New anatomical and phylogenetic data on the late Neogene armadillo Macrochorobates scalabrinii (Chlamyphoridae, Euphractinae)

Macrochorobates is a genus of big sized Euphractinae armadillos restricted to the late Neogene of Argentina. It includes the species M. scalabriniiand M. chapalmalensis. Particularly, M. scalabriniiis recorded in the late Miocene (Chasicoan-Huayquerian) of Buenos Aires, La Pampa, and San Juan pr...

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Detalles Bibliográficos
Autores principales: Barasoain, Darío Daniel, Bonini, Ricardo Adolfo, Zurita, Alfredo Eduardo, Tomassini, Rodrigo Leandro
Formato: Reunión
Lenguaje:Inglés
Publicado: Asociación Paleontológica Argentina 2024
Materias:
Neógeno
Armadillo
Macrochorobates scalabrinii
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/54555
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-54555
record_format dspace
spelling I48-R184-123456789-545552025-03-06T11:21:45Z New anatomical and phylogenetic data on the late Neogene armadillo Macrochorobates scalabrinii (Chlamyphoridae, Euphractinae) Barasoain, Darío Daniel Bonini, Ricardo Adolfo Zurita, Alfredo Eduardo Tomassini, Rodrigo Leandro Neógeno Armadillo Macrochorobates scalabrinii Macrochorobates is a genus of big sized Euphractinae armadillos restricted to the late Neogene of Argentina. It includes the species M. scalabriniiand M. chapalmalensis. Particularly, M. scalabriniiis recorded in the late Miocene (Chasicoan-Huayquerian) of Buenos Aires, La Pampa, and San Juan provinces, and the late Miocene-early Pliocene (Messinian-Zanclean) of Tucumán, La Rioja, Catamarca, and Jujuy provinces. Most specimens are represented by isolated osteoderms, while more complete specimens are quite rare. We analyze here the most complete dorsal carapace (FMNH-P14510) and skull (FMNH-P14360) known for the genus, coming from late Miocene-early Pliocene levels of Andalhuala Formation outcropping at Puerta de Corral Quemado and Santa María Valley localities respectively, in Catamarca Province. This study provides the first detailed anatomical description of the skull and increases the knowledge of the dorsal carapace morphology. These aspects allowed to include this taxon for the first time into a morphological phylogenetic analysis. Obtained results support its inclusion within Euphractinae, revealing a close affinity with other late Neogene genera, and a sister group relationship with the genus Macroeuphractus, based on: a) anterior teeth oriented obliquely to the long axis of toothrow; b) very flattened braincase with parietals dorso-ventrally compressed; c) well developed sagittal crest; d) large and wide orbits; e) underdeveloped scapular shield of the dorsal carapace; and f) mobile osteoderms with very deviated central figures and undivided peripheral figures. Geographic distribution seem to vary with its biochron, as older records come from Pampean Region while most modern ones come from Cuyo and NOA regions. 2024-07-27T14:08:36Z 2024-07-27T14:08:36Z 2020-11 Reunión Barasoain, Darío Daniel et al., 2020. New anatomical and phylogenetic data on the late Neogene armadillo Macrochorobates scalabrinii (Chlamyphoridae, Euphractinae). En: 1° Reunión Virtual de Comunicaciones de la Asociación Paleontológica Argentina. Buenos Aires: Asociación Paleontológica Argentina, p. 6-6. 2469-0228 http://repositorio.unne.edu.ar/handle/123456789/54555 eng openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 6-6 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 Neógeno
Armadillo
Macrochorobates scalabrinii
spellingShingle Neógeno
Armadillo
Macrochorobates scalabrinii
Barasoain, Darío Daniel
Bonini, Ricardo Adolfo
Zurita, Alfredo Eduardo
Tomassini, Rodrigo Leandro
New anatomical and phylogenetic data on the late Neogene armadillo Macrochorobates scalabrinii (Chlamyphoridae, Euphractinae)
topic_facet Neógeno
Armadillo
Macrochorobates scalabrinii
description Macrochorobates is a genus of big sized Euphractinae armadillos restricted to the late Neogene of Argentina. It includes the species M. scalabriniiand M. chapalmalensis. Particularly, M. scalabriniiis recorded in the late Miocene (Chasicoan-Huayquerian) of Buenos Aires, La Pampa, and San Juan provinces, and the late Miocene-early Pliocene (Messinian-Zanclean) of Tucumán, La Rioja, Catamarca, and Jujuy provinces. Most specimens are represented by isolated osteoderms, while more complete specimens are quite rare. We analyze here the most complete dorsal carapace (FMNH-P14510) and skull (FMNH-P14360) known for the genus, coming from late Miocene-early Pliocene levels of Andalhuala Formation outcropping at Puerta de Corral Quemado and Santa María Valley localities respectively, in Catamarca Province. This study provides the first detailed anatomical description of the skull and increases the knowledge of the dorsal carapace morphology. These aspects allowed to include this taxon for the first time into a morphological phylogenetic analysis. Obtained results support its inclusion within Euphractinae, revealing a close affinity with other late Neogene genera, and a sister group relationship with the genus Macroeuphractus, based on: a) anterior teeth oriented obliquely to the long axis of toothrow; b) very flattened braincase with parietals dorso-ventrally compressed; c) well developed sagittal crest; d) large and wide orbits; e) underdeveloped scapular shield of the dorsal carapace; and f) mobile osteoderms with very deviated central figures and undivided peripheral figures. Geographic distribution seem to vary with its biochron, as older records come from Pampean Region while most modern ones come from Cuyo and NOA regions.
format Reunión
author Barasoain, Darío Daniel
Bonini, Ricardo Adolfo
Zurita, Alfredo Eduardo
Tomassini, Rodrigo Leandro
author_facet Barasoain, Darío Daniel
Bonini, Ricardo Adolfo
Zurita, Alfredo Eduardo
Tomassini, Rodrigo Leandro
author_sort Barasoain, Darío Daniel
title New anatomical and phylogenetic data on the late Neogene armadillo Macrochorobates scalabrinii (Chlamyphoridae, Euphractinae)
title_short New anatomical and phylogenetic data on the late Neogene armadillo Macrochorobates scalabrinii (Chlamyphoridae, Euphractinae)
title_full New anatomical and phylogenetic data on the late Neogene armadillo Macrochorobates scalabrinii (Chlamyphoridae, Euphractinae)
title_fullStr New anatomical and phylogenetic data on the late Neogene armadillo Macrochorobates scalabrinii (Chlamyphoridae, Euphractinae)
title_full_unstemmed New anatomical and phylogenetic data on the late Neogene armadillo Macrochorobates scalabrinii (Chlamyphoridae, Euphractinae)
title_sort new anatomical and phylogenetic data on the late neogene armadillo macrochorobates scalabrinii (chlamyphoridae, euphractinae)
publisher Asociación Paleontológica Argentina
publishDate 2024
url http://repositorio.unne.edu.ar/handle/123456789/54555
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