Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica
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 s...
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ftunivlaplata:oai:sedici.unlp.edu.ar:10915/96237 2023-05-15T13:47:46+02:00 Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica Acosta Hospitaleche, Carolina Ileana Alicia Di Carlo, Ulises 2012-03 application/pdf 493-501 http://sedici.unlp.edu.ar/handle/10915/96237 https://ri.conicet.gov.ar/11336/75949 https://riviste.unimi.it/index.php/RIPS/article/view/6016 en eng Rivista Italiana di Paleontologia e Stratigrafia vol. 118, no. 3 http://sedici.unlp.edu.ar/handle/10915/96237 https://ri.conicet.gov.ar/11336/75949 https://riviste.unimi.it/index.php/RIPS/article/view/6016 issn:0035-6883 http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) CC-BY-NC-SA Ciencias Naturales Spheniscidae Eocene Antarctica Functional morphology Articulo 2012 ftunivlaplata 2020-09-27T00:01:56Z 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 Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) Antarctic Antarctic Peninsula The Antarctic |
institution |
Open Polar |
collection |
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) |
op_collection_id |
ftunivlaplata |
language |
English |
topic |
Ciencias Naturales Spheniscidae Eocene Antarctica Functional morphology |
spellingShingle |
Ciencias Naturales Spheniscidae Eocene Antarctica Functional morphology Acosta Hospitaleche, Carolina Ileana Alicia Di Carlo, Ulises Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica |
topic_facet |
Ciencias Naturales Spheniscidae Eocene Antarctica Functional morphology |
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. Facultad de Ciencias Naturales y Museo Consejo Nacional de Investigaciones Científicas y Técnicas |
format |
Article in Journal/Newspaper |
author |
Acosta Hospitaleche, Carolina Ileana Alicia Di Carlo, Ulises |
author_facet |
Acosta Hospitaleche, Carolina Ileana Alicia Di Carlo, Ulises |
author_sort |
Acosta Hospitaleche, Carolina Ileana Alicia |
title |
Functional implications of a singular penguin scapula (Aves, Sphenisciformes) from the Eocene of Antarctica |
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 |
publishDate |
2012 |
url |
http://sedici.unlp.edu.ar/handle/10915/96237 https://ri.conicet.gov.ar/11336/75949 https://riviste.unimi.it/index.php/RIPS/article/view/6016 |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_relation |
Rivista Italiana di Paleontologia e Stratigrafia vol. 118, no. 3 http://sedici.unlp.edu.ar/handle/10915/96237 https://ri.conicet.gov.ar/11336/75949 https://riviste.unimi.it/index.php/RIPS/article/view/6016 issn:0035-6883 |
op_rights |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
op_rightsnorm |
CC-BY-NC-SA |
_version_ |
1766247825159487488 |