A Gigantic Sarcopterygian (Tetrapodomorph Lobe-Finned Fish) from the Upper Devonian of Gondwana (Eden, New South Wales, Australia)
Edenopteron keithcrooki gen. et sp. nov. is described from the Famennian Worange Point Formation; the holotype is amongst the largest tristichopterids and sarcopterygians documented by semi-articulated remains from the Devonian Period. The new taxon has dentary fangs and premaxillary tusks, features...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/16797 2024-01-14T09:59:34+01:00 A Gigantic Sarcopterygian (Tetrapodomorph Lobe-Finned Fish) from the Upper Devonian of Gondwana (Eden, New South Wales, Australia) Young, Ben Dunstone, Robert L. Senden, Timothy J. Young, Gavin C. http://hdl.handle.net/1885/16797 https://doi.org/10.1371/journal.pone.0053871 https://openresearch-repository.anu.edu.au/bitstream/1885/16797/4/f5625xPUB3833_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/16797/7/01_Young_A_Gigantic_Sarcopterygian_2013.pdf.jpg unknown Public Library of Science http://purl.org/au-research/grants/arc/DP0558499 http://purl.org/au-research/grants/arc/DP0772138 1932-6203 http://hdl.handle.net/1885/16797 doi:10.1371/journal.pone.0053871 https://openresearch-repository.anu.edu.au/bitstream/1885/16797/4/f5625xPUB3833_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/16797/7/01_Young_A_Gigantic_Sarcopterygian_2013.pdf.jpg © 2013 Young et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. PLoS ONE http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0053871 animals archaeology bone and bones fishes fossils geography new south wales paleontology body size Journal article ftanucanberra https://doi.org/10.1371/journal.pone.0053871 2023-12-15T09:37:32Z Edenopteron keithcrooki gen. et sp. nov. is described from the Famennian Worange Point Formation; the holotype is amongst the largest tristichopterids and sarcopterygians documented by semi-articulated remains from the Devonian Period. The new taxon has dentary fangs and premaxillary tusks, features assumed to be derived for large Northern Hemisphere tristichopterids (Eusthenodon, Hyneria, Langlieria). It resembles Eusthenodon in ornament, but is distinguished by longer proportions of the parietal compared to the post-parietal shield, and numerous differences in shape and proportions of other bones. Several characters (accessory vomers in the palate, submandibulars overlapping ventral jaw margin, scales ornamented with widely-spaced deep grooves) are recorded only in tristichopterids from East Gondwana (Australia-Antarctica). On this evidence Edenopteron gen. nov. is placed in an endemic Gondwanan subfamily Mandageriinae within the Tristichopteridae; it differs from the nominal genotype Mandageria in its larger size, less pointed skull, shape of the orbits and other skull characters. The hypothesis that tristichopterids evolved in Laurussia and later dispersed into Gondwana, and a derived subgroup of large Late Devonian genera dispersed from Gondwana, is inconsistent with the evidence of the new taxon. Using oldest fossil and most primitive clade criteria the most recent phylogeny resolves South China and Gondwana as areas of origin for all tetrapodomorphs. The immediate outgroup to tristichopterids remains unresolved - either Spodichthys from Greenland as recently proposed, or Marsdenichthys from Gondwana, earlier suggested to be the sister group to all tristichopterids. Both taxa combine two characters that do not co-occur in other tetrapodomorphs (extratemporal bone in the skull; non-cosmoid round scales with an internal boss). Recently both 'primitive' and 'derived' tristichopterids have been discovered in the late Middle Devonian of both hemispheres, implying extensive ghost lineages within the group. ... Article in Journal/Newspaper Antarc* Antarctica Greenland Australian National University: ANU Digital Collections Greenland PLoS ONE 8 3 e53871 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
animals archaeology bone and bones fishes fossils geography new south wales paleontology body size |
spellingShingle |
animals archaeology bone and bones fishes fossils geography new south wales paleontology body size Young, Ben Dunstone, Robert L. Senden, Timothy J. Young, Gavin C. A Gigantic Sarcopterygian (Tetrapodomorph Lobe-Finned Fish) from the Upper Devonian of Gondwana (Eden, New South Wales, Australia) |
topic_facet |
animals archaeology bone and bones fishes fossils geography new south wales paleontology body size |
