New crania from Seymour Island (Antarctica) shed light on anatomy of Eocene penguins

Antarctic skulls attributable to fossil penguins are rare. Three new penguin crania from Antarctica are here described providing an insight into their feeding function. One of the specimens studied is largely a natural endocast, slightly damaged, and lacking preserved osteological details. Two other...

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Detalles Bibliográficos
Autor principal: Acosta Hospitaleche, Carolina Ileana Alicia
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Naturales
Antarctica
Sphenisciformes
Crania
La Meseta Formation
Late Eocene
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/102061
https://ri.conicet.gov.ar/11336/23661
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-102061
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Antarctica
Sphenisciformes
Crania
La Meseta Formation
Late Eocene
spellingShingle Ciencias Naturales
Antarctica
Sphenisciformes
Crania
La Meseta Formation
Late Eocene
Acosta Hospitaleche, Carolina Ileana Alicia
New crania from Seymour Island (Antarctica) shed light on anatomy of Eocene penguins
topic_facet Ciencias Naturales
Antarctica
Sphenisciformes
Crania
La Meseta Formation
Late Eocene
description Antarctic skulls attributable to fossil penguins are rare. Three new penguin crania from Antarctica are here described providing an insight into their feeding function. One of the specimens studied is largely a natural endocast, slightly damaged, and lacking preserved osteological details. Two other specimens are the best preserved fossil penguin crania from Antarctica, enabling the study of characters not observed so far. All of them come from the uppermost Submeseta Allomember of the La Meseta Formation (Eocene–?Oligocene), Seymour (Marambio) Island, Antarctic Peninsula. The results of the comparative studies suggest that Paleogene penguins were long−skulled birds, with strong nuchal crests and deep temporal fossae. The configuration of the nuchal crests, the temporal fossae, and the parasphenoidal processes, appears to indicate the presence of powerful muscles. The nasal gland sulcus devoid of a supraorbital edge is typical of piscivorous species.
format Articulo
Articulo
author Acosta Hospitaleche, Carolina Ileana Alicia
author_facet Acosta Hospitaleche, Carolina Ileana Alicia
author_sort Acosta Hospitaleche, Carolina Ileana Alicia
title New crania from Seymour Island (Antarctica) shed light on anatomy of Eocene penguins
title_short New crania from Seymour Island (Antarctica) shed light on anatomy of Eocene penguins
title_full New crania from Seymour Island (Antarctica) shed light on anatomy of Eocene penguins
title_fullStr New crania from Seymour Island (Antarctica) shed light on anatomy of Eocene penguins
title_full_unstemmed New crania from Seymour Island (Antarctica) shed light on anatomy of Eocene penguins
title_sort new crania from seymour island (antarctica) shed light on anatomy of eocene penguins
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/102061
https://ri.conicet.gov.ar/11336/23661
work_keys_str_mv AT acostahospitalechecarolinaileanaalicia newcraniafromseymourislandantarcticashedlightonanatomyofeocenepenguins
bdutipo_str Repositorios
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