Diversityand phylogeny of the Glyptodontidae (Xenarthra, Cingulata) from the Chasicoaim stage/age (late Miocene) of Argentina

Agreatdiversity of Glyptodontidae (Xenarthra, Cingulata) has been mentioned forthe Chasicoan Stage/Age (late Miocene), particularly in the Pampean región of Argentina, induding representativas of thetribes Palaehoplophorini, Plohophorini, and "Sclerocalyptini". In this contribution, we...

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Autores principales: Barasoain, Darío Daniel, Zurita, Alfredo Eduardo, Tomassini, Rodrigo Leandro, Contreras, Víctor Hugo
Formato: Reunión
Lenguaje:Inglés
Publicado: Asociación Paleontológica Argentina 2024
Materias:
Filogenia
Glyptodontidae
Argentina
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/54556
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-54556
record_format dspace
spelling I48-R184-123456789-545562025-03-06T11:18:50Z Diversityand phylogeny of the Glyptodontidae (Xenarthra, Cingulata) from the Chasicoaim stage/age (late Miocene) of Argentina Barasoain, Darío Daniel Zurita, Alfredo Eduardo Tomassini, Rodrigo Leandro Contreras, Víctor Hugo Filogenia Glyptodontidae Argentina Agreatdiversity of Glyptodontidae (Xenarthra, Cingulata) has been mentioned forthe Chasicoan Stage/Age (late Miocene), particularly in the Pampean región of Argentina, induding representativas of thetribes Palaehoplophorini, Plohophorini, and "Sclerocalyptini". In this contribution, we carried out a detailed revisión induding the most complete specimens known for this lapse: 1) PV-UNS-260, from Arroyo Chasicó Formation (Buenos Aires Province), composed of fragmented skull, almost complete dorsal carapace, caudal tube with first ring, and rlght fémur; and 2) PVSJ-366, from Loma de Las Tapias Formation (San Juan Province), composed of almost complete skull, dorsal carapace fragments and caudal rings. Both specimens develop dorsal carapaces with a uniform ornamentaron pattern ("rosette pattern") and a similar caudal tube morphology. Additionally, other specimens of this lapse are mainly represented by isolated osteoderms, which also show the same ornamentation pattern. Our comparative study suggests, contrary to the high diversity previously mentioned, the presence of a single morphotype for this lapse, which would represent a new taxonomic entity that, for the moment, cannot be assigned to the known tribes. This better anatomical characterization allowed to inelude Chasicoan glyptodonts into a morphological phylogentic analysis for the first time. Obtained results place them as sister group of all the following Neogene and Quaternary diversity, condition supported by the development of a unique caudal tube morphology, representing the first appearance of some derived characters in this structure, such as peripheral figures and lateral figures increasing their size towards the apex. 2024-07-27T14:12:26Z 2024-07-27T14:12:26Z 2020-11 Reunión Barasoain, Darío Daniel et al., 2020. Diversityand phylogeny of the Glyptodontidae (Xenarthra, Cingulata) from the Chasicoaim stage/age (late Miocene) of Argentina. En: 1° Reunión Virtual de Comunicaciones de la Asociación Paleontológica Argentina. Buenos Aires: Asociación Paleontológica Argentina, p. 1-1. 2469-0228 http://repositorio.unne.edu.ar/handle/123456789/54556 eng openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 1-1 application/pdf Asociación Paleontológica Argentina
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 Filogenia
Glyptodontidae
Argentina
spellingShingle Filogenia
Glyptodontidae
Argentina
Barasoain, Darío Daniel
Zurita, Alfredo Eduardo
Tomassini, Rodrigo Leandro
Contreras, Víctor Hugo
Diversityand phylogeny of the Glyptodontidae (Xenarthra, Cingulata) from the Chasicoaim stage/age (late Miocene) of Argentina
topic_facet Filogenia
Glyptodontidae
Argentina
description Agreatdiversity of Glyptodontidae (Xenarthra, Cingulata) has been mentioned forthe Chasicoan Stage/Age (late Miocene), particularly in the Pampean región of Argentina, induding representativas of thetribes Palaehoplophorini, Plohophorini, and "Sclerocalyptini". In this contribution, we carried out a detailed revisión induding the most complete specimens known for this lapse: 1) PV-UNS-260, from Arroyo Chasicó Formation (Buenos Aires Province), composed of fragmented skull, almost complete dorsal carapace, caudal tube with first ring, and rlght fémur; and 2) PVSJ-366, from Loma de Las Tapias Formation (San Juan Province), composed of almost complete skull, dorsal carapace fragments and caudal rings. Both specimens develop dorsal carapaces with a uniform ornamentaron pattern ("rosette pattern") and a similar caudal tube morphology. Additionally, other specimens of this lapse are mainly represented by isolated osteoderms, which also show the same ornamentation pattern. Our comparative study suggests, contrary to the high diversity previously mentioned, the presence of a single morphotype for this lapse, which would represent a new taxonomic entity that, for the moment, cannot be assigned to the known tribes. This better anatomical characterization allowed to inelude Chasicoan glyptodonts into a morphological phylogentic analysis for the first time. Obtained results place them as sister group of all the following Neogene and Quaternary diversity, condition supported by the development of a unique caudal tube morphology, representing the first appearance of some derived characters in this structure, such as peripheral figures and lateral figures increasing their size towards the apex.
format Reunión
author Barasoain, Darío Daniel
Zurita, Alfredo Eduardo
Tomassini, Rodrigo Leandro
Contreras, Víctor Hugo
author_facet Barasoain, Darío Daniel
Zurita, Alfredo Eduardo
Tomassini, Rodrigo Leandro
Contreras, Víctor Hugo
author_sort Barasoain, Darío Daniel
title Diversityand phylogeny of the Glyptodontidae (Xenarthra, Cingulata) from the Chasicoaim stage/age (late Miocene) of Argentina
title_short Diversityand phylogeny of the Glyptodontidae (Xenarthra, Cingulata) from the Chasicoaim stage/age (late Miocene) of Argentina
title_full Diversityand phylogeny of the Glyptodontidae (Xenarthra, Cingulata) from the Chasicoaim stage/age (late Miocene) of Argentina
title_fullStr Diversityand phylogeny of the Glyptodontidae (Xenarthra, Cingulata) from the Chasicoaim stage/age (late Miocene) of Argentina
title_full_unstemmed Diversityand phylogeny of the Glyptodontidae (Xenarthra, Cingulata) from the Chasicoaim stage/age (late Miocene) of Argentina
title_sort diversityand phylogeny of the glyptodontidae (xenarthra, cingulata) from the chasicoaim stage/age (late miocene) of argentina
publisher Asociación Paleontológica Argentina
publishDate 2024
url http://repositorio.unne.edu.ar/handle/123456789/54556
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