description |
Edenopteron keithcrooki gen. et sp. nov. is described from the Famennian Worange Point Formation; the holotype is amongst the largest tristichopterids and sarcopterygians documented by semi-articulated remains from the Devonian Period. The new taxon has dentary fangs and premaxillary tusks, features assumed to be derived for large Northern Hemisphere tristichopterids (Eusthenodon, Hyneria, Langlieria). It resembles Eusthenodon in ornament, but is distinguished by longer proportions of the parietal compared to the post-parietal shield, and numerous differences in shape and proportions of other bones. Several characters (accessory vomers in the palate, submandibulars overlapping ventral jaw margin, scales ornamented with widely-spaced deep grooves) are recorded only in tristichopterids from East Gondwana (Australia-Antarctica). On this evidence Edenopteron gen. nov. is placed in an endemic Gondwanan subfamily Mandageriinae within the Tristichopteridae; it differs from the nominal genotype Mandageria in its larger size, less pointed skull, shape of the orbits and other skull characters. The hypothesis that tristichopterids evolved in Laurussia and later dispersed into Gondwana, and a derived subgroup of large Late Devonian genera dispersed from Gondwana, is inconsistent with the evidence of the new taxon. Using oldest fossil and most primitive clade criteria the most recent phylogeny resolves South China and Gondwana as areas of origin for all tetrapodomorphs. The immediate outgroup to tristichopterids remains unresolved - either Spodichthys from Greenland as recently proposed, or Marsdenichthys from Gondwana, earlier suggested to be the sister group to all tristichopterids. Both taxa combine two characters that do not co-occur in other tetrapodomorphs (extratemporal bone in the skull; non-cosmoid round scales with an internal boss). Recently both 'primitive' and 'derived' tristichopterids have been discovered in the late Middle Devonian of both hemispheres, implying extensive ghost lineages within the group. ... |
format |
Article in Journal/Newspaper |
author |
Young, Ben Dunstone, Robert L. Senden, Timothy J. Young, Gavin C. |
author_facet |
Young, Ben Dunstone, Robert L. Senden, Timothy J. Young, Gavin C. |
author_sort |
Young, Ben |
title |
A Gigantic Sarcopterygian (Tetrapodomorph Lobe-Finned Fish) from the Upper Devonian of Gondwana (Eden, New South Wales, Australia) |
title_short |
A Gigantic Sarcopterygian (Tetrapodomorph Lobe-Finned Fish) from the Upper Devonian of Gondwana (Eden, New South Wales, Australia) |
title_full |
A Gigantic Sarcopterygian (Tetrapodomorph Lobe-Finned Fish) from the Upper Devonian of Gondwana (Eden, New South Wales, Australia) |
title_fullStr |
A Gigantic Sarcopterygian (Tetrapodomorph Lobe-Finned Fish) from the Upper Devonian of Gondwana (Eden, New South Wales, Australia) |
title_full_unstemmed |
A Gigantic Sarcopterygian (Tetrapodomorph Lobe-Finned Fish) from the Upper Devonian of Gondwana (Eden, New South Wales, Australia) |
title_sort |
gigantic sarcopterygian (tetrapodomorph lobe-finned fish) from the upper devonian of gondwana (eden, new south wales, australia) |
publisher |
Public Library of Science |
url |
http://hdl.handle.net/1885/16797 https://doi.org/10.1371/journal.pone.0053871 https://openresearch-repository.anu.edu.au/bitstream/1885/16797/4/f5625xPUB3833_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/16797/7/01_Young_A_Gigantic_Sarcopterygian_2013.pdf.jpg |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Antarc* Antarctica Greenland |
genre_facet |
Antarc* Antarctica Greenland |
op_source |
PLoS ONE http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0053871 |
op_relation |
http://purl.org/au-research/grants/arc/DP0558499 http://purl.org/au-research/grants/arc/DP0772138 1932-6203 http://hdl.handle.net/1885/16797 doi:10.1371/journal.pone.0053871 https://openresearch-repository.anu.edu.au/bitstream/1885/16797/4/f5625xPUB3833_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/16797/7/01_Young_A_Gigantic_Sarcopterygian_2013.pdf.jpg |
op_rights |
© 2013 Young et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
op_doi |
https://doi.org/10.1371/journal.pone.0053871 |
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PLoS ONE |
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e53871 |
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