A new Miocene baleen whale from the Peruvian desert
The Pisco-Ica and Sacaco basins of southern Peru are renowned for their abundance of exceptionally preserved fossil cetaceans, several of which retain traces of soft tissue and occasionally even stomach contents. Previous work has mostly focused on odontocetes, with baleen whales currently being res...
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crroyalsociety:10.1098/rsos.160542 2024-06-02T08:04:01+00:00 A new Miocene baleen whale from the Peruvian desert Marx, Felix G. Kohno, Naoki Japan Society for the Promotion of Science European Commission 2016 http://dx.doi.org/10.1098/rsos.160542 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.160542 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.160542 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Royal Society Open Science volume 3, issue 10, page 160542 ISSN 2054-5703 journal-article 2016 crroyalsociety https://doi.org/10.1098/rsos.160542 2024-05-07T14:16:49Z The Pisco-Ica and Sacaco basins of southern Peru are renowned for their abundance of exceptionally preserved fossil cetaceans, several of which retain traces of soft tissue and occasionally even stomach contents. Previous work has mostly focused on odontocetes, with baleen whales currently being restricted to just three described taxa. Here, we report a new Late Miocene rorqual (family Balaenopteridae), Incakujira anillodefuego gen. et sp. nov., based on two exceptionally preserved specimens from the Pisco Formation exposed at Aguada de Lomas, Sacaco Basin, southern Peru. Incakujira overall closely resembles modern balaenopterids, but stands out for its unusually gracile ascending process of the maxilla, as well as a markedly twisted postglenoid process of the squamosal. The latter likely impeded lateral (omega) rotation of the mandible, in stark contrast with the highly flexible craniomandibular joint of extant lunge-feeding rorquals. Overall, Incakujira expands the still meagre Miocene record of balaenopterids and reveals a previously underappreciated degree of complexity in the evolution of their iconic lunge-feeding strategy. Article in Journal/Newspaper baleen whale baleen whales The Royal Society Pisco ENVELOPE(-62.450,-62.450,-62.950,-62.950) Rorqual ENVELOPE(-62.311,-62.311,-65.648,-65.648) Royal Society Open Science 3 10 160542 |
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Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
The Pisco-Ica and Sacaco basins of southern Peru are renowned for their abundance of exceptionally preserved fossil cetaceans, several of which retain traces of soft tissue and occasionally even stomach contents. Previous work has mostly focused on odontocetes, with baleen whales currently being restricted to just three described taxa. Here, we report a new Late Miocene rorqual (family Balaenopteridae), Incakujira anillodefuego gen. et sp. nov., based on two exceptionally preserved specimens from the Pisco Formation exposed at Aguada de Lomas, Sacaco Basin, southern Peru. Incakujira overall closely resembles modern balaenopterids, but stands out for its unusually gracile ascending process of the maxilla, as well as a markedly twisted postglenoid process of the squamosal. The latter likely impeded lateral (omega) rotation of the mandible, in stark contrast with the highly flexible craniomandibular joint of extant lunge-feeding rorquals. Overall, Incakujira expands the still meagre Miocene record of balaenopterids and reveals a previously underappreciated degree of complexity in the evolution of their iconic lunge-feeding strategy. |
author2 |
Japan Society for the Promotion of Science European Commission |
format |
Article in Journal/Newspaper |
author |
Marx, Felix G. Kohno, Naoki |
spellingShingle |
Marx, Felix G. Kohno, Naoki A new Miocene baleen whale from the Peruvian desert |
author_facet |
Marx, Felix G. Kohno, Naoki |
author_sort |
Marx, Felix G. |
title |
A new Miocene baleen whale from the Peruvian desert |
title_short |
A new Miocene baleen whale from the Peruvian desert |
title_full |
A new Miocene baleen whale from the Peruvian desert |
title_fullStr |
A new Miocene baleen whale from the Peruvian desert |
title_full_unstemmed |
A new Miocene baleen whale from the Peruvian desert |
title_sort |
new miocene baleen whale from the peruvian desert |
publisher |
The Royal Society |
publishDate |
2016 |
url |
http://dx.doi.org/10.1098/rsos.160542 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.160542 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.160542 |
long_lat |
ENVELOPE(-62.450,-62.450,-62.950,-62.950) ENVELOPE(-62.311,-62.311,-65.648,-65.648) |
geographic |
Pisco Rorqual |
geographic_facet |
Pisco Rorqual |
genre |
baleen whale baleen whales |
genre_facet |
baleen whale baleen whales |
op_source |
Royal Society Open Science volume 3, issue 10, page 160542 ISSN 2054-5703 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsos.160542 |
container_title |
Royal Society Open Science |
container_volume |
3 |
container_issue |
10 |
container_start_page |
160542 |
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1800748635146682368 |