Carpal‐metacarpal specializations for burrowing in South American octodontoid rodents

Autores
Morgan, Cecilia Clara; Verzi, Diego Hector
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Among the ecomorphologically diverse Octodontoidea rodents, fossorial habits are prevalent in Ctenomyidae and Octodontidae and occur in some members of Echimyidae. To detect traits linked to scratch‐digging, we analyzed morpho‐structural variation in the carpus and metacarpus of 27 species of extinct and living octodontoids with epigean, fossorial and subterranean habits. Within a context of relative morphological uniformity, we detected the following specialized traits in the burrowing Clyomys (Echimyidae), Spalacopus (Octodontidae), Ctenomys and †Eucelophorus (Ctenomyidae): broad shortened carpus, robust metacarpals, markedly broad and short metacarpal V, and predominance of ray III (mesaxony, incipient in Spalacopus). In addition, the specialized subterranean Ctenomys presented an enlarged scapholunar in extensive contact with the unciform, and with a complex‐shaped proximal articular surface. These features are interpreted as responses to mechanical requirements of scratch‐digging, providing greater carpal rigidity and resistance to direct forces exerted during the digging stroke. In Ctenomys, the radius‐scapholunar joint restricts movement at wrist level. The phylogenetic distribution of traits shows that the most derived carpal and metacarpal morphologies occur among subterranean octodontoids, also possessing important craniodental adaptations, and supports the hypothesis that the acquisition of digging specializations would have been linked to increasing burrowing frequency in some lineages. Nevertheless, octodontoids with less morphological specializations have metacarpal modifications advantageous for digging, suggesting that scratch‐digging specialization preceded the acquisition of tooth‐digging traits, in agreement with the general claim that scratch‐digging is the primary digging strategy in burrowing mammals.
Fil: Morgan, Cecilia Clara. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados. Sección de Mastozoología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Verzi, Diego Hector. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados. Sección de Mastozoología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
CARPUS
CAVIOMORPHS
DIGGING
MORPHOFUNCTIONAL ANALYSIS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
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oai:ri.conicet.gov.ar:11336/95074
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network_name_str CONICET Digital (CONICET)
spelling Carpal‐metacarpal specializations for burrowing in South American octodontoid rodentsMorgan, Cecilia ClaraVerzi, Diego HectorCARPUSCAVIOMORPHSDIGGINGMORPHOFUNCTIONAL ANALYSIShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Among the ecomorphologically diverse Octodontoidea rodents, fossorial habits are prevalent in Ctenomyidae and Octodontidae and occur in some members of Echimyidae. To detect traits linked to scratch‐digging, we analyzed morpho‐structural variation in the carpus and metacarpus of 27 species of extinct and living octodontoids with epigean, fossorial and subterranean habits. Within a context of relative morphological uniformity, we detected the following specialized traits in the burrowing Clyomys (Echimyidae), Spalacopus (Octodontidae), Ctenomys and †Eucelophorus (Ctenomyidae): broad shortened carpus, robust metacarpals, markedly broad and short metacarpal V, and predominance of ray III (mesaxony, incipient in Spalacopus). In addition, the specialized subterranean Ctenomys presented an enlarged scapholunar in extensive contact with the unciform, and with a complex‐shaped proximal articular surface. These features are interpreted as responses to mechanical requirements of scratch‐digging, providing greater carpal rigidity and resistance to direct forces exerted during the digging stroke. In Ctenomys, the radius‐scapholunar joint restricts movement at wrist level. The phylogenetic distribution of traits shows that the most derived carpal and metacarpal morphologies occur among subterranean octodontoids, also possessing important craniodental adaptations, and supports the hypothesis that the acquisition of digging specializations would have been linked to increasing burrowing frequency in some lineages. Nevertheless, octodontoids with less morphological specializations have metacarpal modifications advantageous for digging, suggesting that scratch‐digging specialization preceded the acquisition of tooth‐digging traits, in agreement with the general claim that scratch‐digging is the primary digging strategy in burrowing mammals.Fil: Morgan, Cecilia Clara. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados. Sección de Mastozoología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Verzi, Diego Hector. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados. Sección de Mastozoología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaWiley Blackwell Publishing, Inc2011-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/95074Morgan, Cecilia Clara; Verzi, Diego Hector; Carpal‐metacarpal specializations for burrowing in South American octodontoid rodents; Wiley Blackwell Publishing, Inc; Journal of Anatomy; 219; 2; 8-2011; 167-1750021-8782CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/j.1469-7580.2011.01391.x/abstractinfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1469-7580.2011.01391.x/abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:02:14Zoai:ri.conicet.gov.ar:11336/95074instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:02:15.174CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Carpal‐metacarpal specializations for burrowing in South American octodontoid rodents
title Carpal‐metacarpal specializations for burrowing in South American octodontoid rodents
