First fossil insect record from the Arroyo Totoral Formation (Lower Permian), Paganzo Basin, La Rioja Province, Argentina

The Permian entomofaunas (~290–252 Ma) were characterized by many Carboniferous groups, but they also marked the origin of new insect orders such as the basal relatives of plecopterans, mecopterans, psocopterans, and beetles. During this time, new mouthpart types (e.g., stylate piercing-and-sucking)...

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Autores principales: Lara, María Belén, Cariglino, Bárbara, Balarino, Lucía María, Ruffo Rey, Lautaro Javier, Ruiz, Daniela Patricia, Mirabelli, Sebastián
Formato: Reunión
Lenguaje:Inglés
Publicado: Asociación Paleontológica Argentina 2025
Materias:
Insecto fósil
Pérmico
Argentina
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/59285
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-59285
record_format dspace
spelling I48-R184-123456789-592852025-12-15T11:54:15Z First fossil insect record from the Arroyo Totoral Formation (Lower Permian), Paganzo Basin, La Rioja Province, Argentina Lara, María Belén Cariglino, Bárbara Balarino, Lucía María Ruffo Rey, Lautaro Javier Ruiz, Daniela Patricia Mirabelli, Sebastián Insecto fósil Pérmico Argentina The Permian entomofaunas (~290–252 Ma) were characterized by many Carboniferous groups, but they also marked the origin of new insect orders such as the basal relatives of plecopterans, mecopterans, psocopterans, and beetles. During this time, new mouthpart types (e.g., stylate piercing-and-sucking) and functional feeding activities appeared, hence the seeking of new food sources, which led to the diversification, evolution, and expansion of the herbivorous insects. More than 35 fossil insect species, represented by forewing impressions, have been collected and described from different Permian outcrops of Argentina, Brazil, and Uruguay. In Argentina, the insect records come from the Bajo de Véliz (Paganzo Basin, San Luis Province) and Río Genoa (Tepuel Genoa Basin, Chubut Province) formations. The fossils include both terrestrial phytophagous and detritivores insects such as palaeodictyopteroids (e.g., megasecopterans Sphecorydaloididae, Diaphanopteridae, Breyeriidae), polyneopteran "protorthopterans" (Proedischiidae) groups, and "cockroachoids" (Phyloblattidae). Here, we present the first fossil insect from the Arroyo Totoral Formation (early Lower Permian), south of Sierra de Los Llanos, in the eastern sector of the Paganzo Basin, southeastern La Rioja Province, Argentina. The specimen consists of a compression of a single right forewing, collected by "Macuca Team" during fieldwork carried out in 2022/2023 in Arroyo Totoral outcrops, and is housed at the Colección de Paleoinvertebrados, Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de la Rioja (CRILAR-CONICET), under the CRIPI acronym. The fossil is associated to a diverse paleoflora including glossopterids, pteridosperms, conifers, cordaitaleans, ferns, and sphenophytes, which developed under local humid conditions for the Sierra de Los Llanos area during Permian times. Based on the general venation scheme that include an elongated and comparatively narrow costal field, widened areas between the main veins (e.g., Sc, R), Sc pectinated, with branches mostly simple and nearly straight; this new specimen can be tentatively attributed to the predominantly Paleozoic Family Phyloblattidae (stem-Dictyoptera). This finding represents the first known early Permian insect found for both the La Rioja Province and Arroyo Totoral Formation pointing the unit as a new promising site for the search of fossil insects in Argentina. Future paleontological prospections in this formation will undoubtedly enrich our understanding on the diversity of insects during their early evolution. 2025-12-15T11:23:36Z 2025-12-15T11:23:36Z 2024-11-22 Reunión Lara, María Belén, et al., 2024. First fossil insect record from the Arroyo Totoral Formation (Lower Permian), Paganzo Basin, La Rioja Province, Argentina. En: Reunión de Comunicaciones de la Asociación Paleontológica Argentina. San Rafael: Asociación Paleontológica Argentina. Universidad Tecnológica Nacional. Instituto de Evolución, Ecología Histórica y Ambiente, p. 112-112. http://repositorio.unne.edu.ar/handle/123456789/59285 en ANPCyT/PICT-2021-00155/ANPCyT/PICT-2016-1954/CONICET/PUE-0098 https://doi.org/10.5710/PEAPA/19.06.2025.544 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 112-112 application/pdf Asociación Paleontológica Argentina Universidad Tecnológica Nacional. Instituto de Evolución, Ecología Histórica y Ambiente
