Late Cretaceous bioconnections between Indo-Madagascar and Antarctica: refutation of the Gunnerus Ridge causeway hypothesis
Aim To evaluate the Gunnerus Ridge land-bridge hypothesis, which postulates a Late Cretaceous causeway between eastern Antarctica and southern Madagascar allowing the passage of terrestrial vertebrates. Location Eastern Antarctica, southern Indian Ocean, Madagascar. Methods The review involves palae...
Published in: | Journal of Biogeography |
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Language: | English |
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Blackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/JBI
2011
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Online Access: | https://doi.org/10.1111/j.1365-2699.2011.02546.x http://hdl.handle.net/10722/151324 |
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ftunivhongkonghu:oai:hub.hku.hk:10722/151324 2023-05-15T13:46:34+02:00 Late Cretaceous bioconnections between Indo-Madagascar and Antarctica: refutation of the Gunnerus Ridge causeway hypothesis Krause, DW Ali, JR 2011 https://doi.org/10.1111/j.1365-2699.2011.02546.x http://hdl.handle.net/10722/151324 eng eng Blackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/JBI United Kingdom Journal of Biogeography http://www.scopus.com/mlt/select.url?eid=2-s2.0-80052782344&selection=ref&src=s&origin=recordpage Journal of Biogeography, 2011, v. 38 n. 10, p. 1855-1872 doi:10.1111/j.1365-2699.2011.02546.x 1872 198646 WOS:000295052300002 0305-0270 10 eid_2-s2.0-80052782344 1855 http://hdl.handle.net/10722/151324 38 The definitive version is available at onlinelibrary.wiley.com Dinosaurs Antarctica Conrad rise Crocodyliforms Gunnerus ridge Article 2011 ftunivhongkonghu https://doi.org/10.1111/j.1365-2699.2011.02546.x 2023-01-14T15:43:34Z Aim To evaluate the Gunnerus Ridge land-bridge hypothesis, which postulates a Late Cretaceous causeway between eastern Antarctica and southern Madagascar allowing the passage of terrestrial vertebrates. Location Eastern Antarctica, southern Indian Ocean, Madagascar. Methods The review involves palaeogeographical modelling, which draws upon geological and geophysical data, bathymetric charts, and plate tectonic reconstructions, and the evaluation of stratigraphically calibrated phylogenetic analyses to document ghost lineages of select taxa. Results The available geological and geophysical evidence indicates that eastern Antarctica's Gunnerus Ridge and southern Madagascar were separated for the entire Late Cretaceous by a vast marine expanse. In the mid-Late Cretaceous, the gap was probably punctuated by land on two intervening physiographical highs, the northern Madagascar Plateau and Conrad Rise, the latter of which, although probably large, was still separated from Antarctica's Riiser-Larsen Peninsula by c.1600km. Recent, stratigraphically calibrated phylogenies including large, terrestrial end-Cretaceous vertebrate taxa of Madagascar and the Indian subcontinent reveal long ghost lineages that extended into the Early Cretaceous. Main conclusions The view that Antarctica and Madagascar were connected by a long causeway between the Gunnerus Ridge and southern Madagascar in the Late Cretaceous, and that terrestrial vertebrates were able to colonize new frontiers using this physiographical feature, is almost certainly incorrect, as was previously demonstrated for the purported causeway between Antarctica and the Indian subcontinent across the Kerguelen Plateau. Connection across mainland Africa to account for the close relationships of several fossil and extant vertebrate taxa of Indo-Madagascar and South America is another option, although this too lacks credibility. We conclude that (1) throughout the Late Cretaceous there was no intervening, continuous causeway through Antarctica and associated land bridges ... Article in Journal/Newspaper Antarc* Antarctica University of Hong Kong: HKU Scholars Hub Conrad Rise ENVELOPE(41.000,41.000,-53.000,-53.000) Gunnerus Ridge ENVELOPE(33.750,33.750,-66.500,-66.500) Indian Kerguelen Riiser-Larsen ENVELOPE(50.667,50.667,-66.783,-66.783) Riiser-Larsen Peninsula ENVELOPE(34.000,34.000,-68.917,-68.917) Journal of Biogeography 38 10 1855 1872 |
institution |
Open Polar |
collection |
University of Hong Kong: HKU Scholars Hub |
op_collection_id |
ftunivhongkonghu |
language |
English |
topic |
Dinosaurs Antarctica Conrad rise Crocodyliforms Gunnerus ridge |
spellingShingle |
