The vertebral column of Chaetophractus villosus (Desmarest, 1804) (Chlamyphoridae, Cingulata, Xenarthra): anatomy and Thoracolumbar variation. Spinal cord relation
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Papéis Avulsos de Zoologia (Online) |
Texto Completo: | https://www.revistas.usp.br/paz/article/view/183665 |
Resumo: | Mammals of the Xenarthra clade show a large number of unusual characters in the skeleton, mainly in the vertebral column. In spite of the importance of the knowledge on the axial skeleton in this group, there are no detailed studies on the morphology of the entire vertebral column. Here we performed a comprehensive study of the vertebral column of Chaetophractus villosus (Desmarest, 1804), a representative of Chlamyphoridae, in order to provide a more reliable comparative framework among armadillos. Morphological description was based on 44 adult postcranial axial skeletons. As a complement to the morphological descriptions of the skeleton we studied the paths followed by blood vessels and nerves in close relationship to the axial skeleton (using 13 fresh adult specimens, six females and seven males, part of the doctoral Thesis of one of the authors). Intraspecific variability in the thoracolumbar number in C. villosus was also evaluated. We identified certain variability in the position of the first vertebral pair that bears a xenarthral facet, ranging from T4-T5 to T6-T7, being T5-T6 and T6-T7 the most frequent positions. The second pair of xenarthrales is set near the thoracolumbar limit, and ranges between T9-T10 and T11-L1 (T10-T11 in most specimens). The variability in the total number of thoracolumbars in C. villosus falls within the range of most mammals and sets controversy about an important morphological feature that groups extant Xenarthra and Afrotheria into the southern placentals (Atlantogenata). In this regard, a more comprehensive study of this character is necessary to elucidate the patterns of distribution of this trait among xenarthrans. |
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The vertebral column of Chaetophractus villosus (Desmarest, 1804) (Chlamyphoridae, Cingulata, Xenarthra): anatomy and Thoracolumbar variation. Spinal cord relationArmadillosVertebral morphologyThoracolumbar numberMammals of the Xenarthra clade show a large number of unusual characters in the skeleton, mainly in the vertebral column. In spite of the importance of the knowledge on the axial skeleton in this group, there are no detailed studies on the morphology of the entire vertebral column. Here we performed a comprehensive study of the vertebral column of Chaetophractus villosus (Desmarest, 1804), a representative of Chlamyphoridae, in order to provide a more reliable comparative framework among armadillos. Morphological description was based on 44 adult postcranial axial skeletons. As a complement to the morphological descriptions of the skeleton we studied the paths followed by blood vessels and nerves in close relationship to the axial skeleton (using 13 fresh adult specimens, six females and seven males, part of the doctoral Thesis of one of the authors). Intraspecific variability in the thoracolumbar number in C. villosus was also evaluated. We identified certain variability in the position of the first vertebral pair that bears a xenarthral facet, ranging from T4-T5 to T6-T7, being T5-T6 and T6-T7 the most frequent positions. The second pair of xenarthrales is set near the thoracolumbar limit, and ranges between T9-T10 and T11-L1 (T10-T11 in most specimens). The variability in the total number of thoracolumbars in C. villosus falls within the range of most mammals and sets controversy about an important morphological feature that groups extant Xenarthra and Afrotheria into the southern placentals (Atlantogenata). In this regard, a more comprehensive study of this character is necessary to elucidate the patterns of distribution of this trait among xenarthrans.Universidade de São Paulo (USP), Museu de Zoologia (MZUSP).2022-05-27info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/paz/article/view/18366510.11606/1807-0205/2022.62.032Papéis Avulsos de Zoologia; v. 62 (2022); e202262032Papéis Avulsos de Zoologia; Vol. 62 (2022); e202262032Papéis Avulsos de Zoologia; Vol. 62 (2022); e2022620321807-02050031-1049reponame:Papéis Avulsos de Zoologia (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/paz/article/view/183665/182516Copyright (c) 2022 Papéis Avulsos de Zoologiahttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessGalliari, Fernando CarlosRossi, Luis FranciscoAldana-Marcos, Hernán Javier2022-01-31T10:59:27Zoai:revistas.usp.br:article/183665Revistahttps://www.revistas.usp.br/pazPUBhttps://www.revistas.usp.br/paz/oaipublicacaomz@usp.br ; einicker@usp.br1807-02050031-1049opendoar:2023-01-12T16:42:07.050682Papéis Avulsos de Zoologia (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
