Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica

Autores
Acosta Hospitaleche, Carolina Ileana Alicia; Di Carlo, Ulises
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Penguins have peculiar modifications in their skeletal anatomy as a consequence of their extremely specialized diving habit. Morphological specialization is particularly evident in the forelimb. However, the kinematics of the pectoral girdle appears to be key to the locomotion of penguins. Penguin scapulae have an unusual morphology among birds. Modern penguins have a very large (especially broad) scapula, whereas this bone is long but narrower in basal fossil species. The recent finding of an incomplete scapula with a singular acromion in the Upper Eocene Submeseta Allomember of the La Meseta Formation Peninsula (Antarctica) in the Antarctic Peninsula reveals a scapula proportionally narrower than those of modern penguins but similar to that of Waimanu and possibly other Eocene species. Osteological comparisons and muscular dissections of modern penguins show that the most striking feature is the curvature of the acromion, and the consequent enlargement of the facies articularis clavicularis. The configuration of the acromion and the corpus scapula reflects a lack of functional optimization in terms of the resistance to forces transverse to the body axis.The scapula´s general morphology suggests it belonged to a medium to large-sized penguin species with no so specialized diving skills.
Facultad de Ciencias Naturales y Museo
Consejo Nacional de Investigaciones Científicas y Técnicas
Materia
Ciencias Naturales
Spheniscidae
Eocene
Antarctica
Functional morphology
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:10915/96237
Acceder
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network_name_str SEDICI (UNLP)
spelling Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of AntarcticaAcosta Hospitaleche, Carolina Ileana AliciaDi Carlo, UlisesCiencias NaturalesSpheniscidaeEoceneAntarcticaFunctional morphologyPenguins have peculiar modifications in their skeletal anatomy as a consequence of their extremely specialized diving habit. Morphological specialization is particularly evident in the forelimb. However, the kinematics of the pectoral girdle appears to be key to the locomotion of penguins. Penguin scapulae have an unusual morphology among birds. Modern penguins have a very large (especially broad) scapula, whereas this bone is long but narrower in basal fossil species. The recent finding of an incomplete scapula with a singular acromion in the Upper Eocene Submeseta Allomember of the La Meseta Formation Peninsula (Antarctica) in the Antarctic Peninsula reveals a scapula proportionally narrower than those of modern penguins but similar to that of Waimanu and possibly other Eocene species. Osteological comparisons and muscular dissections of modern penguins show that the most striking feature is the curvature of the acromion, and the consequent enlargement of the facies articularis clavicularis. The configuration of the acromion and the corpus scapula reflects a lack of functional optimization in terms of the resistance to forces transverse to the body axis.The scapula´s general morphology suggests it belonged to a medium to large-sized penguin species with no so specialized diving skills.Facultad de Ciencias Naturales y MuseoConsejo Nacional de Investigaciones Científicas y Técnicas2012-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf493-501http://sedici.unlp.edu.ar/handle/10915/96237enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/75949info:eu-repo/semantics/altIdentifier/url/https://riviste.unimi.it/index.php/RIPS/article/view/6016info:eu-repo/semantics/altIdentifier/issn/0035-6883info:eu-repo/semantics/altIdentifier/doi/10.13130/2039-4942/6016info:eu-repo/semantics/altIdentifier/hdl/11336/75949info: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:UNLP2025-09-29T11:20:21Zoai:sedici.unlp.edu.ar:10915/96237Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:20:22.183SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica
title Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica
spellingShingle Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica
Acosta Hospitaleche, Carolina Ileana Alicia
Ciencias Naturales
Spheniscidae
Eocene
Antarctica
Functional morphology
title_short Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica
title_full Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica
title_fullStr Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica
title_full_unstemmed Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica
title_sort Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica
dc.creator.none.fl_str_mv Acosta Hospitaleche, Carolina Ileana Alicia
Di Carlo, Ulises
author Acosta Hospitaleche, Carolina Ileana Alicia
author_facet Acosta Hospitaleche, Carolina Ileana Alicia
Di Carlo, Ulises
author_role author
author2 Di Carlo, Ulises
author2_role author
dc.subject.none.fl_str_mv Ciencias Naturales
Spheniscidae
Eocene
Antarctica
Functional morphology
topic Ciencias Naturales
Spheniscidae
Eocene
Antarctica
Functional morphology
dc.description.none.fl_txt_mv Penguins have peculiar modifications in their skeletal anatomy as a consequence of their extremely specialized diving habit. Morphological specialization is particularly evident in the forelimb. However, the kinematics of the pectoral girdle appears to be key to the locomotion of penguins. Penguin scapulae have an unusual morphology among birds. Modern penguins have a very large (especially broad) scapula, whereas this bone is long but narrower in basal fossil species. The recent finding of an incomplete scapula with a singular acromion in the Upper Eocene Submeseta Allomember of the La Meseta Formation Peninsula (Antarctica) in the Antarctic Peninsula reveals a scapula proportionally narrower than those of modern penguins but similar to that of Waimanu and possibly other Eocene species. Osteological comparisons and muscular dissections of modern penguins show that the most striking feature is the curvature of the acromion, and the consequent enlargement of the facies articularis clavicularis. The configuration of the acromion and the corpus scapula reflects a lack of functional optimization in terms of the resistance to forces transverse to the body axis.The scapula´s general morphology suggests it belonged to a medium to large-sized penguin species with no so specialized diving skills.
Facultad de Ciencias Naturales y Museo
Consejo Nacional de Investigaciones Científicas y Técnicas
description Penguins have peculiar modifications in their skeletal anatomy as a consequence of their extremely specialized diving habit. Morphological specialization is particularly evident in the forelimb. However, the kinematics of the pectoral girdle appears to be key to the locomotion of penguins. Penguin scapulae have an unusual morphology among birds. Modern penguins have a very large (especially broad) scapula, whereas this bone is long but narrower in basal fossil species. The recent finding of an incomplete scapula with a singular acromion in the Upper Eocene Submeseta Allomember of the La Meseta Formation Peninsula (Antarctica) in the Antarctic Peninsula reveals a scapula proportionally narrower than those of modern penguins but similar to that of Waimanu and possibly other Eocene species. Osteological comparisons and muscular dissections of modern penguins show that the most striking feature is the curvature of the acromion, and the consequent enlargement of the facies articularis clavicularis. The configuration of the acromion and the corpus scapula reflects a lack of functional optimization in terms of the resistance to forces transverse to the body axis.The scapula´s general morphology suggests it belonged to a medium to large-sized penguin species with no so specialized diving skills.
publishDate 2012
dc.date.none.fl_str_mv 2012-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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info:ar-repo/semantics/articulo
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status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/96237
url http://sedici.unlp.edu.ar/handle/10915/96237
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/75949
info:eu-repo/semantics/altIdentifier/url/https://riviste.unimi.it/index.php/RIPS/article/view/6016
info:eu-repo/semantics/altIdentifier/issn/0035-6883
info:eu-repo/semantics/altIdentifier/doi/10.13130/2039-4942/6016
info:eu-repo/semantics/altIdentifier/hdl/11336/75949
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
493-501
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collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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