A preliminary assessment of the Permian and Triassic insect records from southern South America

Autores
Lara, Maria Belén; Cariglino, B.; Zavattieri, Ana Maria
Año de publicación
2021
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
During the late Paleozoic-early Mesozoic, southwestern Gondwana comprised extensive areas that are nowadays represented in southern South America throughout significant continental deposits bearing abundant and diverse invertebrate fossils. The insect record is however, mostly known from Argentina, being less common in Brazil, Chile and Uruguay, probably due to poor exploration and lack of identification of deposits with insect fossils. Currently, there are a total of 37 fossil insect species described from Permian units in South America, in which only forewing impressions are preserved. For the Triassic, the entomological picture is completely different; approximately 97 species have been identified to date, based on more than a thousand specimens (mainly forewings and isolated elytra) collected from different outcrops. A thorough compilation of the literature, together with the addition of abundant, new fossil insect material collected after several fieldwork seasons by this research group, indicates that the entomofaunas recorded in South America are consistent with the proposal of a ?Paleozoic Evolutionary Fauna? shifting to a ?Modern Evolutionary Fauna? after the Permo?Triassic mass extinction event. This transition is reflected in the South American faunas by the turnover of the Paleozoic basal clades (e.g., archaeorthopterans, megasecopterans, diaphanopterodeans, palaeodictyopterans, ?protorthopterans?, protophasmids, blattodeans, hemipteroids, among others), by more modern and derived taxa in the Triassic (e.g., dipterans, hymenopterans, odonatans, scorpionflies, aquatic heteropterans, etc.). Despite this apparent faunistic replacement, some Permian insect groups crossed the P/T limit and remained well into the Triassic (e.g., Scytinopteridae, Dysmorphoptilidae), further supporting a gradual turnover between these two entomofaunas. The entomological differences observed in the numerous Permian and Triassic units considered in this preliminary study, could be related to floristic, environmental, and climatic changes, as this time interval is crossed by salient events of both local and regional extent, such as extreme temperature fluctuations, intense magmatism and the major extinction event ever recorded. Nonetheless, collection and taphonomic biases should not be ruled out, as paleoentomology is rarely considered as a line of investigation in South American countries, resulting in lack of exploration and delayed knowledge of past invertebrate faunas.
Fil: Lara, Maria Belén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina
Fil: Cariglino, B.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Zavattieri, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
XII Congreso de la Asociación Paleontológica Argentina
Buenos Aires
Argentina
Asociación Paleontológica Argentina
Materia
INSECTS
PERMIAN
TRIASSIC
SOUTH AMERICA
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/239708
Acceder
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network_name_str CONICET Digital (CONICET)
spelling A preliminary assessment of the Permian and Triassic insect records from southern South AmericaLara, Maria BelénCariglino, B.Zavattieri, Ana MariaINSECTSPERMIANTRIASSICSOUTH AMERICAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1During the late Paleozoic-early Mesozoic, southwestern Gondwana comprised extensive areas that are nowadays represented in southern South America throughout significant continental deposits bearing abundant and diverse invertebrate fossils. The insect record is however, mostly known from Argentina, being less common in Brazil, Chile and Uruguay, probably due to poor exploration and lack of identification of deposits with insect fossils. Currently, there are a total of 37 fossil insect species described from Permian units in South America, in which only forewing impressions are preserved. For the Triassic, the entomological picture is completely different; approximately 97 species have been identified to date, based on more than a thousand specimens (mainly forewings and isolated elytra) collected from different outcrops. A thorough compilation of the literature, together with the addition of abundant, new fossil insect material collected after several fieldwork seasons by this research group, indicates that the entomofaunas recorded in South America are consistent with the proposal of a ?Paleozoic Evolutionary Fauna? shifting to a ?Modern Evolutionary Fauna? after the Permo?Triassic mass extinction event. This transition is reflected in the South American faunas by the turnover of the Paleozoic basal clades (e.g., archaeorthopterans, megasecopterans, diaphanopterodeans, palaeodictyopterans, ?protorthopterans?, protophasmids, blattodeans, hemipteroids, among others), by more modern and derived taxa in the Triassic (e.g., dipterans, hymenopterans, odonatans, scorpionflies, aquatic heteropterans, etc.). Despite this apparent faunistic replacement, some Permian insect groups crossed the P/T limit and remained well into the Triassic (e.g., Scytinopteridae, Dysmorphoptilidae), further supporting a gradual turnover between these two entomofaunas. The entomological differences observed in the numerous Permian and Triassic units considered in this preliminary study, could be related to floristic, environmental, and climatic changes, as this time interval is crossed by salient events of both local and regional extent, such as extreme temperature fluctuations, intense magmatism and the major extinction event ever recorded. Nonetheless, collection and taphonomic biases should not be ruled out, as paleoentomology is rarely considered as a line of investigation in South American countries, resulting in lack of exploration and delayed knowledge of past invertebrate faunas.Fil: Lara, Maria Belén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; ArgentinaFil: Cariglino, B.