Koristocetus pescei gen. et sp. nov., a diminutive sperm whale (Cetacea: Odontoceti: Kogiidae) from the late Miocene of Peru
Among odontocetes, members of the family Kogiidae (pygmy and dwarf sperm whales) are known as small-sized and in many respects enigmatic relatives of the great sperm whale Physeter macrocephalus. Most of the still scanty fossil record of Kogiidae is represented by isolated skulls and ear bones from...
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ftunivpisairis:oai:arpi.unipi.it:11568/891486 2024-02-27T08:44:35+00:00 Koristocetus pescei gen. et sp. nov., a diminutive sperm whale (Cetacea: Odontoceti: Kogiidae) from the late Miocene of Peru Collareta, Alberto Lambert, Olivier De Muizon, Christian Urbina, Mario Bianucci, Giovanni Collareta, Alberto Lambert, Olivier De Muizon, Christian Urbina, Mario Bianucci, Giovanni 2017 ELETTRONICO http://hdl.handle.net/11568/891486 https://doi.org/10.5194/fr-20-259-2017 http://www.foss-rec.net/recent_papers.html eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000417286000001 volume:20 issue:2 firstpage:259 lastpage:278 numberofpages:20 journal:FOSSIL RECORD http://hdl.handle.net/11568/891486 doi:10.5194/fr-20-259-2017 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85038406463 http://www.foss-rec.net/recent_papers.html info:eu-repo/semantics/openAccess Paleontology Cetacea Kogiidae Miocene Peru info:eu-repo/semantics/article 2017 ftunivpisairis https://doi.org/10.5194/fr-20-259-2017 2024-01-31T17:49:29Z Among odontocetes, members of the family Kogiidae (pygmy and dwarf sperm whales) are known as small-sized and in many respects enigmatic relatives of the great sperm whale Physeter macrocephalus. Most of the still scanty fossil record of Kogiidae is represented by isolated skulls and ear bones from Neogene deposits of the Northern Hemisphere, with the significant exception of Scaphokogia, a highly autapomorphic genus from late Miocene deposits of the Pisco Formation exposed along the southern coast of Peru. Here we report on a new fossil kogiid from Aguada de Lomas, a site where the late Miocene beds of the Pisco Formation are exposed. This specimen consists of an almost complete cranium representing a new taxon of Kogiidae: Koristocetus pescei gen. et sp. nov. Koristocetus mainly differs from extant Kogia spp. by displaying a larger temporal fossa and well-individualized dental alveoli on the upper jaws. Coupled with a relatively elongated rostrum, these characters suggest that Koristocetus retained some degree of raptorial feeding abilities, contrasting with the strong suction feeding specialization seen in Recent kogiids. Our phylogenetic analysis recognizes Koristocetus as the earliest branching member of the subfamily Kogiinae. Interestingly, Koristocetus shared the southern coast of present-day Peru with members of the genus Scaphokogia, whose unique convex rostrum and unusual neurocranial morphology seemingly indicate a peculiar foraging specialization that has still to be understood. In conclusion, Koristocetus evokes a long history of high diversity, morphological disparity, and sympatric habits in fossil kogiids, thus suggesting that our comprehension of the evolutionary history of pygmy and dwarf sperm whales is still far from being exhaustive. Article in Journal/Newspaper Physeter macrocephalus Sperm whale ARPI - Archivio della Ricerca dell'Università di Pisa Fossa ENVELOPE(9.795,9.795,62.990,62.990) Pisco ENVELOPE(-62.450,-62.450,-62.950,-62.950) Fossil Record 20 2 259 278 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
Paleontology Cetacea Kogiidae Miocene Peru |
spellingShingle |
Paleontology Cetacea Kogiidae Miocene Peru Collareta, Alberto Lambert, Olivier De Muizon, Christian Urbina, Mario Bianucci, Giovanni Koristocetus pescei gen. et sp. nov., a diminutive sperm whale (Cetacea: Odontoceti: Kogiidae) from the late Miocene of Peru |
topic_facet |
Paleontology Cetacea Kogiidae Miocene Peru |
description |
