Devonian rhizodontids and tristichopterids (Sarcopterygii; Tetrapodomorpha) from East Gondwana
ABSTRACT Devonian rhizodontid fishes from East Gondwana include Gooloogongia loomesi Johanson & Ahlberg 1998 from near Canowindra, New South Wales (NSW), Australia and Aztecia mahalae gen. nov., sp. nov. from southern Victoria Land, Antarctica. Gooloogongia loomesi is known from well-preserved c...
Published in: | Transactions of the Royal Society of Edinburgh: Earth Sciences |
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Online Access: | http://dx.doi.org/10.1017/s0263593300000043 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0263593300000043 |
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crcambridgeupr:10.1017/s0263593300000043 2024-04-28T08:02:38+00:00 Devonian rhizodontids and tristichopterids (Sarcopterygii; Tetrapodomorpha) from East Gondwana Johanson, Zerina Ahlberg, Per E. 2001 http://dx.doi.org/10.1017/s0263593300000043 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0263593300000043 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Transactions of the Royal Society of Edinburgh: Earth Sciences volume 92, issue 1, page 43-74 ISSN 0263-5933 1473-7116 Paleontology Earth and Planetary Sciences (miscellaneous) journal-article 2001 crcambridgeupr https://doi.org/10.1017/s0263593300000043 2024-04-09T06:55:28Z ABSTRACT Devonian rhizodontid fishes from East Gondwana include Gooloogongia loomesi Johanson & Ahlberg 1998 from near Canowindra, New South Wales (NSW), Australia and Aztecia mahalae gen. nov., sp. nov. from southern Victoria Land, Antarctica. Gooloogongia loomesi is known from well-preserved cranial and postcranial material, and as such represents the most complete rhizodont known. Newly discovered elements (braincase, pelvic girdle) are described for the first time. Aztecia mahalae gen. nov., sp. nov. is based on shoulder girdle material formerly assigned to Notorhizodon Young et al. 1992, which, based on skull and lower jaw morphology, is a member of the Tristichopteridae. The presence of several plesiomorphic characters suggests that Gooloogongia occupies a basal phylogenetic position within the Rhizodontida, while Aztecia n. gen. possesses a more derived shoulder girdle. We argue that the Rhizodontida evolved on the Gondwanan landmass. Notorhizodon occupies a relatively derived position within the Tristichopteridae, but is contemporary with the earliest and phylogenetically most basal Laurussian members of the group. This shows that the tristichopterids achieved a worldwide distribution considerably earlier than previously thought. Article in Journal/Newspaper Antarc* Antarctica Victoria Land Cambridge University Press Transactions of the Royal Society of Edinburgh: Earth Sciences 92 1 43 74 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Paleontology Earth and Planetary Sciences (miscellaneous) |
spellingShingle |
Paleontology Earth and Planetary Sciences (miscellaneous) Johanson, Zerina Ahlberg, Per E. Devonian rhizodontids and tristichopterids (Sarcopterygii; Tetrapodomorpha) from East Gondwana |
topic_facet |
Paleontology Earth and Planetary Sciences (miscellaneous) |
description |
ABSTRACT Devonian rhizodontid fishes from East Gondwana include Gooloogongia loomesi Johanson & Ahlberg 1998 from near Canowindra, New South Wales (NSW), Australia and Aztecia mahalae gen. nov., sp. nov. from southern Victoria Land, Antarctica. Gooloogongia loomesi is known from well-preserved cranial and postcranial material, and as such represents the most complete rhizodont known. Newly discovered elements (braincase, pelvic girdle) are described for the first time. Aztecia mahalae gen. nov., sp. nov. is based on shoulder girdle material formerly assigned to Notorhizodon Young et al. 1992, which, based on skull and lower jaw morphology, is a member of the Tristichopteridae. The presence of several plesiomorphic characters suggests that Gooloogongia occupies a basal phylogenetic position within the Rhizodontida, while Aztecia n. gen. possesses a more derived shoulder girdle. We argue that the Rhizodontida evolved on the Gondwanan landmass. Notorhizodon occupies a relatively derived position within the Tristichopteridae, but is contemporary with the earliest and phylogenetically most basal Laurussian members of the group. This shows that the tristichopterids achieved a worldwide distribution considerably earlier than previously thought. |
format |
Article in Journal/Newspaper |
author |
Johanson, Zerina Ahlberg, Per E. |
author_facet |
Johanson, Zerina Ahlberg, Per E. |
author_sort |
Johanson, Zerina |
title |
Devonian rhizodontids and tristichopterids (Sarcopterygii; Tetrapodomorpha) from East Gondwana |
title_short |
Devonian rhizodontids and tristichopterids (Sarcopterygii; Tetrapodomorpha) from East Gondwana |
title_full |
Devonian rhizodontids and tristichopterids (Sarcopterygii; Tetrapodomorpha) from East Gondwana |
title_fullStr |
Devonian rhizodontids and tristichopterids (Sarcopterygii; Tetrapodomorpha) from East Gondwana |
title_full_unstemmed |
Devonian rhizodontids and tristichopterids (Sarcopterygii; Tetrapodomorpha) from East Gondwana |
title_sort |
devonian rhizodontids and tristichopterids (sarcopterygii; tetrapodomorpha) from east gondwana |
publisher |
Cambridge University Press (CUP) |
publishDate |
2001 |
url |
http://dx.doi.org/10.1017/s0263593300000043 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0263593300000043 |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_source |
Transactions of the Royal Society of Edinburgh: Earth Sciences volume 92, issue 1, page 43-74 ISSN 0263-5933 1473-7116 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0263593300000043 |
container_title |
Transactions of the Royal Society of Edinburgh: Earth Sciences |
container_volume |
92 |
container_issue |
1 |
container_start_page |
43 |
op_container_end_page |
74 |
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1797573927260651520 |