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.
Fil: Acosta Hospitaleche, Carolina Ileana Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
Fil: Di Carlo, Ulises. Instituto Superior Juan N. Terrero; Argentina
Materia
Spheniscidae
Eocene
Antarctica
Functional Morphology
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/75949
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of AntarcticaAcosta Hospitaleche, Carolina Ileana AliciaDi Carlo, UlisesSpheniscidaeEoceneAntarcticaFunctional Morphologyhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Penguins 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.Fil: Acosta Hospitaleche, Carolina Ileana Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; ArgentinaFil: Di Carlo, Ulises. Instituto Superior Juan N. Terrero; ArgentinaUniversità degli Studi di Milano2012-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/mswordapplication/pdfhttp://hdl.handle.net/11336/75949Acosta Hospitaleche, Carolina Ileana Alicia; Di Carlo, Ulises; Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica; Università degli Studi di Milano; Rivista Italiana Di Paleontologia E Stratigrafia; 118; 3; 3-2012; 493-5010035-6883CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://riviste.unimi.it/index.php/RIPS/article/view/6016info:eu-repo/semantics/altIdentifier/doi/10.13130/2039-4942/6016info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:22:34Zoai:ri.conicet.gov.ar:11336/75949instacron: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:34982025-09-29 10:22:35.271CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
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
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 Spheniscidae
Eocene
Antarctica
Functional Morphology
topic Spheniscidae
Eocene
Antarctica
Functional Morphology
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
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.
Fil: Acosta Hospitaleche, Carolina Ileana Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
Fil: Di Carlo, Ulises. Instituto Superior Juan N. Terrero; Argentina
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
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/11336/75949
Acosta Hospitaleche, Carolina Ileana Alicia; Di Carlo, Ulises; Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica; Università degli Studi di Milano; Rivista Italiana Di Paleontologia E Stratigrafia; 118; 3; 3-2012; 493-501
0035-6883
CONICET Digital
CONICET
url http://hdl.handle.net/11336/75949
identifier_str_mv Acosta Hospitaleche, Carolina Ileana Alicia; Di Carlo, Ulises; Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica; Università degli Studi di Milano; Rivista Italiana Di Paleontologia E Stratigrafia; 118; 3; 3-2012; 493-501
0035-6883
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://riviste.unimi.it/index.php/RIPS/article/view/6016
info:eu-repo/semantics/altIdentifier/doi/10.13130/2039-4942/6016
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/msword
application/pdf
dc.publisher.none.fl_str_mv Università degli Studi di Milano
publisher.none.fl_str_mv Università degli Studi di Milano
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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score 13.070432

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