A Lower Carboniferous Xenacanthiform Shark from Australia
A new Early Carboniferous (Mississippian, mid-Viséan) chondrichthyan, Reginaselache morrisi, n. g., n. sp., from non- or marginal marine sandy mudstones of the Tetrapod Unit of the mid-Viséan (330 Ma = top Holkerian/basal Asbian) Ducabrook Formation, northwest of Springsure, central Queensland, is r...
Published in: | Journal of Vertebrate Paleontology |
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The Society of Vertebrate Paleontology
2011
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ftbioone:10.1080/02724634.2011.550359 2024-06-02T07:58:03+00:00 A Lower Carboniferous Xenacanthiform Shark from Australia susan turner Carole J. Burrow susan turner Carole J. Burrow world 2011-03-01 text/HTML https://doi.org/10.1080/02724634.2011.550359 en eng The Society of Vertebrate Paleontology doi:10.1080/02724634.2011.550359 All rights reserved. https://doi.org/10.1080/02724634.2011.550359 Text 2011 ftbioone https://doi.org/10.1080/02724634.2011.550359 2024-05-07T00:50:56Z A new Early Carboniferous (Mississippian, mid-Viséan) chondrichthyan, Reginaselache morrisi, n. g., n. sp., from non- or marginal marine sandy mudstones of the Tetrapod Unit of the mid-Viséan (330 Ma = top Holkerian/basal Asbian) Ducabrook Formation, northwest of Springsure, central Queensland, is referred to the order Xenacanthiformes. The taxon is represented by robust diplodont teeth with multicristate cusps, a prominent rounded coronal button, and a horseshoe-shaped labial boss. Rare spine fragments from the type locality, and a partial lower jaw from a site close by are also tentatively referred to the taxon. Reginaselache morrisi was a medium-sized, ca. 1 m long shark with numerous teeth, probably feeding on smaller paleoniscoid and other fishes and/or invertebrates. Analysis of the teeth and comparison with those of other Carboniferous and later Paleozoic xenacanthiforms shows that the tooth cusp morphology is closest to those of Triodus Hampe and Bohemiacanthus Schneider. A restricted cladistic analysis of the xenacanthiforms with outgroups Leonodus Mader, Phoebodus St John and Worthen, and Antarctilamna Young supports the family Diplodoselachidae Hampe as a clade comprising just two genera, Diplodoselache and Reginaselache. Text Antarc* BioOne Online Journals Mader ENVELOPE(19.026,19.026,65.787,65.787) Queensland Journal of Vertebrate Paleontology 31 2 241 257 |
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BioOne Online Journals |
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ftbioone |
language |
English |
description |
A new Early Carboniferous (Mississippian, mid-Viséan) chondrichthyan, Reginaselache morrisi, n. g., n. sp., from non- or marginal marine sandy mudstones of the Tetrapod Unit of the mid-Viséan (330 Ma = top Holkerian/basal Asbian) Ducabrook Formation, northwest of Springsure, central Queensland, is referred to the order Xenacanthiformes. The taxon is represented by robust diplodont teeth with multicristate cusps, a prominent rounded coronal button, and a horseshoe-shaped labial boss. Rare spine fragments from the type locality, and a partial lower jaw from a site close by are also tentatively referred to the taxon. Reginaselache morrisi was a medium-sized, ca. 1 m long shark with numerous teeth, probably feeding on smaller paleoniscoid and other fishes and/or invertebrates. Analysis of the teeth and comparison with those of other Carboniferous and later Paleozoic xenacanthiforms shows that the tooth cusp morphology is closest to those of Triodus Hampe and Bohemiacanthus Schneider. A restricted cladistic analysis of the xenacanthiforms with outgroups Leonodus Mader, Phoebodus St John and Worthen, and Antarctilamna Young supports the family Diplodoselachidae Hampe as a clade comprising just two genera, Diplodoselache and Reginaselache. |
author2 |
susan turner Carole J. Burrow |
format |
Text |
author |
susan turner Carole J. Burrow |
spellingShingle |
susan turner Carole J. Burrow A Lower Carboniferous Xenacanthiform Shark from Australia |
author_facet |
susan turner Carole J. Burrow |
author_sort |
susan turner |
title |
A Lower Carboniferous Xenacanthiform Shark from Australia |
title_short |
A Lower Carboniferous Xenacanthiform Shark from Australia |
title_full |
A Lower Carboniferous Xenacanthiform Shark from Australia |
title_fullStr |
A Lower Carboniferous Xenacanthiform Shark from Australia |
title_full_unstemmed |
A Lower Carboniferous Xenacanthiform Shark from Australia |
title_sort |
lower carboniferous xenacanthiform shark from australia |
publisher |
The Society of Vertebrate Paleontology |
publishDate |
2011 |
url |
https://doi.org/10.1080/02724634.2011.550359 |
op_coverage |
world |
long_lat |
ENVELOPE(19.026,19.026,65.787,65.787) |
geographic |
Mader Queensland |
geographic_facet |
Mader Queensland |
genre |
Antarc* |
genre_facet |
Antarc* |
op_source |
https://doi.org/10.1080/02724634.2011.550359 |
op_relation |
doi:10.1080/02724634.2011.550359 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1080/02724634.2011.550359 |
container_title |
Journal of Vertebrate Paleontology |
container_volume |
31 |
container_issue |
2 |
container_start_page |
241 |
op_container_end_page |
257 |
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1800741304299159552 |