An Early Miocene kentriodontoid (Cetacea: Odontoceti) from the western North Pacific, and its implications for their phylogeny and paleobiogeography

So–called ‘kentriodontids’ are extinct dolphin–like odontocetes known from the Early to Late Miocene worldwide. Although recent studies have proposed that they were monophyletic, their taxonomic relationships still remain controversial. Such a controversy exists partly because of the predominance of...

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Published in:PLOS ONE
Main Authors: Guo, Zixuan, Kohno, Naoki
Other Authors: Pandolfi, Luca
Format: Article in Journal/Newspaper
Language:English
Published: Public Library of Science (PLoS) 2023
Subjects:
Online Access:http://dx.doi.org/10.1371/journal.pone.0280218
https://dx.plos.org/10.1371/journal.pone.0280218
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spelling crplos:10.1371/journal.pone.0280218 2024-05-19T07:45:10+00:00 An Early Miocene kentriodontoid (Cetacea: Odontoceti) from the western North Pacific, and its implications for their phylogeny and paleobiogeography Guo, Zixuan Kohno, Naoki Pandolfi, Luca 2023 http://dx.doi.org/10.1371/journal.pone.0280218 https://dx.plos.org/10.1371/journal.pone.0280218 en eng Public Library of Science (PLoS) http://creativecommons.org/licenses/by/4.0/ PLOS ONE volume 18, issue 2, page e0280218 ISSN 1932-6203 journal-article 2023 crplos https://doi.org/10.1371/journal.pone.0280218 2024-05-01T06:59:45Z So–called ‘kentriodontids’ are extinct dolphin–like odontocetes known from the Early to Late Miocene worldwide. Although recent studies have proposed that they were monophyletic, their taxonomic relationships still remain controversial. Such a controversy exists partly because of the predominance of primitive morphologies in this taxon, but the fact is that quite a few ‘kentriodontids’ are known only from fragmentary skulls and/or isolated periotics. A new ‘kentriodontid’ Platysvercus ugonis gen. et sp. nov. is described based on a nearly complete skull from the upper Lower Miocene Sugota Formation, Akita Prefecture, northern Japan. Based on the phylogenetic analysis of P . ugonis described here, the monophyly of the ‘kentriodontids’ is confirmed, and it is recognized as the superfamily Kentriodontoidea. This new superfamily is subdivided into two families as new ranks: Kentriodontidae and Lophocetidae. Based on the paleobiogeographic analysis of the Kentriodontoidea, their common ancestor emerged in the North Pacific Ocean and spread over the Northern Hemisphere. Initial diversification of the Kentriodontidae in the North Pacific Ocean and the Lophocetidae in the North Atlantic Ocean was recognized as a vicariance event. The diversification and extinction of the Kentriodontoidea could have been synchronously influenced by climate events during the Middle Miocene. Article in Journal/Newspaper North Atlantic PLOS PLOS ONE 18 2 e0280218
institution Open Polar
collection PLOS
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language English
description So–called ‘kentriodontids’ are extinct dolphin–like odontocetes known from the Early to Late Miocene worldwide. Although recent studies have proposed that they were monophyletic, their taxonomic relationships still remain controversial. Such a controversy exists partly because of the predominance of primitive morphologies in this taxon, but the fact is that quite a few ‘kentriodontids’ are known only from fragmentary skulls and/or isolated periotics. A new ‘kentriodontid’ Platysvercus ugonis gen. et sp. nov. is described based on a nearly complete skull from the upper Lower Miocene Sugota Formation, Akita Prefecture, northern Japan. Based on the phylogenetic analysis of P . ugonis described here, the monophyly of the ‘kentriodontids’ is confirmed, and it is recognized as the superfamily Kentriodontoidea. This new superfamily is subdivided into two families as new ranks: Kentriodontidae and Lophocetidae. Based on the paleobiogeographic analysis of the Kentriodontoidea, their common ancestor emerged in the North Pacific Ocean and spread over the Northern Hemisphere. Initial diversification of the Kentriodontidae in the North Pacific Ocean and the Lophocetidae in the North Atlantic Ocean was recognized as a vicariance event. The diversification and extinction of the Kentriodontoidea could have been synchronously influenced by climate events during the Middle Miocene.
author2 Pandolfi, Luca
format Article in Journal/Newspaper
author Guo, Zixuan
Kohno, Naoki
spellingShingle Guo, Zixuan
Kohno, Naoki
An Early Miocene kentriodontoid (Cetacea: Odontoceti) from the western North Pacific, and its implications for their phylogeny and paleobiogeography
author_facet Guo, Zixuan
Kohno, Naoki
author_sort Guo, Zixuan
title An Early Miocene kentriodontoid (Cetacea: Odontoceti) from the western North Pacific, and its implications for their phylogeny and paleobiogeography
title_short An Early Miocene kentriodontoid (Cetacea: Odontoceti) from the western North Pacific, and its implications for their phylogeny and paleobiogeography
title_full An Early Miocene kentriodontoid (Cetacea: Odontoceti) from the western North Pacific, and its implications for their phylogeny and paleobiogeography
title_fullStr An Early Miocene kentriodontoid (Cetacea: Odontoceti) from the western North Pacific, and its implications for their phylogeny and paleobiogeography
title_full_unstemmed An Early Miocene kentriodontoid (Cetacea: Odontoceti) from the western North Pacific, and its implications for their phylogeny and paleobiogeography
title_sort early miocene kentriodontoid (cetacea: odontoceti) from the western north pacific, and its implications for their phylogeny and paleobiogeography
publisher Public Library of Science (PLoS)
publishDate 2023
url http://dx.doi.org/10.1371/journal.pone.0280218
https://dx.plos.org/10.1371/journal.pone.0280218
genre North Atlantic
genre_facet North Atlantic
op_source PLOS ONE
volume 18, issue 2, page e0280218
ISSN 1932-6203
op_rights http://creativecommons.org/licenses/by/4.0/
op_doi https://doi.org/10.1371/journal.pone.0280218
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