Morphologic changes of Paleozoic and Mesozoic insect faunas from Argentina and Brazil: paleoecologic aspects

Autores
Vaz Tassi, Lara; Martins Neto, Rafael G.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
During the Permian-Triassic transition, the insect faunas from all over the world suffered changes related to their diversity and abundance, as well as to their morphometric patterns. The data were obtained from the original descriptions of each species. The total size of wing was considered, whereas the small fragments without estimative total size were not taken into account. The morphometric analysis of the recorded species of the Carboniferous- Permian-Triassic entomofauna from Argentina and Brazil shows a morphologic change that reflects a general trend of body size reduction. The groups that showed an inverse trend were Mecopteroidea and Coleoptera. The statistical analysis demonstrated a decreasing trend of the wing size of Paleoptera, Orthopteroidea, Blattopteromorpha and Hemipteroidea from Paleozoic to Mesozoic. Decreasing or increasing trends could be directly related with climate changes occurred during Permian-Triassic times. These changes could have caused ecologic nanism or gigantism, connected to food availability or other synergetic factors. A high gradient of temperature provides ideal conditions to a big rate of insect proliferation, supporting its diversity, while the extinctions are associated to environmental catastrophic events. At first sight, it could be interpreted that the trend of decreasing insect dimensions reflects the high levels of environmental stress already documented in the literature. However, alochronic speciation, as a result of ecologic nanism or gigantism, should also be considered when the real diversity of Permian-Triassic boundary insects is analysed.
Simposio III: Ecosistemas triásicos, su paleobiología y el contexto de recuperación de la gran extinción
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Paleontología
Paleozoic
Mesozoic
Insect faunas
Argentina
Brazil
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/16658
Acceder
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network_name_str SEDICI (UNLP)
spelling Morphologic changes of Paleozoic and Mesozoic insect faunas from Argentina and Brazil: paleoecologic aspectsVaz Tassi, LaraMartins Neto, Rafael G.Ciencias NaturalesPaleontologíaPaleozoicMesozoicInsect faunasArgentinaBrazilDuring the Permian-Triassic transition, the insect faunas from all over the world suffered changes related to their diversity and abundance, as well as to their morphometric patterns. The data were obtained from the original descriptions of each species. The total size of wing was considered, whereas the small fragments without estimative total size were not taken into account. The morphometric analysis of the recorded species of the Carboniferous- Permian-Triassic entomofauna from Argentina and Brazil shows a morphologic change that reflects a general trend of body size reduction. The groups that showed an inverse trend were Mecopteroidea and Coleoptera. The statistical analysis demonstrated a decreasing trend of the wing size of Paleoptera, Orthopteroidea, Blattopteromorpha and Hemipteroidea from Paleozoic to Mesozoic. Decreasing or increasing trends could be directly related with climate changes occurred during Permian-Triassic times. These changes could have caused ecologic nanism or gigantism, connected to food availability or other synergetic factors. A high gradient of temperature provides ideal conditions to a big rate of insect proliferation, supporting its diversity, while the extinctions are associated to environmental catastrophic events. At first sight, it could be interpreted that the trend of decreasing insect dimensions reflects the high levels of environmental stress already documented in the literature. However, alochronic speciation, as a result of ecologic nanism or gigantism, should also be considered when the real diversity of Permian-Triassic boundary insects is analysed.Simposio III: Ecosistemas triásicos, su paleobiología y el contexto de recuperación de la gran extinciónFacultad de Ciencias Naturales y Museo2010info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionResumenhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/16658enginfo:eu-repo/semantics/altIdentifier/isbn/978-987-95849-7-2info:eu-repo/semantics/reference/hdl/10915/25738info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T10:52:58Zoai:sedici.unlp.edu.ar:10915/16658Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 10:52:58.44SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Morphologic changes of Paleozoic and Mesozoic insect faunas from Argentina and Brazil: paleoecologic aspects
title Morphologic changes of Paleozoic and Mesozoic insect faunas from Argentina and Brazil: paleoecologic aspects
spellingShingle Morphologic changes of Paleozoic and Mesozoic insect faunas from Argentina and Brazil: paleoecologic aspects
Vaz Tassi, Lara
Ciencias Naturales
Paleontología
Paleozoic
Mesozoic
Insect faunas
Argentina
Brazil
title_short Morphologic changes of Paleozoic and Mesozoic insect faunas from Argentina and Brazil: paleoecologic aspects
title_full Morphologic changes of Paleozoic and Mesozoic insect faunas from Argentina and Brazil: paleoecologic aspects
title_fullStr Morphologic changes of Paleozoic and Mesozoic insect faunas from Argentina and Brazil: paleoecologic aspects
title_full_unstemmed Morphologic changes of Paleozoic and Mesozoic insect faunas from Argentina and Brazil: paleoecologic aspects
title_sort Morphologic changes of Paleozoic and Mesozoic insect faunas from Argentina and Brazil: paleoecologic aspects
dc.creator.none.fl_str_mv Vaz Tassi, Lara
Martins Neto, Rafael G.