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Zavattieri, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaXII Congreso de la Asociación Paleontológica ArgentinaBuenos AiresArgentinaAsociación Paleontológica ArgentinaAsociación Paleontológica Argentina2021info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/239708A preliminary assessment of the Permian and Triassic insect records from southern South America; XII Congreso de la Asociación Paleontológica Argentina; Buenos Aires; Argentina; 2021; 1-52469-0228CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.peapaleontologica.org.ar/index.php/peapa/article/view/422info:eu-repo/semantics/altIdentifier/doi/10.5710/PEAPA.23.03.2022.422Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:22:20Zoai:ri.conicet.gov.ar:11336/239708instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:22:20.576CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A preliminary assessment of the Permian and Triassic insect records from southern South America
title A preliminary assessment of the Permian and Triassic insect records from southern South America
spellingShingle A preliminary assessment of the Permian and Triassic insect records from southern South America
Lara, Maria Belén
INSECTS
PERMIAN
TRIASSIC
SOUTH AMERICA
title_short A preliminary assessment of the Permian and Triassic insect records from southern South America
title_full A preliminary assessment of the Permian and Triassic insect records from southern South America
title_fullStr A preliminary assessment of the Permian and Triassic insect records from southern South America
title_full_unstemmed A preliminary assessment of the Permian and Triassic insect records from southern South America
title_sort A preliminary assessment of the Permian and Triassic insect records from southern South America
dc.creator.none.fl_str_mv Lara, Maria Belén
Cariglino, B.
Zavattieri, Ana Maria
author Lara, Maria Belén
author_facet Lara, Maria Belén
Cariglino, B.
Zavattieri, Ana Maria
author_role author
author2 Cariglino, B.
Zavattieri, Ana Maria
author2_role author
author
dc.subject.none.fl_str_mv INSECTS
PERMIAN
TRIASSIC
SOUTH AMERICA
topic INSECTS
PERMIAN
TRIASSIC
SOUTH AMERICA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv During the late Paleozoic-early Mesozoic, southwestern Gondwana comprised extensive areas that are nowadays represented in southern South America throughout significant continental deposits bearing abundant and diverse invertebrate fossils. The insect record is however, mostly known from Argentina, being less common in Brazil, Chile and Uruguay, probably due to poor exploration and lack of identification of deposits with insect fossils. Currently, there are a total of 37 fossil insect species described from Permian units in South America, in which only forewing impressions are preserved. For the Triassic, the entomological picture is completely different; approximately 97 species have been identified to date, based on more than a thousand specimens (mainly forewings and isolated elytra) collected from different outcrops. A thorough compilation of the literature, together with the addition of abundant, new fossil insect material collected after several fieldwork seasons by this research group, indicates that the entomofaunas recorded in South America are consistent with the proposal of a ?Paleozoic Evolutionary Fauna? shifting to a ?Modern Evolutionary Fauna? after the Permo?Triassic mass extinction event. This transition is reflected in the South American faunas by the turnover of the Paleozoic basal clades (e.g., archaeorthopterans, megasecopterans, diaphanopterodeans, palaeodictyopterans, ?protorthopterans?, protophasmids, blattodeans, hemipteroids, among others), by more modern and derived taxa in the Triassic (e.g., dipterans, hymenopterans, odonatans, scorpionflies, aquatic heteropterans, etc.). Despite this apparent faunistic replacement, some Permian insect groups crossed the P/T limit and remained well into the Triassic (e.g., Scytinopteridae, Dysmorphoptilidae), further supporting a gradual turnover between these two entomofaunas. The entomological differences observed in the numerous Permian and Triassic units considered in this preliminary study, could be related to floristic, environmental, and climatic changes, as this time interval is crossed by salient events of both local and regional extent, such as extreme temperature fluctuations, intense magmatism and the major extinction event ever recorded. Nonetheless, collection and taphonomic biases should not be ruled out, as paleoentomology is rarely considered as a line of investigation in South American countries, resulting in lack of exploration and delayed knowledge of past invertebrate faunas.
