemplares provenientes de diferentes localidades nunca foi feita. Este estudo examinou detalhadamente a variação morfológica desta espécie ao longo de sua distribuição, elucidando que ela representa apenas uma espécie, além de I. labialis ter se tornado um sinônimo júnior. A outra espécie, I. plutodus, é conhecida apenas por alguns exemplares, levantando dúvidas acerca de sua validade, dado que I. brasiliensis é amplamente distribuído. Foi feita uma análise comparativa detalhada destes indivíduos a fim de testar a validade da espécie. Estudaram-se representantes de todas as espécies nominais de Isistius, identificando-os morfologicamente e os redescrevendo através de caracteres mais precisos. Assim, este estudo analisou detalhadamente a morfologia externa, como coloração, dentição, dentículos dérmicos, proporções corporais, e interna, como esqueleto e musculatura, das espécies conhecidas além de examinar aspectos morfométricos e merísticos que auxiliaram na melhor definição do gênero e forneceram subsídios morfológicos relevantes que podem integrar futuras análises filogenéticas dentro da famíliaBiblioteca Digitais de Teses e Dissertações da USPCarvalho, Marcelo Rodrigues dePetean, Flávia de Figueiredo2015-01-27info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://www.teses.usp.br/teses/disponiveis/41/41133/tde-19052015-112215/reponame:Biblioteca Digital de Teses e Dissertações da USPinstname:Universidade de São Paulo (USP)instacron:USPLiberar o conteúdo para acesso público.info:eu-repo/semantics/openAccesseng2020-05-18T16:00:05Zoai:teses.usp.br:tde-19052015-112215Biblioteca Digital de Teses e Dissertaçõeshttp://www.teses.usp.br/PUBhttp://www.teses.usp.br/cgi-bin/mtd2br.plvirginia@if.usp.br|| atendimento@aguia.usp.br||virginia@if.usp.bropendoar:27212020-05-18T16:00:05Biblioteca Digital de Teses e Dissertações da USP - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Taxonomic review and comparative morphology of the species of the genus Isistius Gill, 1864 (Chondrichthyes, Squaliformes: Dalatiidae)
Revisão taxonômica e morfologia comparada das espécies do gênero Isistius Gill, 1864 (Chondrichthyes: Squaliformes: Dalatiidae)
title Taxonomic review and comparative morphology of the species of the genus Isistius Gill, 1864 (Chondrichthyes, Squaliformes: Dalatiidae)
spellingShingle Taxonomic review and comparative morphology of the species of the genus Isistius Gill, 1864 (Chondrichthyes, Squaliformes: Dalatiidae)
Petean, Flávia de Figueiredo
Anatomia
Anatomy
Cookiecutter shark
Morfometria
Morphometrics
Re-descrição
Redescription
Tubarão charuto
title_short Taxonomic review and comparative morphology of the species of the genus Isistius Gill, 1864 (Chondrichthyes, Squaliformes: Dalatiidae)
title_full Taxonomic review and comparative morphology of the species of the genus Isistius Gill, 1864 (Chondrichthyes, Squaliformes: Dalatiidae)
title_fullStr Taxonomic review and comparative morphology of the species of the genus Isistius Gill, 1864 (Chondrichthyes, Squaliformes: Dalatiidae)
title_full_unstemmed Taxonomic review and comparative morphology of the species of the genus Isistius Gill, 1864 (Chondrichthyes, Squaliformes: Dalatiidae)
title_sort Taxonomic review and comparative morphology of the species of the genus Isistius Gill, 1864 (Chondrichthyes, Squaliformes: Dalatiidae)
author Petean, Flávia de Figueiredo
author_facet Petean, Flávia de Figueiredo
author_role author
dc.contributor.none.fl_str_mv Carvalho, Marcelo Rodrigues de
dc.contributor.author.fl_str_mv Petean, Flávia de Figueiredo
dc.subject.por.fl_str_mv Anatomia
Anatomy
Cookiecutter shark
Morfometria
Morphometrics
Re-descrição
Redescription
Tubarão charuto
topic Anatomia
Anatomy
Cookiecutter shark
Morfometria
Morphometrics
Re-descrição
Redescription
Tubarão charuto
description The genus Isistius Gill, 1864, which belongs to the family Dalatiidae, currently has three valid species: Isistius brasiliensis Quoy & Gaimard, 1824, I. plutodus Garrick & Springer, 1964 and I. labialis Meng, Zhu & Li, 1985. The most common species, I. brasiliensis, has a wide geographic distribution, and can be found in subtemperate and tropical seas; a comparative analysis of specimens from different localities has never been done. This study has thoroughly analyzed the morphological variation of this species along its distribution, elucidating that it represents only one species, and I. labialis becomes a junior synonym. The other species, I. plutodus, is known from only few specimens, raising doubts about their validity since I. brasiliensis is widely distributed. A detailed comparative analysis of these individuals was undertaken to test the validity of this species. The representatives of all the nominal species within Isistius were studied, identifying them morphologically and re-describing them through more precise characters. Therefore, this study analyzed minutely the external morphology, such as coloration, dentition, dermal denticles, body proportions, and internal morphology, such as the skeleton and musculature, of the known species, also covering morphometric and meristic aspects, to better define the genus and provide relevant morphological subsidies that may integrate future phylogenetic analysis of genera within the family
publishDate 2015
dc.date.none.fl_str_mv 2015-01-27
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
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dc.identifier.uri.fl_str_mv http://www.teses.usp.br/teses/disponiveis/41/41133/tde-19052015-112215/
url http://www.teses.usp.br/teses/disponiveis/41/41133/tde-19052015-112215/
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv
dc.rights.driver.fl_str_mv Liberar o conteúdo para acesso público.
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Liberar o conteúdo para acesso público.
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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dc.publisher.none.fl_str_mv Biblioteca Digitais de Teses e Dissertações da USP
publisher.none.fl_str_mv Biblioteca Digitais de Teses e Dissertações da USP
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reponame:Biblioteca Digital de Teses e Dissertações da USP
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
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reponame_str Biblioteca Digital de Teses e Dissertações da USP
collection Biblioteca Digital de Teses e Dissertações da USP
repository.name.fl_str_mv Biblioteca Digital de Teses e Dissertações da USP - Universidade de São Paulo (USP)
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