Synsacra of the Eocene Antarctic penguins: new data on spinal maturation and an insight into their role in the control of walking
Abstract The synsacrum is an important element of the axial skeleton in birds, both volant and flightless. Little is known about the maturation of this complex bone in penguins. In this work, the supposedly ontogenetically youngest known synsacrum of early penguins was described. The analysis of thi...
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Walter de Gruyter GmbH
2014
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Online Access: | http://dx.doi.org/10.2478/popore-2014-0005 http://content.sciendo.com/view/journals/popore/35/1/article-p27.xml https://www.degruyter.com/view/j/popore.2014.35.issue-1/popore-2014-0005/popore-2014-0005.pdf |
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crdegruyter:10.2478/popore-2014-0005 2023-05-15T14:07:24+02:00 Synsacra of the Eocene Antarctic penguins: new data on spinal maturation and an insight into their role in the control of walking Jadwiszczak, Piotr 2014 http://dx.doi.org/10.2478/popore-2014-0005 http://content.sciendo.com/view/journals/popore/35/1/article-p27.xml https://www.degruyter.com/view/j/popore.2014.35.issue-1/popore-2014-0005/popore-2014-0005.pdf unknown Walter de Gruyter GmbH http://creativecommons.org/licenses/by-nc-nd/3.0/ CC-BY-NC-ND Polish Polar Research volume 35, issue 1, page 27-39 ISSN 2081-8262 0138-0338 Ecology Ecology, Evolution, Behavior and Systematics journal-article 2014 crdegruyter https://doi.org/10.2478/popore-2014-0005 2022-04-14T05:05:26Z Abstract The synsacrum is an important element of the axial skeleton in birds, both volant and flightless. Little is known about the maturation of this complex bone in penguins. In this work, the supposedly ontogenetically youngest known synsacrum of early penguins was described. The analysis of this specimen, collected within the Eocene La Meseta Formation of Seymour (Marambio) Island, Antarctic Peninsula, revealed that this bird had attained at least the fledging stage of growth. Studies of three mature synsacra recovered from the same formation focused on the synsacral canals and, using indirect reasoning, their contents. These analyses revealed that the lumbosacral intumescence of the spinal cord and its extensions, the transverse canals, had been developed roughly like those in extant penguins (and also swifts and cormorants). The neural spine extensions (a non−nervous tissue) tracing the transverse grooves of the dorsal wall of the synsacral canal are currently considered as involved in the control of walking. The presented data suggest that such a sense organ gained its current penguin configuration by the late Eocene. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Polar Research De Gruyter (via Crossref) Antarctic Antarctic Peninsula Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Marambio ENVELOPE(-56.750,-56.750,-64.283,-64.283) Polish Polar Research 35 1 27 39 |
institution |
Open Polar |
collection |
De Gruyter (via Crossref) |
op_collection_id |
crdegruyter |
language |
unknown |
topic |
Ecology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology Ecology, Evolution, Behavior and Systematics Jadwiszczak, Piotr Synsacra of the Eocene Antarctic penguins: new data on spinal maturation and an insight into their role in the control of walking |
topic_facet |
Ecology Ecology, Evolution, Behavior and Systematics |
description |
Abstract The synsacrum is an important element of the axial skeleton in birds, both volant and flightless. Little is known about the maturation of this complex bone in penguins. In this work, the supposedly ontogenetically youngest known synsacrum of early penguins was described. The analysis of this specimen, collected within the Eocene La Meseta Formation of Seymour (Marambio) Island, Antarctic Peninsula, revealed that this bird had attained at least the fledging stage of growth. Studies of three mature synsacra recovered from the same formation focused on the synsacral canals and, using indirect reasoning, their contents. These analyses revealed that the lumbosacral intumescence of the spinal cord and its extensions, the transverse canals, had been developed roughly like those in extant penguins (and also swifts and cormorants). The neural spine extensions (a non−nervous tissue) tracing the transverse grooves of the dorsal wall of the synsacral canal are currently considered as involved in the control of walking. The presented data suggest that such a sense organ gained its current penguin configuration by the late Eocene. |
format |
Article in Journal/Newspaper |
author |
Jadwiszczak, Piotr |
author_facet |
Jadwiszczak, Piotr |
author_sort |
Jadwiszczak, Piotr |
title |
Synsacra of the Eocene Antarctic penguins: new data on spinal maturation and an insight into their role in the control of walking |
title_short |
Synsacra of the Eocene Antarctic penguins: new data on spinal maturation and an insight into their role in the control of walking |
title_full |
Synsacra of the Eocene Antarctic penguins: new data on spinal maturation and an insight into their role in the control of walking |
title_fullStr |
Synsacra of the Eocene Antarctic penguins: new data on spinal maturation and an insight into their role in the control of walking |
title_full_unstemmed |
Synsacra of the Eocene Antarctic penguins: new data on spinal maturation and an insight into their role in the control of walking |
title_sort |
synsacra of the eocene antarctic penguins: new data on spinal maturation and an insight into their role in the control of walking |
publisher |
Walter de Gruyter GmbH |
publishDate |
2014 |
url |
http://dx.doi.org/10.2478/popore-2014-0005 http://content.sciendo.com/view/journals/popore/35/1/article-p27.xml https://www.degruyter.com/view/j/popore.2014.35.issue-1/popore-2014-0005/popore-2014-0005.pdf |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
geographic |
Antarctic Antarctic Peninsula Seymour Marambio |
geographic_facet |
Antarctic Antarctic Peninsula Seymour Marambio |
genre |
Antarc* Antarctic Antarctic Peninsula Polar Research |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Polar Research |
op_source |
Polish Polar Research volume 35, issue 1, page 27-39 ISSN 2081-8262 0138-0338 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/3.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.2478/popore-2014-0005 |
container_title |
Polish Polar Research |
container_volume |
35 |
container_issue |
1 |
container_start_page |
27 |
op_container_end_page |
39 |
_version_ |
1766279300452974592 |