spellingShingle Carpal‐metacarpal specializations for burrowing in South American octodontoid rodents
Morgan, Cecilia Clara
CARPUS
CAVIOMORPHS
DIGGING
MORPHOFUNCTIONAL ANALYSIS
title_short Carpal‐metacarpal specializations for burrowing in South American octodontoid rodents
title_full Carpal‐metacarpal specializations for burrowing in South American octodontoid rodents
title_fullStr Carpal‐metacarpal specializations for burrowing in South American octodontoid rodents
title_full_unstemmed Carpal‐metacarpal specializations for burrowing in South American octodontoid rodents
title_sort Carpal‐metacarpal specializations for burrowing in South American octodontoid rodents
dc.creator.none.fl_str_mv Morgan, Cecilia Clara
Verzi, Diego Hector
author Morgan, Cecilia Clara
author_facet Morgan, Cecilia Clara
Verzi, Diego Hector
author_role author
author2 Verzi, Diego Hector
author2_role author
dc.subject.none.fl_str_mv CARPUS
CAVIOMORPHS
DIGGING
MORPHOFUNCTIONAL ANALYSIS
topic CARPUS
CAVIOMORPHS
DIGGING
MORPHOFUNCTIONAL ANALYSIS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Among the ecomorphologically diverse Octodontoidea rodents, fossorial habits are prevalent in Ctenomyidae and Octodontidae and occur in some members of Echimyidae. To detect traits linked to scratch‐digging, we analyzed morpho‐structural variation in the carpus and metacarpus of 27 species of extinct and living octodontoids with epigean, fossorial and subterranean habits. Within a context of relative morphological uniformity, we detected the following specialized traits in the burrowing Clyomys (Echimyidae), Spalacopus (Octodontidae), Ctenomys and †Eucelophorus (Ctenomyidae): broad shortened carpus, robust metacarpals, markedly broad and short metacarpal V, and predominance of ray III (mesaxony, incipient in Spalacopus). In addition, the specialized subterranean Ctenomys presented an enlarged scapholunar in extensive contact with the unciform, and with a complex‐shaped proximal articular surface. These features are interpreted as responses to mechanical requirements of scratch‐digging, providing greater carpal rigidity and resistance to direct forces exerted during the digging stroke. In Ctenomys, the radius‐scapholunar joint restricts movement at wrist level. The phylogenetic distribution of traits shows that the most derived carpal and metacarpal morphologies occur among subterranean octodontoids, also possessing important craniodental adaptations, and supports the hypothesis that the acquisition of digging specializations would have been linked to increasing burrowing frequency in some lineages. Nevertheless, octodontoids with less morphological specializations have metacarpal modifications advantageous for digging, suggesting that scratch‐digging specialization preceded the acquisition of tooth‐digging traits, in agreement with the general claim that scratch‐digging is the primary digging strategy in burrowing mammals.
Fil: Morgan, Cecilia Clara. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados. Sección de Mastozoología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Verzi, Diego Hector. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados. Sección de Mastozoología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Among the ecomorphologically diverse Octodontoidea rodents, fossorial habits are prevalent in Ctenomyidae and Octodontidae and occur in some members of Echimyidae. To detect traits linked to scratch‐digging, we analyzed morpho‐structural variation in the carpus and metacarpus of 27 species of extinct and living octodontoids with epigean, fossorial and subterranean habits. Within a context of relative morphological uniformity, we detected the following specialized traits in the burrowing Clyomys (Echimyidae), Spalacopus (Octodontidae), Ctenomys and †Eucelophorus (Ctenomyidae): broad shortened carpus, robust metacarpals, markedly broad and short metacarpal V, and predominance of ray III (mesaxony, incipient in Spalacopus). In addition, the specialized subterranean Ctenomys presented an enlarged scapholunar in extensive contact with the unciform, and with a complex‐shaped proximal articular surface. These features are interpreted as responses to mechanical requirements of scratch‐digging, providing greater carpal rigidity and resistance to direct forces exerted during the digging stroke. In Ctenomys, the radius‐scapholunar joint restricts movement at wrist level. The phylogenetic distribution of traits shows that the most derived carpal and metacarpal morphologies occur among subterranean octodontoids, also possessing important craniodental adaptations, and supports the hypothesis that the acquisition of digging specializations would have been linked to increasing burrowing frequency in some lineages. Nevertheless, octodontoids with less morphological specializations have metacarpal modifications advantageous for digging, suggesting that scratch‐digging specialization preceded the acquisition of tooth‐digging traits, in agreement with the general claim that scratch‐digging is the primary digging strategy in burrowing mammals.
publishDate 2011
dc.date.none.fl_str_mv 2011-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/95074
Morgan, Cecilia Clara; Verzi, Diego Hector; Carpal‐metacarpal specializations for burrowing in South American octodontoid rodents; Wiley Blackwell Publishing, Inc; Journal of Anatomy; 219; 2; 8-2011; 167-175
0021-8782
CONICET Digital
CONICET
url http://hdl.handle.net/11336/95074
identifier_str_mv Morgan, Cecilia Clara; Verzi, Diego Hector; Carpal‐metacarpal specializations for burrowing in South American octodontoid rodents; Wiley Blackwell Publishing, Inc; Journal of Anatomy; 219; 2; 8-2011; 167-175
0021-8782
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/j.1469-7580.2011.01391.x/abstract
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1469-7580.2011.01391.x/abstract
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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