New specimens and species of the Oligocene toothed baleen whale Coronodon from South Carolina and the origin of Neoceti
Baleen whales (Mysticeti) are gigantic filter-feeding cetaceans possessing the unique soft tissue structure baleen and lacking adult teeth; Oligocene fossils have revealed a wealth of early diverging tooth-bearing mysticetes highlighting the transition from archaeocete ancestors to early toothless b...
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crpeerj:10.7717/peerj.14795 2024-10-06T13:47:32+00:00 New specimens and species of the Oligocene toothed baleen whale Coronodon from South Carolina and the origin of Neoceti Boessenecker, Robert W. Beatty, Brian L. Geisler, Jonathan H. National Science Foundation 2023 http://dx.doi.org/10.7717/peerj.14795 https://peerj.com/articles/14795.pdf https://peerj.com/articles/14795.xml https://peerj.com/articles/14795.html en eng PeerJ https://creativecommons.org/licenses/by/4.0/ PeerJ volume 11, page e14795 ISSN 2167-8359 journal-article 2023 crpeerj https://doi.org/10.7717/peerj.14795 2024-09-09T06:00:24Z Baleen whales (Mysticeti) are gigantic filter-feeding cetaceans possessing the unique soft tissue structure baleen and lacking adult teeth; Oligocene fossils have revealed a wealth of early diverging tooth-bearing mysticetes highlighting the transition from archaeocete ancestors to early toothless baleen-bearing eomysticetid whales. The archaeocete-like, toothed mysticete Coronodon havensteini from the lower Oligocene Ashley Formation of South Carolina possesses a number of peculiar aspects of feeding morphology suggesting dental filter-feeding in the earliest diverging mysticete lineage. New fossils of Coronodon are described in detail, including (1) supplementary description of the holotype skull and skeleton of Coronodon havensteini (2) description of two new juvenile skulls of C. havensteini and a partial skull and postcranial skeleton of an adult; (3) description of the new species Coronodon planifrons n.sp.; and (4) description of the new species Coronodon newtonorum . New specimens of Coronodon havensteini include a partial adult skeleton preserving new elements for the species including incisors, numerous upper premolars and molars, lower m4, scapula, lumbar, and caudal vertebrae, and two juvenile skulls with tympanoperiotics and teeth. Fossils from the overlying unit, the Chandler Bridge Formation, represent two new species: Coronodon newtonorum n. sp. and Coronodon planifrons n. sp. Coronodon newtonorum possesses a concave-up alveolar profile, a mandibular condyle elevated far above the toothrow, and a gracile periotic resembling those of juvenile C. havensteini . Coronodon planifrons n. sp. possesses a horizontal supraorbital process, successively smaller upper molars, massively inflated periotic, and longer intertemporal region. Coronodon planifrons n. sp. preserves one of the most complete vertebral columns among toothed mysticetes, indicating nine thoracic vertebrae, ten lumbar vertebrae, and at least 20 caudal vertebrae. The column exhibits a somewhat stabilized caudal peduncle with enlarged ... Article in Journal/Newspaper baleen whale baleen whales PeerJ Publishing Chandler ENVELOPE(-59.682,-59.682,-64.490,-64.490) PeerJ 11 e14795 |
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PeerJ Publishing |
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language |
English |
description |
Baleen whales (Mysticeti) are gigantic filter-feeding cetaceans possessing the unique soft tissue structure baleen and lacking adult teeth; Oligocene fossils have revealed a wealth of early diverging tooth-bearing mysticetes highlighting the transition from archaeocete ancestors to early toothless baleen-bearing eomysticetid whales. The archaeocete-like, toothed mysticete Coronodon havensteini from the lower Oligocene Ashley Formation of South Carolina possesses a number of peculiar aspects of feeding morphology suggesting dental filter-feeding in the earliest diverging mysticete lineage. New fossils of Coronodon are described in detail, including (1) supplementary description of the holotype skull and skeleton of Coronodon havensteini (2) description of two new juvenile skulls of C. havensteini and a partial skull and postcranial skeleton of an adult; (3) description of the new species Coronodon planifrons n.sp.; and (4) description of the new species Coronodon newtonorum . New specimens of Coronodon havensteini include a partial adult skeleton preserving new elements for the species including incisors, numerous upper premolars and molars, lower m4, scapula, lumbar, and caudal vertebrae, and two juvenile skulls with tympanoperiotics and teeth. Fossils from the overlying unit, the Chandler Bridge Formation, represent two new species: Coronodon newtonorum n. sp. and Coronodon planifrons n. sp. Coronodon newtonorum possesses a concave-up alveolar profile, a mandibular condyle elevated far above the toothrow, and a gracile periotic resembling those of juvenile C. havensteini . Coronodon planifrons n. sp. possesses a horizontal supraorbital process, successively smaller upper molars, massively inflated periotic, and longer intertemporal region. Coronodon planifrons n. sp. preserves one of the most complete vertebral columns among toothed mysticetes, indicating nine thoracic vertebrae, ten lumbar vertebrae, and at least 20 caudal vertebrae. The column exhibits a somewhat stabilized caudal peduncle with enlarged ... |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Boessenecker, Robert W. Beatty, Brian L. Geisler, Jonathan H. |
spellingShingle |
Boessenecker, Robert W. Beatty, Brian L. Geisler, Jonathan H. New specimens and species of the Oligocene toothed baleen whale Coronodon from South Carolina and the origin of Neoceti |
author_facet |
Boessenecker, Robert W. Beatty, Brian L. Geisler, Jonathan H. |
author_sort |
Boessenecker, Robert W. |
title |
New specimens and species of the Oligocene toothed baleen whale Coronodon from South Carolina and the origin of Neoceti |
title_short |
New specimens and species of the Oligocene toothed baleen whale Coronodon from South Carolina and the origin of Neoceti |
title_full |
New specimens and species of the Oligocene toothed baleen whale Coronodon from South Carolina and the origin of Neoceti |
title_fullStr |
New specimens and species of the Oligocene toothed baleen whale Coronodon from South Carolina and the origin of Neoceti |
title_full_unstemmed |
New specimens and species of the Oligocene toothed baleen whale Coronodon from South Carolina and the origin of Neoceti |
title_sort |
new specimens and species of the oligocene toothed baleen whale coronodon from south carolina and the origin of neoceti |
publisher |
PeerJ |
publishDate |
2023 |
url |
http://dx.doi.org/10.7717/peerj.14795 https://peerj.com/articles/14795.pdf https://peerj.com/articles/14795.xml https://peerj.com/articles/14795.html |
long_lat |
ENVELOPE(-59.682,-59.682,-64.490,-64.490) |
geographic |
Chandler |
geographic_facet |
Chandler |
genre |
baleen whale baleen whales |
genre_facet |
baleen whale baleen whales |
op_source |
PeerJ volume 11, page e14795 ISSN 2167-8359 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.7717/peerj.14795 |
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PeerJ |
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11 |
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e14795 |
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