Extensive Diversity and Disparity of the Early Miocene Platanistoids (Cetacea, Odontoceti) in the Southeastern Pacific (Chilcatay Formation, Peru)
Several aspects of the fascinating evolutionary history of toothed and baleen whales (Cetacea) are still to be clarified due to the fragmentation and discontinuity (in space and time) of the fossil record. Here we open a window on the past, describing a part of the extraordinary cetacean fossil asse...
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ftpubmed:oai:pubmedcentral.nih.gov:7151620 2023-05-15T15:37:10+02:00 Extensive Diversity and Disparity of the Early Miocene Platanistoids (Cetacea, Odontoceti) in the Southeastern Pacific (Chilcatay Formation, Peru) Bianucci, Giovanni de Muizon, Christian Urbina, Mario Lambert, Olivier 2020-03-18 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7151620/ http://www.ncbi.nlm.nih.gov/pubmed/32197480 https://doi.org/10.3390/life10030027 en eng MDPI http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7151620/ http://www.ncbi.nlm.nih.gov/pubmed/32197480 http://dx.doi.org/10.3390/life10030027 © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). CC-BY Article Text 2020 ftpubmed https://doi.org/10.3390/life10030027 2020-04-26T00:21:30Z Several aspects of the fascinating evolutionary history of toothed and baleen whales (Cetacea) are still to be clarified due to the fragmentation and discontinuity (in space and time) of the fossil record. Here we open a window on the past, describing a part of the extraordinary cetacean fossil assemblage deposited in a restricted interval of time (19–18 Ma) in the Chilcatay Formation (Peru). All the fossils here examined belong to the Platanistoidea clade as here redefined, a toothed whale group nowadays represented only by the Asian river dolphin Platanista gangetica. Two new genera and species, the hyper-longirostrine Ensidelphis riveroi and the squalodelphinid Furcacetus flexirostrum, are described together with new material referred to the squalodelphinid Notocetus vanbenedeni and fragmentary remains showing affinities with the platanistid Araeodelphis. Our cladistic analysis defines the new clade Platanidelphidi, sister-group to Allodelphinidae and including E. riveroi and the clade Squalodelphinidae + Platanistidae. The fossils here examined further confirm the high diversity and disparity of platanistoids during the early Miocene. Finally, morphofunctional considerations on the entire platanistoid assemblage of the Chilcatay Formation suggest a high trophic partitioning of this peculiar cetacean paleocommunity. Text baleen whales toothed whale PubMed Central (PMC) Pacific Life 10 3 27 |
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Article Bianucci, Giovanni de Muizon, Christian Urbina, Mario Lambert, Olivier Extensive Diversity and Disparity of the Early Miocene Platanistoids (Cetacea, Odontoceti) in the Southeastern Pacific (Chilcatay Formation, Peru) |
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Article |
description |
Several aspects of the fascinating evolutionary history of toothed and baleen whales (Cetacea) are still to be clarified due to the fragmentation and discontinuity (in space and time) of the fossil record. Here we open a window on the past, describing a part of the extraordinary cetacean fossil assemblage deposited in a restricted interval of time (19–18 Ma) in the Chilcatay Formation (Peru). All the fossils here examined belong to the Platanistoidea clade as here redefined, a toothed whale group nowadays represented only by the Asian river dolphin Platanista gangetica. Two new genera and species, the hyper-longirostrine Ensidelphis riveroi and the squalodelphinid Furcacetus flexirostrum, are described together with new material referred to the squalodelphinid Notocetus vanbenedeni and fragmentary remains showing affinities with the platanistid Araeodelphis. Our cladistic analysis defines the new clade Platanidelphidi, sister-group to Allodelphinidae and including E. riveroi and the clade Squalodelphinidae + Platanistidae. The fossils here examined further confirm the high diversity and disparity of platanistoids during the early Miocene. Finally, morphofunctional considerations on the entire platanistoid assemblage of the Chilcatay Formation suggest a high trophic partitioning of this peculiar cetacean paleocommunity. |
format |
Text |
author |
Bianucci, Giovanni de Muizon, Christian Urbina, Mario Lambert, Olivier |
author_facet |
Bianucci, Giovanni de Muizon, Christian Urbina, Mario Lambert, Olivier |
author_sort |
Bianucci, Giovanni |
title |
Extensive Diversity and Disparity of the Early Miocene Platanistoids (Cetacea, Odontoceti) in the Southeastern Pacific (Chilcatay Formation, Peru) |
title_short |
Extensive Diversity and Disparity of the Early Miocene Platanistoids (Cetacea, Odontoceti) in the Southeastern Pacific (Chilcatay Formation, Peru) |
title_full |
Extensive Diversity and Disparity of the Early Miocene Platanistoids (Cetacea, Odontoceti) in the Southeastern Pacific (Chilcatay Formation, Peru) |
title_fullStr |
Extensive Diversity and Disparity of the Early Miocene Platanistoids (Cetacea, Odontoceti) in the Southeastern Pacific (Chilcatay Formation, Peru) |
title_full_unstemmed |
Extensive Diversity and Disparity of the Early Miocene Platanistoids (Cetacea, Odontoceti) in the Southeastern Pacific (Chilcatay Formation, Peru) |
title_sort |
extensive diversity and disparity of the early miocene platanistoids (cetacea, odontoceti) in the southeastern pacific (chilcatay formation, peru) |
publisher |
MDPI |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7151620/ http://www.ncbi.nlm.nih.gov/pubmed/32197480 https://doi.org/10.3390/life10030027 |
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Pacific |
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Pacific |
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baleen whales toothed whale |
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baleen whales toothed whale |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7151620/ http://www.ncbi.nlm.nih.gov/pubmed/32197480 http://dx.doi.org/10.3390/life10030027 |
op_rights |
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
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CC-BY |
op_doi |
https://doi.org/10.3390/life10030027 |
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