Dinosaurs Antarctica Conrad rise Crocodyliforms Gunnerus ridge Krause, DW Ali, JR Late Cretaceous bioconnections between Indo-Madagascar and Antarctica: refutation of the Gunnerus Ridge causeway hypothesis |
topic_facet |
Dinosaurs Antarctica Conrad rise Crocodyliforms Gunnerus ridge |
description |
Aim To evaluate the Gunnerus Ridge land-bridge hypothesis, which postulates a Late Cretaceous causeway between eastern Antarctica and southern Madagascar allowing the passage of terrestrial vertebrates. Location Eastern Antarctica, southern Indian Ocean, Madagascar. Methods The review involves palaeogeographical modelling, which draws upon geological and geophysical data, bathymetric charts, and plate tectonic reconstructions, and the evaluation of stratigraphically calibrated phylogenetic analyses to document ghost lineages of select taxa. Results The available geological and geophysical evidence indicates that eastern Antarctica's Gunnerus Ridge and southern Madagascar were separated for the entire Late Cretaceous by a vast marine expanse. In the mid-Late Cretaceous, the gap was probably punctuated by land on two intervening physiographical highs, the northern Madagascar Plateau and Conrad Rise, the latter of which, although probably large, was still separated from Antarctica's Riiser-Larsen Peninsula by c.1600km. Recent, stratigraphically calibrated phylogenies including large, terrestrial end-Cretaceous vertebrate taxa of Madagascar and the Indian subcontinent reveal long ghost lineages that extended into the Early Cretaceous. Main conclusions The view that Antarctica and Madagascar were connected by a long causeway between the Gunnerus Ridge and southern Madagascar in the Late Cretaceous, and that terrestrial vertebrates were able to colonize new frontiers using this physiographical feature, is almost certainly incorrect, as was previously demonstrated for the purported causeway between Antarctica and the Indian subcontinent across the Kerguelen Plateau. Connection across mainland Africa to account for the close relationships of several fossil and extant vertebrate taxa of Indo-Madagascar and South America is another option, although this too lacks credibility. We conclude that (1) throughout the Late Cretaceous there was no intervening, continuous causeway through Antarctica and associated land bridges ... |
format |
Article in Journal/Newspaper |
author |
Krause, DW Ali, JR |
author_facet |
Krause, DW Ali, JR |
author_sort |
Krause, DW |
title |
Late Cretaceous bioconnections between Indo-Madagascar and Antarctica: refutation of the Gunnerus Ridge causeway hypothesis |
title_short |
Late Cretaceous bioconnections between Indo-Madagascar and Antarctica: refutation of the Gunnerus Ridge causeway hypothesis |
title_full |
Late Cretaceous bioconnections between Indo-Madagascar and Antarctica: refutation of the Gunnerus Ridge causeway hypothesis |
title_fullStr |
Late Cretaceous bioconnections between Indo-Madagascar and Antarctica: refutation of the Gunnerus Ridge causeway hypothesis |
title_full_unstemmed |
Late Cretaceous bioconnections between Indo-Madagascar and Antarctica: refutation of the Gunnerus Ridge causeway hypothesis |
title_sort |
late cretaceous bioconnections between indo-madagascar and antarctica: refutation of the gunnerus ridge causeway hypothesis |
publisher |
Blackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/JBI |
publishDate |
2011 |
url |
https://doi.org/10.1111/j.1365-2699.2011.02546.x http://hdl.handle.net/10722/151324 |
long_lat |
ENVELOPE(41.000,41.000,-53.000,-53.000) ENVELOPE(33.750,33.750,-66.500,-66.500) ENVELOPE(50.667,50.667,-66.783,-66.783) ENVELOPE(34.000,34.000,-68.917,-68.917) |
geographic |
Conrad Rise Gunnerus Ridge Indian Kerguelen Riiser-Larsen Riiser-Larsen Peninsula |
geographic_facet |
Conrad Rise Gunnerus Ridge Indian Kerguelen Riiser-Larsen Riiser-Larsen Peninsula |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Journal of Biogeography http://www.scopus.com/mlt/select.url?eid=2-s2.0-80052782344&selection=ref&src=s&origin=recordpage Journal of Biogeography, 2011, v. 38 n. 10, p. 1855-1872 doi:10.1111/j.1365-2699.2011.02546.x 1872 198646 WOS:000295052300002 0305-0270 10 eid_2-s2.0-80052782344 1855 http://hdl.handle.net/10722/151324 38 |
op_rights |
The definitive version is available at onlinelibrary.wiley.com |
op_doi |
https://doi.org/10.1111/j.1365-2699.2011.02546.x |
container_title |
Journal of Biogeography |
container_volume |
38 |
container_issue |
10 |
container_start_page |
1855 |
op_container_end_page |
1872 |
_version_ |
1766244233392422912 |