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
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/84133
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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 |
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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 |
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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) |
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openAccess |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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