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Insecto fósil
Pérmico
Argentina
spellingShingle Insecto fósil
Pérmico
Argentina
Lara, María Belén
Cariglino, Bárbara
Balarino, Lucía María
Ruffo Rey, Lautaro Javier
Ruiz, Daniela Patricia
Mirabelli, Sebastián
First fossil insect record from the Arroyo Totoral Formation (Lower Permian), Paganzo Basin, La Rioja Province, Argentina
topic_facet Insecto fósil
Pérmico
Argentina
description The Permian entomofaunas (~290–252 Ma) were characterized by many Carboniferous groups, but they also marked the origin of new insect orders such as the basal relatives of plecopterans, mecopterans, psocopterans, and beetles. During this time, new mouthpart types (e.g., stylate piercing-and-sucking) and functional feeding activities appeared, hence the seeking of new food sources, which led to the diversification, evolution, and expansion of the herbivorous insects. More than 35 fossil insect species, represented by forewing impressions, have been collected and described from different Permian outcrops of Argentina, Brazil, and Uruguay. In Argentina, the insect records come from the Bajo de Véliz (Paganzo Basin, San Luis Province) and Río Genoa (Tepuel Genoa Basin, Chubut Province) formations. The fossils include both terrestrial phytophagous and detritivores insects such as palaeodictyopteroids (e.g., megasecopterans Sphecorydaloididae, Diaphanopteridae, Breyeriidae), polyneopteran "protorthopterans" (Proedischiidae) groups, and "cockroachoids" (Phyloblattidae). Here, we present the first fossil insect from the Arroyo Totoral Formation (early Lower Permian), south of Sierra de Los Llanos, in the eastern sector of the Paganzo Basin, southeastern La Rioja Province, Argentina. The specimen consists of a compression of a single right forewing, collected by "Macuca Team" during fieldwork carried out in 2022/2023 in Arroyo Totoral outcrops, and is housed at the Colección de Paleoinvertebrados, Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de la Rioja (CRILAR-CONICET), under the CRIPI acronym. The fossil is associated to a diverse paleoflora including glossopterids, pteridosperms, conifers, cordaitaleans, ferns, and sphenophytes, which developed under local humid conditions for the Sierra de Los Llanos area during Permian times. Based on the general venation scheme that include an elongated and comparatively narrow costal field, widened areas between the main veins (e.g., Sc, R), Sc pectinated, with branches mostly simple and nearly straight; this new specimen can be tentatively attributed to the predominantly Paleozoic Family Phyloblattidae (stem-Dictyoptera). This finding represents the first known early Permian insect found for both the La Rioja Province and Arroyo Totoral Formation pointing the unit as a new promising site for the search of fossil insects in Argentina. Future paleontological prospections in this formation will undoubtedly enrich our understanding on the diversity of insects during their early evolution.
format Reunión
author Lara, María Belén
Cariglino, Bárbara
Balarino, Lucía María
Ruffo Rey, Lautaro Javier
Ruiz, Daniela Patricia
Mirabelli, Sebastián
author_facet Lara, María Belén
Cariglino, Bárbara
Balarino, Lucía María
Ruffo Rey, Lautaro Javier
Ruiz, Daniela Patricia
Mirabelli, Sebastián
author_sort Lara, María Belén
title First fossil insect record from the Arroyo Totoral Formation (Lower Permian), Paganzo Basin, La Rioja Province, Argentina
title_short First fossil insect record from the Arroyo Totoral Formation (Lower Permian), Paganzo Basin, La Rioja Province, Argentina
title_full First fossil insect record from the Arroyo Totoral Formation (Lower Permian), Paganzo Basin, La Rioja Province, Argentina
title_fullStr First fossil insect record from the Arroyo Totoral Formation (Lower Permian), Paganzo Basin, La Rioja Province, Argentina
title_full_unstemmed First fossil insect record from the Arroyo Totoral Formation (Lower Permian), Paganzo Basin, La Rioja Province, Argentina
title_sort first fossil insect record from the arroyo totoral formation (lower permian), paganzo basin, la rioja province, argentina
publisher Asociación Paleontológica Argentina
publishDate 2025
url http://repositorio.unne.edu.ar/handle/123456789/59285
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