New records of bioerosive traces associated with Quaternary vertebrate remains in the Toropí/Yupoí Formation (Corrientes, Argentina)

Within the fossil record, bioerosions on bone substrates are relatively rare; however, they have an important ecological value, as they allow characterizing the environmental conditions at the time they were produced and the behavior of the producing organisms. Bones constitute an important substrat...

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Autores principales: Méndez, Cecilia Romina, Luna, Carlos Alberto, Zurita, Alfredo Eduardo, Buatois, Luis
Formato: Reunión
Lenguaje:Inglés
Publicado: Asociación Paleontológica Argentina 2025
Materias:
Bioerosiones
Cuaternario
Corrientes
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/59275
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-59275
record_format dspace
spelling I48-R184-123456789-592752025-12-15T11:52:57Z New records of bioerosive traces associated with Quaternary vertebrate remains in the Toropí/Yupoí Formation (Corrientes, Argentina) Méndez, Cecilia Romina Luna, Carlos Alberto Zurita, Alfredo Eduardo Buatois, Luis Bioerosiones Cuaternario Corrientes Within the fossil record, bioerosions on bone substrates are relatively rare; however, they have an important ecological value, as they allow characterizing the environmental conditions at the time they were produced and the behavior of the producing organisms. Bones constitute an important substrate on which various organisms, in particular insects representing several orders (e.g., Dermestidae, Tenebrionidae, Calliphoridae, Tineidae, and Termitidae), produce modifications as a result of different activities such as feeding, locomotion, fixation, pupation, refuge, among other behaviors. In this study we analyze the fossil traces found in a skull of the sloth Catonyx tarijensis (CTES-PZ7151; Colección Paleontológica "Dr. Rafael Herbst" of the Universidad Nacional del Nordeste, Corrientes) collected from the Lower Member of the Toropí/Yupoí Formation (Late Pleistocene) exposed in the vicinity of Lavalle, Corrientes. The description of the traces was carried out following the methodology proposed by Pirrone and her colleagues in 2014. The material under study is in a good state of preservation, which allowed us to recognize the presence, on the left side of the skull, of a set of bioerosive traces. These are in the form of chambers, some with crescent shape, with an average maximum length of 14.72 mm in its widest part and 6.84 mm in the narrowest, while others have an oval shape, with an average length of 10.68 mm in the widest section and 5.36 mm in the narrowest. All of them have no bioglyphs or active filling, and are limited to the cortical bone. The best-preserved chambers have a flat bottom parallel to the bone surface and an acute angle between the bottom and the walls, characteristics that allow us to assign it to Cubiculum cooperi, a trace interpreted opportunely as corresponding to insect pupation (Pupichnia), probably dermestid beetles, which would be associated with the final stages of decomposition of the remains of this sloth. However, since two distinct morphologies have been identified, it is likely that more than one agent was responsible for the creation of these traces, or that they correspond to different stages of larval development of the same taxon. The presence of these perforations suggests that the animal carcasses remained on the soil surface for long periods before being buried, allowing scavenging invertebrates to take advantage of the dry bones. This new record improves our knowledge about the behavior of the cadaveric entomofauna associated with the Quaternary vertebrate remains of the Northeastern Region of Argentina. 2025-12-15T11:23:31Z 2025-12-15T11:23:31Z 2024-11-22 Reunión Méndez, Cecilia Romina, et al., 2024. New records of bioerosive traces associated with Quaternary vertebrate remains in the Toropí/Yupoí Formation (Corrientes, 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. 137-137. http://repositorio.unne.edu.ar/handle/123456789/59275 en https://doi.org/10.5710/PEAPA/19.06.2025.544 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 137-137 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 Bioerosiones
Cuaternario
Corrientes
spellingShingle Bioerosiones
Cuaternario
Corrientes
Méndez, Cecilia Romina
Luna, Carlos Alberto
Zurita, Alfredo Eduardo
Buatois, Luis
New records of bioerosive traces associated with Quaternary vertebrate remains in the Toropí/Yupoí Formation (Corrientes, Argentina)
topic_facet Bioerosiones
Cuaternario
Corrientes
description Within the fossil record, bioerosions on bone substrates are relatively rare; however, they have an important ecological value, as they allow characterizing the environmental conditions at the time they were produced and the behavior of the producing organisms. Bones constitute an important substrate on which various organisms, in particular insects representing several orders (e.g., Dermestidae, Tenebrionidae, Calliphoridae, Tineidae, and Termitidae), produce modifications as a result of different activities such as feeding, locomotion, fixation, pupation, refuge, among other behaviors. In this study we analyze the fossil traces found in a skull of the sloth Catonyx tarijensis (CTES-PZ7151; Colección Paleontológica "Dr. Rafael Herbst" of the Universidad Nacional del Nordeste, Corrientes) collected from the Lower Member of the Toropí/Yupoí Formation (Late Pleistocene) exposed in the vicinity of Lavalle, Corrientes. The description of the traces was carried out following the methodology proposed by Pirrone and her colleagues in 2014. The material under study is in a good state of preservation, which allowed us to recognize the presence, on the left side of the skull, of a set of bioerosive traces. These are in the form of chambers, some with crescent shape, with an average maximum length of 14.72 mm in its widest part and 6.84 mm in the narrowest, while others have an oval shape, with an average length of 10.68 mm in the widest section and 5.36 mm in the narrowest. All of them have no bioglyphs or active filling, and are limited to the cortical bone. The best-preserved chambers have a flat bottom parallel to the bone surface and an acute angle between the bottom and the walls, characteristics that allow us to assign it to Cubiculum cooperi, a trace interpreted opportunely as corresponding to insect pupation (Pupichnia), probably dermestid beetles, which would be associated with the final stages of decomposition of the remains of this sloth. However, since two distinct morphologies have been identified, it is likely that more than one agent was responsible for the creation of these traces, or that they correspond to different stages of larval development of the same taxon. The presence of these perforations suggests that the animal carcasses remained on the soil surface for long periods before being buried, allowing scavenging invertebrates to take advantage of the dry bones. This new record improves our knowledge about the behavior of the cadaveric entomofauna associated with the Quaternary vertebrate remains of the Northeastern Region of Argentina.
format Reunión
author Méndez, Cecilia Romina
Luna, Carlos Alberto
Zurita, Alfredo Eduardo
Buatois, Luis
author_facet Méndez, Cecilia Romina
Luna, Carlos Alberto
Zurita, Alfredo Eduardo
Buatois, Luis
author_sort Méndez, Cecilia Romina
title New records of bioerosive traces associated with Quaternary vertebrate remains in the Toropí/Yupoí Formation (Corrientes, Argentina)
title_short New records of bioerosive traces associated with Quaternary vertebrate remains in the Toropí/Yupoí Formation (Corrientes, Argentina)
title_full New records of bioerosive traces associated with Quaternary vertebrate remains in the Toropí/Yupoí Formation (Corrientes, Argentina)
title_fullStr New records of bioerosive traces associated with Quaternary vertebrate remains in the Toropí/Yupoí Formation (Corrientes, Argentina)
title_full_unstemmed New records of bioerosive traces associated with Quaternary vertebrate remains in the Toropí/Yupoí Formation (Corrientes, Argentina)
title_sort new records of bioerosive traces associated with quaternary vertebrate remains in the toropí/yupoí formation (corrientes, argentina)
publisher Asociación Paleontológica Argentina
publishDate 2025
url http://repositorio.unne.edu.ar/handle/123456789/59275
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