Forelimb proportions and fossorial adaptations in the scratch-digging rodent <i>Ctenomys</i> (Caviomorpha)

Autores
Elissamburu, Andrea; De Santis, Luciano José María
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Members of the genus Ctenomys (tuco-tuco; Rodentia: Caviomorpha: Octodontidae) are considered scratch diggers. We compared the forelimbs of adult C. azarae with those of 13 species within other genera of caviomorph rodents to identify morphofunctional variation in osseous elements related to fossorial habits. Eight measurements of the humerus and ulna were used to construct five functional indices that were subjected to principal components analysis and simple comparisons among means. Ctenomys has a general morphology similar to that of terrestrial caviomorph rodents but exhibits some features that reflect its specialized fossorial condition, such as its comparatively large epicondyles. These features indicate greater muscular development and capacity for force production in the pronators and supinators of the forelimb and manus and flexors of the manus. The deltoid complex is well developed, indicating a large moment arm for the deltoid and latissimus dorsi muscles, which increases the capacity for force production on humeral flexion. Humeral indices are the best for differentiating fossorial forms from diggers, occasional diggers, generalized, and cursorial forms. Limb bone segments are used differently by highly fossorial and scratch-digging forms.
Facultad de Ciencias Naturales y Museo
Materia
Zoología
Ciencias Naturales
Ctenomys
forelimb
fossorial adaptations
morphometry
Adaptación
Extremidades
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/84133

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spelling Forelimb proportions and fossorial adaptations in the scratch-digging rodent <i>Ctenomys</i> (Caviomorpha)Elissamburu, AndreaDe Santis, Luciano José MaríaZoologíaCiencias NaturalesCtenomysforelimbfossorial adaptationsmorphometryAdaptaciónExtremidadesMembers of the genus <i>Ctenomys</i> (tuco-tuco; Rodentia: Caviomorpha: Octodontidae) are considered scratch diggers. We compared the forelimbs of adult <i>C. azarae</i> with those of 13 species within other genera of caviomorph rodents to identify morphofunctional variation in osseous elements related to fossorial habits. Eight measurements of the humerus and ulna were used to construct five functional indices that were subjected to principal components analysis and simple comparisons among means. <i>Ctenomys</i> has a general morphology similar to that of terrestrial caviomorph rodents but exhibits some features that reflect its specialized fossorial condition, such as its comparatively large epicondyles. These features indicate greater muscular development and capacity for force production in the pronators and supinators of the forelimb and manus and flexors of the manus. The deltoid complex is well developed, indicating a large moment arm for the deltoid and latissimus dorsi muscles, which increases the capacity for force production on humeral flexion. Humeral indices are the best for differentiating fossorial forms from diggers, occasional diggers, generalized, and cursorial forms. Limb bone segments are used differently by highly fossorial and scratch-digging forms.Facultad de Ciencias Naturales y Museo2011-06-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf683-689http://sedici.unlp.edu.ar/handle/10915/84133enginfo:eu-repo/semantics/altIdentifier/issn/0022-2372info:eu-repo/semantics/altIdentifier/doi/10.1644/09-mamm-a-113.1info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:16:06Zoai:sedici.unlp.edu.ar:10915/84133Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:06.564SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Forelimb proportions and fossorial adaptations in the scratch-digging rodent <i>Ctenomys</i> (Caviomorpha)
title Forelimb proportions and fossorial adaptations in the scratch-digging rodent <i>Ctenomys</i> (Caviomorpha)
spellingShingle Forelimb proportions and fossorial adaptations in the scratch-digging rodent <i>Ctenomys</i> (Caviomorpha)
Elissamburu, Andrea
Zoología
Ciencias Naturales
Ctenomys
forelimb
fossorial adaptations
morphometry
Adaptación
Extremidades
title_short Forelimb proportions and fossorial adaptations in the scratch-digging rodent <i>Ctenomys</i> (Caviomorpha)
title_full Forelimb proportions and fossorial adaptations in the scratch-digging rodent <i>Ctenomys</i> (Caviomorpha)
title_fullStr Forelimb proportions and fossorial adaptations in the scratch-digging rodent <i>Ctenomys</i> (Caviomorpha)
title_full_unstemmed Forelimb proportions and fossorial adaptations in the scratch-digging rodent <i>Ctenomys</i> (Caviomorpha)
title_sort Forelimb proportions and fossorial adaptations in the scratch-digging rodent <i>Ctenomys</i> (Caviomorpha)
dc.creator.none.fl_str_mv Elissamburu, Andrea
De Santis, Luciano José María
author Elissamburu, Andrea
author_facet Elissamburu, Andrea
De Santis, Luciano José María
author_role author
author2 De Santis, Luciano José María
author2_role author
dc.subject.none.fl_str_mv Zoología
Ciencias Naturales
Ctenomys
forelimb
fossorial adaptations
morphometry
Adaptación
Extremidades
topic Zoología
Ciencias Naturales
Ctenomys
forelimb
fossorial adaptations
morphometry
Adaptación
Extremidades
dc.description.none.fl_txt_mv Members of the genus <i>Ctenomys</i> (tuco-tuco; Rodentia: Caviomorpha: Octodontidae) are considered scratch diggers. We compared the forelimbs of adult <i>C. azarae</i> with those of 13 species within other genera of caviomorph rodents to identify morphofunctional variation in osseous elements related to fossorial habits. Eight measurements of the humerus and ulna were used to construct five functional indices that were subjected to principal components analysis and simple comparisons among means. <i>Ctenomys</i> has a general morphology similar to that of terrestrial caviomorph rodents but exhibits some features that reflect its specialized fossorial condition, such as its comparatively large epicondyles. These features indicate greater muscular development and capacity for force production in the pronators and supinators of the forelimb and manus and flexors of the manus. The deltoid complex is well developed, indicating a large moment arm for the deltoid and latissimus dorsi muscles, which increases the capacity for force production on humeral flexion. Humeral indices are the best for differentiating fossorial forms from diggers, occasional diggers, generalized, and cursorial forms. Limb bone segments are used differently by highly fossorial and scratch-digging forms.
Facultad de Ciencias Naturales y Museo
description Members of the genus <i>Ctenomys</i> (tuco-tuco; Rodentia: Caviomorpha: Octodontidae) are considered scratch diggers. We compared the forelimbs of adult <i>C. azarae</i> with those of 13 species within other genera of caviomorph rodents to identify morphofunctional variation in osseous elements related to fossorial habits. Eight measurements of the humerus and ulna were used to construct five functional indices that were subjected to principal components analysis and simple comparisons among means. <i>Ctenomys</i> has a general morphology similar to that of terrestrial caviomorph rodents but exhibits some features that reflect its specialized fossorial condition, such as its comparatively large epicondyles. These features indicate greater muscular development and capacity for force production in the pronators and supinators of the forelimb and manus and flexors of the manus. The deltoid complex is well developed, indicating a large moment arm for the deltoid and latissimus dorsi muscles, which increases the capacity for force production on humeral flexion. Humeral indices are the best for differentiating fossorial forms from diggers, occasional diggers, generalized, and cursorial forms. Limb bone segments are used differently by highly fossorial and scratch-digging forms.
publishDate 2011
dc.date.none.fl_str_mv 2011-06-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/84133
url http://sedici.unlp.edu.ar/handle/10915/84133
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0022-2372
info:eu-repo/semantics/altIdentifier/doi/10.1644/09-mamm-a-113.1
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
683-689
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
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