Koristocetus pescei gen. et sp. nov., a diminutive sperm whale (Cetacea: Odontoceti: Kogiidae) from the late Miocene of Peru
International audience Among odontocetes, members of the family Kogi-idae (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 sk...
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ftsorbonneuniv:oai:HAL:hal-02612072v1 2024-06-23T07:56:13+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 Dipartimento di Scienze della Terra Pisa University of Pisa - Università di Pisa Institut Royal des Sciences Naturelles de Belgique = Royal Belgian Institute of Natural Sciences (IRSNB / RBINS) Centre de Recherche en Paléontologie - Paris (CR2P) Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Museo de Historia Natural de Lima (MHN) Universidad Nacional Mayor de San Marcos (UNMSM) 2017 https://hal.science/hal-02612072 https://hal.science/hal-02612072/document https://hal.science/hal-02612072/file/186-2017%20Collareta%20et%20al.pdf https://doi.org/10.5194/fr-20-259-2017 en eng HAL CCSD Copernicus Publications info:eu-repo/semantics/altIdentifier/doi/10.5194/fr-20-259-2017 hal-02612072 https://hal.science/hal-02612072 https://hal.science/hal-02612072/document https://hal.science/hal-02612072/file/186-2017%20Collareta%20et%20al.pdf doi:10.5194/fr-20-259-2017 info:eu-repo/semantics/OpenAccess ISSN: 2193-0066 EISSN: 2193-0074 Fossil Record https://hal.science/hal-02612072 Fossil Record, 2017, 20 (2), pp.259-278. ⟨10.5194/fr-20-259-2017⟩ [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology info:eu-repo/semantics/article Journal articles 2017 ftsorbonneuniv https://doi.org/10.5194/fr-20-259-2017 2024-06-06T23:48:35Z International audience Among odontocetes, members of the family Kogi-idae (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 Scaphoko-gia, 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 Kogi-idae: 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 phyloge-netic analysis recognizes Koristocetus as the earliest branching member of the subfamily Kogiinae. Interestingly, Koris-tocetus 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 HAL Sorbonne Université Pisco ENVELOPE(-62.450,-62.450,-62.950,-62.950) Fossa ENVELOPE(9.795,9.795,62.990,62.990) Koris ENVELOPE(18.569,18.569,69.352,69.352) Fossil Record 20 2 259 278 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
spellingShingle |
[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology 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 |
[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
description |
International audience Among odontocetes, members of the family Kogi-idae (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 Scaphoko-gia, 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 Kogi-idae: 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 phyloge-netic analysis recognizes Koristocetus as the earliest branching member of the subfamily Kogiinae. Interestingly, Koris-tocetus 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 |
Dipartimento di Scienze della Terra Pisa University of Pisa - Università di Pisa Institut Royal des Sciences Naturelles de Belgique = Royal Belgian Institute of Natural Sciences (IRSNB / RBINS) Centre de Recherche en Paléontologie - Paris (CR2P) Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Museo de Historia Natural de Lima (MHN) Universidad Nacional Mayor de San Marcos (UNMSM) |
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 |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.science/hal-02612072 https://hal.science/hal-02612072/document https://hal.science/hal-02612072/file/186-2017%20Collareta%20et%20al.pdf https://doi.org/10.5194/fr-20-259-2017 |
long_lat |
ENVELOPE(-62.450,-62.450,-62.950,-62.950) ENVELOPE(9.795,9.795,62.990,62.990) ENVELOPE(18.569,18.569,69.352,69.352) |
geographic |
Pisco Fossa Koris |
geographic_facet |
Pisco Fossa Koris |
genre |
Physeter macrocephalus Sperm whale |
genre_facet |
Physeter macrocephalus Sperm whale |
op_source |
ISSN: 2193-0066 EISSN: 2193-0074 Fossil Record https://hal.science/hal-02612072 Fossil Record, 2017, 20 (2), pp.259-278. ⟨10.5194/fr-20-259-2017⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/fr-20-259-2017 hal-02612072 https://hal.science/hal-02612072 https://hal.science/hal-02612072/document https://hal.science/hal-02612072/file/186-2017%20Collareta%20et%20al.pdf doi:10.5194/fr-20-259-2017 |
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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1802649170263146496 |