Among odontocetes, members of the family Kogiidae (pygmy and dwarf sperm whales) are known as small-sized and in many respects enigmatic relatives of the great sperm whale Physeter macrocephalus. Most of the still scanty fossil record of Kogiidae is represented by isolated skulls and ear bones from Neogene deposits of the Northern Hemisphere, with the significant exception of Scaphokogia, a highly autapomorphic genus from late Miocene deposits of the Pisco Formation exposed along the southern coast of Peru. Here we report on a new fossil kogiid from Aguada de Lomas, a site where the late Miocene beds of the Pisco Formation are exposed. This specimen consists of an almost complete cranium representing a new taxon of Kogiidae: Koristocetus pescei gen. et sp. nov. Koristocetus mainly differs from extant Kogia spp. by displaying a larger temporal fossa and well-individualized dental alveoli on the upper jaws. Coupled with a relatively elongated rostrum, these characters suggest that Koristocetus retained some degree of raptorial feeding abilities, contrasting with the strong suction feeding specialization seen in Recent kogiids. Our phylogenetic analysis recognizes Koristocetus as the earliest branching member of the subfamily Kogiinae. Interestingly, Koristocetus shared the southern coast of present-day Peru with members of the genus Scaphokogia, whose unique convex rostrum and unusual neurocranial morphology seemingly indicate a peculiar foraging specialization that has still to be understood. In conclusion, Koristocetus evokes a long history of high diversity, morphological disparity, and sympatric habits in fossil kogiids, thus suggesting that our comprehension of the evolutionary history of pygmy and dwarf sperm whales is still far from being exhaustive. |
author2 |
Collareta, Alberto Lambert, Olivier De Muizon, Christian Urbina, Mario Bianucci, Giovanni |
format |
Article in Journal/Newspaper |
author |
Collareta, Alberto Lambert, Olivier De Muizon, Christian Urbina, Mario Bianucci, Giovanni |
author_facet |
Collareta, Alberto Lambert, Olivier De Muizon, Christian Urbina, Mario Bianucci, Giovanni |
author_sort |
Collareta, Alberto |
title |
Koristocetus pescei gen. et sp. nov., a diminutive sperm whale (Cetacea: Odontoceti: Kogiidae) from the late Miocene of Peru |
title_short |
Koristocetus pescei gen. et sp. nov., a diminutive sperm whale (Cetacea: Odontoceti: Kogiidae) from the late Miocene of Peru |
title_full |
Koristocetus pescei gen. et sp. nov., a diminutive sperm whale (Cetacea: Odontoceti: Kogiidae) from the late Miocene of Peru |
title_fullStr |
Koristocetus pescei gen. et sp. nov., a diminutive sperm whale (Cetacea: Odontoceti: Kogiidae) from the late Miocene of Peru |
title_full_unstemmed |
Koristocetus pescei gen. et sp. nov., a diminutive sperm whale (Cetacea: Odontoceti: Kogiidae) from the late Miocene of Peru |
title_sort |
koristocetus pescei gen. et sp. nov., a diminutive sperm whale (cetacea: odontoceti: kogiidae) from the late miocene of peru |
publishDate |
2017 |
url |
http://hdl.handle.net/11568/891486 https://doi.org/10.5194/fr-20-259-2017 http://www.foss-rec.net/recent_papers.html |
long_lat |
ENVELOPE(9.795,9.795,62.990,62.990) ENVELOPE(-62.450,-62.450,-62.950,-62.950) |
geographic |
Fossa Pisco |
geographic_facet |
Fossa Pisco |
genre |
Physeter macrocephalus Sperm whale |
genre_facet |
Physeter macrocephalus Sperm whale |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000417286000001 volume:20 issue:2 firstpage:259 lastpage:278 numberofpages:20 journal:FOSSIL RECORD http://hdl.handle.net/11568/891486 doi:10.5194/fr-20-259-2017 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85038406463 http://www.foss-rec.net/recent_papers.html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/fr-20-259-2017 |
container_title |
Fossil Record |
container_volume |
20 |
container_issue |
2 |
container_start_page |
259 |
op_container_end_page |
278 |
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1792053048879611904 |