author Vaz Tassi, Lara
author_facet Vaz Tassi, Lara
Martins Neto, Rafael G.
author_role author
author2 Martins Neto, Rafael G.
author2_role author
dc.subject.none.fl_str_mv Ciencias Naturales
Paleontología
Paleozoic
Mesozoic
Insect faunas
Argentina
Brazil
topic Ciencias Naturales
Paleontología
Paleozoic
Mesozoic
Insect faunas
Argentina
Brazil
dc.description.none.fl_txt_mv During the Permian-Triassic transition, the insect faunas from all over the world suffered changes related to their diversity and abundance, as well as to their morphometric patterns. The data were obtained from the original descriptions of each species. The total size of wing was considered, whereas the small fragments without estimative total size were not taken into account. The morphometric analysis of the recorded species of the Carboniferous- Permian-Triassic entomofauna from Argentina and Brazil shows a morphologic change that reflects a general trend of body size reduction. The groups that showed an inverse trend were Mecopteroidea and Coleoptera. The statistical analysis demonstrated a decreasing trend of the wing size of Paleoptera, Orthopteroidea, Blattopteromorpha and Hemipteroidea from Paleozoic to Mesozoic. Decreasing or increasing trends could be directly related with climate changes occurred during Permian-Triassic times. These changes could have caused ecologic nanism or gigantism, connected to food availability or other synergetic factors. A high gradient of temperature provides ideal conditions to a big rate of insect proliferation, supporting its diversity, while the extinctions are associated to environmental catastrophic events. At first sight, it could be interpreted that the trend of decreasing insect dimensions reflects the high levels of environmental stress already documented in the literature. However, alochronic speciation, as a result of ecologic nanism or gigantism, should also be considered when the real diversity of Permian-Triassic boundary insects is analysed.
Simposio III: Ecosistemas triásicos, su paleobiología y el contexto de recuperación de la gran extinción
Facultad de Ciencias Naturales y Museo
description During the Permian-Triassic transition, the insect faunas from all over the world suffered changes related to their diversity and abundance, as well as to their morphometric patterns. The data were obtained from the original descriptions of each species. The total size of wing was considered, whereas the small fragments without estimative total size were not taken into account. The morphometric analysis of the recorded species of the Carboniferous- Permian-Triassic entomofauna from Argentina and Brazil shows a morphologic change that reflects a general trend of body size reduction. The groups that showed an inverse trend were Mecopteroidea and Coleoptera. The statistical analysis demonstrated a decreasing trend of the wing size of Paleoptera, Orthopteroidea, Blattopteromorpha and Hemipteroidea from Paleozoic to Mesozoic. Decreasing or increasing trends could be directly related with climate changes occurred during Permian-Triassic times. These changes could have caused ecologic nanism or gigantism, connected to food availability or other synergetic factors. A high gradient of temperature provides ideal conditions to a big rate of insect proliferation, supporting its diversity, while the extinctions are associated to environmental catastrophic events. At first sight, it could be interpreted that the trend of decreasing insect dimensions reflects the high levels of environmental stress already documented in the literature. However, alochronic speciation, as a result of ecologic nanism or gigantism, should also be considered when the real diversity of Permian-Triassic boundary insects is analysed.
publishDate 2010
dc.date.none.fl_str_mv 2010
dc.type.none.fl_str_mv info:eu-repo/semantics/conferenceObject
info:eu-repo/semantics/publishedVersion
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url http://sedici.unlp.edu.ar/handle/10915/16658
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/isbn/978-987-95849-7-2
info:eu-repo/semantics/reference/hdl/10915/25738
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
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