The vertebral column of Chaetophractus villosus (Desmarest, 1804) (Chlamyphoridae, Cingulata, Xenarthra): anatomy and Thoracolumbar variation. Spinal cord relation |
title |
The vertebral column of Chaetophractus villosus (Desmarest, 1804) (Chlamyphoridae, Cingulata, Xenarthra): anatomy and Thoracolumbar variation. Spinal cord relation |
spellingShingle |
The vertebral column of Chaetophractus villosus (Desmarest, 1804) (Chlamyphoridae, Cingulata, Xenarthra): anatomy and Thoracolumbar variation. Spinal cord relation Galliari, Fernando Carlos Armadillos Vertebral morphology Thoracolumbar number |
title_short |
The vertebral column of Chaetophractus villosus (Desmarest, 1804) (Chlamyphoridae, Cingulata, Xenarthra): anatomy and Thoracolumbar variation. Spinal cord relation |
title_full |
The vertebral column of Chaetophractus villosus (Desmarest, 1804) (Chlamyphoridae, Cingulata, Xenarthra): anatomy and Thoracolumbar variation. Spinal cord relation |
title_fullStr |
The vertebral column of Chaetophractus villosus (Desmarest, 1804) (Chlamyphoridae, Cingulata, Xenarthra): anatomy and Thoracolumbar variation. Spinal cord relation |
title_full_unstemmed |
The vertebral column of Chaetophractus villosus (Desmarest, 1804) (Chlamyphoridae, Cingulata, Xenarthra): anatomy and Thoracolumbar variation. Spinal cord relation |
title_sort |
The vertebral column of Chaetophractus villosus (Desmarest, 1804) (Chlamyphoridae, Cingulata, Xenarthra): anatomy and Thoracolumbar variation. Spinal cord relation |
author |
Galliari, Fernando Carlos |
author_facet |
Galliari, Fernando Carlos Rossi, Luis Francisco Aldana-Marcos, Hernán Javier |
author_role |
author |
author2 |
Rossi, Luis Francisco Aldana-Marcos, Hernán Javier |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Galliari, Fernando Carlos Rossi, Luis Francisco Aldana-Marcos, Hernán Javier |
dc.subject.por.fl_str_mv |
Armadillos Vertebral morphology Thoracolumbar number |
topic |
Armadillos Vertebral morphology Thoracolumbar number |
description |
Mammals of the Xenarthra clade show a large number of unusual characters in the skeleton, mainly in the vertebral column. In spite of the importance of the knowledge on the axial skeleton in this group, there are no detailed studies on the morphology of the entire vertebral column. Here we performed a comprehensive study of the vertebral column of Chaetophractus villosus (Desmarest, 1804), a representative of Chlamyphoridae, in order to provide a more reliable comparative framework among armadillos. Morphological description was based on 44 adult postcranial axial skeletons. As a complement to the morphological descriptions of the skeleton we studied the paths followed by blood vessels and nerves in close relationship to the axial skeleton (using 13 fresh adult specimens, six females and seven males, part of the doctoral Thesis of one of the authors). Intraspecific variability in the thoracolumbar number in C. villosus was also evaluated. We identified certain variability in the position of the first vertebral pair that bears a xenarthral facet, ranging from T4-T5 to T6-T7, being T5-T6 and T6-T7 the most frequent positions. The second pair of xenarthrales is set near the thoracolumbar limit, and ranges between T9-T10 and T11-L1 (T10-T11 in most specimens). The variability in the total number of thoracolumbars in C. villosus falls within the range of most mammals and sets controversy about an important morphological feature that groups extant Xenarthra and Afrotheria into the southern placentals (Atlantogenata). In this regard, a more comprehensive study of this character is necessary to elucidate the patterns of distribution of this trait among xenarthrans. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-05-27 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/paz/article/view/183665 10.11606/1807-0205/2022.62.032 |
url |
https://www.revistas.usp.br/paz/article/view/183665 |
identifier_str_mv |
10.11606/1807-0205/2022.62.032 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/paz/article/view/183665/182516 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2022 Papéis Avulsos de Zoologia https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2022 Papéis Avulsos de Zoologia https://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo (USP), Museu de Zoologia (MZUSP). |
publisher.none.fl_str_mv |
Universidade de São Paulo (USP), Museu de Zoologia (MZUSP). |
dc.source.none.fl_str_mv |
Papéis Avulsos de Zoologia; v. 62 (2022); e202262032 Papéis Avulsos de Zoologia; Vol. 62 (2022); e202262032 Papéis Avulsos de Zoologia; Vol. 62 (2022); e202262032 1807-0205 0031-1049 reponame:Papéis Avulsos de Zoologia (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Papéis Avulsos de Zoologia (Online) |
collection |
Papéis Avulsos de Zoologia (Online) |
repository.name.fl_str_mv |
Papéis Avulsos de Zoologia (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
publicacaomz@usp.br ; einicker@usp.br |
_version_ |
1797051529581035520 |