Fil: Lara, Maria Belén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina
Fil: Cariglino, B.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Zavattieri, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
XII Congreso de la Asociación Paleontológica Argentina
Buenos Aires
Argentina
Asociación Paleontológica Argentina
description During the late Paleozoic-early Mesozoic, southwestern Gondwana comprised extensive areas that are nowadays represented in southern South America throughout significant continental deposits bearing abundant and diverse invertebrate fossils. The insect record is however, mostly known from Argentina, being less common in Brazil, Chile and Uruguay, probably due to poor exploration and lack of identification of deposits with insect fossils. Currently, there are a total of 37 fossil insect species described from Permian units in South America, in which only forewing impressions are preserved. For the Triassic, the entomological picture is completely different; approximately 97 species have been identified to date, based on more than a thousand specimens (mainly forewings and isolated elytra) collected from different outcrops. A thorough compilation of the literature, together with the addition of abundant, new fossil insect material collected after several fieldwork seasons by this research group, indicates that the entomofaunas recorded in South America are consistent with the proposal of a ?Paleozoic Evolutionary Fauna? shifting to a ?Modern Evolutionary Fauna? after the Permo?Triassic mass extinction event. This transition is reflected in the South American faunas by the turnover of the Paleozoic basal clades (e.g., archaeorthopterans, megasecopterans, diaphanopterodeans, palaeodictyopterans, ?protorthopterans?, protophasmids, blattodeans, hemipteroids, among others), by more modern and derived taxa in the Triassic (e.g., dipterans, hymenopterans, odonatans, scorpionflies, aquatic heteropterans, etc.). Despite this apparent faunistic replacement, some Permian insect groups crossed the P/T limit and remained well into the Triassic (e.g., Scytinopteridae, Dysmorphoptilidae), further supporting a gradual turnover between these two entomofaunas. The entomological differences observed in the numerous Permian and Triassic units considered in this preliminary study, could be related to floristic, environmental, and climatic changes, as this time interval is crossed by salient events of both local and regional extent, such as extreme temperature fluctuations, intense magmatism and the major extinction event ever recorded. Nonetheless, collection and taphonomic biases should not be ruled out, as paleoentomology is rarely considered as a line of investigation in South American countries, resulting in lack of exploration and delayed knowledge of past invertebrate faunas.
publishDate 2021
dc.date.none.fl_str_mv 2021
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dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/239708
A preliminary assessment of the Permian and Triassic insect records from southern South America; XII Congreso de la Asociación Paleontológica Argentina; Buenos Aires; Argentina; 2021; 1-5
2469-0228
CONICET Digital
CONICET
url http://hdl.handle.net/11336/239708
identifier_str_mv A preliminary assessment of the Permian and Triassic insect records from southern South America; XII Congreso de la Asociación Paleontológica Argentina; Buenos Aires; Argentina; 2021; 1-5
2469-0228
CONICET Digital
CONICET
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dc.publisher.none.fl_str_mv Asociación Paleontológica Argentina
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