EURHINODELPHINIDS FROM THE EARLY MIOCENE OF PERU: FIRST UNAMBIGUOUS RECORDS OF THESE HYPER-LONGIROSTRINE DOLPHINS OUTSIDE THE NORTH ATLANTIC REALM
International audience Among the many hyper-longirostrine dolphins (Odontoceti) from the Miocene, members of the family Eurhinodelphinidae bear two highly distinctive cranial features: a long and edentulous premaxillary portion of the rostrum and a mandible that is significantly shorter than the ros...
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2021
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ftccsdartic:oai:HAL:hal-03256619v1 2023-05-15T17:28:15+02:00 EURHINODELPHINIDS FROM THE EARLY MIOCENE OF PERU: FIRST UNAMBIGUOUS RECORDS OF THESE HYPER-LONGIROSTRINE DOLPHINS OUTSIDE THE NORTH ATLANTIC REALM Lambert, Olivier De Muizon, Christian Varas-Malca, Rafael, Urbina, Mario Bianucci, Giovanni Chimie et Biologie des Membranes et des Nanoobjets (CBMN) École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB)-Institut de Chimie du CNRS (INC)-Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS) Centre National de la Recherche Scientifique (CNRS) Museo de Historia Natural de Lima (MHN) Universidad Nacional Mayor de San Marcos (UNMSM) Dipartimento di Scienze della Terra Pisa University of Pisa - Università di Pisa 2021-03 https://hal.sorbonne-universite.fr/hal-03256619 https://hal.sorbonne-universite.fr/hal-03256619/document https://hal.sorbonne-universite.fr/hal-03256619/file/15124-Article%20Text-44928-1-10-20210126%281%29.pdf en eng HAL CCSD Universita degli Studi di Milano hal-03256619 https://hal.sorbonne-universite.fr/hal-03256619 https://hal.sorbonne-universite.fr/hal-03256619/document https://hal.sorbonne-universite.fr/hal-03256619/file/15124-Article%20Text-44928-1-10-20210126%281%29.pdf info:eu-repo/semantics/OpenAccess ISSN: 0035-6883 EISSN: 2039-4942 Rivista Italiana di Paleontologia e Stratigrafia https://hal.sorbonne-universite.fr/hal-03256619 Rivista Italiana di Paleontologia e Stratigrafia, Universita degli Studi di Milano, 2021, 127 (1), pp.17-32 Cetacea Odontoceti Eurhinodelphinidae Chilcatay Formation Burdigalian southeastern Pacific [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology info:eu-repo/semantics/article Journal articles 2021 ftccsdartic 2022-01-09T00:20:41Z International audience Among the many hyper-longirostrine dolphins (Odontoceti) from the Miocene, members of the family Eurhinodelphinidae bear two highly distinctive cranial features: a long and edentulous premaxillary portion of the rostrum and a mandible that is significantly shorter than the rostrum. Until now, unambiguously attributed members of this clade were only recorded from early to middle Miocene deposits of the North Atlantic realm (east coast U.S.A., North Sea Basin, and Mediterranean). In this work we describe and compare two partial skulls of longi-rostrine dolphins from late early Miocene (Burdigalian, 19.25-18 Ma) marine deposits of the Chilcatay Formation, in the East Pisco Basin (southern coast of Peru), preserving rostral and mandibular material, as well as ear bones. Based on these specimens we report diagnostic remains attributable to this family for the first time for the whole Southern Hemisphere and the whole Pacific Ocean. This major expansion of eurhinodelphinids’ palaeogeographic distribution contrasts with their proposed shallow-water, coastal environments; it suggests a new dispersal route for members of the family across the Central American Seaway; and it further highlights the similarities between the odontocete faunas of the southeastern Pacific and North Atlantic realm during the Miocene. Better-preserved eurhinodelphinid speci-mens from the odontocete-rich Chilcatay Formation will allow for a more detailed comparison with North Atlantic members of the family Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Pacific Pisco ENVELOPE(-62.450,-62.450,-62.950,-62.950) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Cetacea Odontoceti Eurhinodelphinidae Chilcatay Formation Burdigalian southeastern Pacific [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
spellingShingle |
Cetacea Odontoceti Eurhinodelphinidae Chilcatay Formation Burdigalian southeastern Pacific [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology Lambert, Olivier De Muizon, Christian Varas-Malca, Rafael, Urbina, Mario Bianucci, Giovanni EURHINODELPHINIDS FROM THE EARLY MIOCENE OF PERU: FIRST UNAMBIGUOUS RECORDS OF THESE HYPER-LONGIROSTRINE DOLPHINS OUTSIDE THE NORTH ATLANTIC REALM |
topic_facet |
Cetacea Odontoceti Eurhinodelphinidae Chilcatay Formation Burdigalian southeastern Pacific [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
description |
International audience Among the many hyper-longirostrine dolphins (Odontoceti) from the Miocene, members of the family Eurhinodelphinidae bear two highly distinctive cranial features: a long and edentulous premaxillary portion of the rostrum and a mandible that is significantly shorter than the rostrum. Until now, unambiguously attributed members of this clade were only recorded from early to middle Miocene deposits of the North Atlantic realm (east coast U.S.A., North Sea Basin, and Mediterranean). In this work we describe and compare two partial skulls of longi-rostrine dolphins from late early Miocene (Burdigalian, 19.25-18 Ma) marine deposits of the Chilcatay Formation, in the East Pisco Basin (southern coast of Peru), preserving rostral and mandibular material, as well as ear bones. Based on these specimens we report diagnostic remains attributable to this family for the first time for the whole Southern Hemisphere and the whole Pacific Ocean. This major expansion of eurhinodelphinids’ palaeogeographic distribution contrasts with their proposed shallow-water, coastal environments; it suggests a new dispersal route for members of the family across the Central American Seaway; and it further highlights the similarities between the odontocete faunas of the southeastern Pacific and North Atlantic realm during the Miocene. Better-preserved eurhinodelphinid speci-mens from the odontocete-rich Chilcatay Formation will allow for a more detailed comparison with North Atlantic members of the family |
author2 |
Chimie et Biologie des Membranes et des Nanoobjets (CBMN) École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB)-Institut de Chimie du CNRS (INC)-Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS) Centre National de la Recherche Scientifique (CNRS) Museo de Historia Natural de Lima (MHN) Universidad Nacional Mayor de San Marcos (UNMSM) Dipartimento di Scienze della Terra Pisa University of Pisa - Università di Pisa |
format |
Article in Journal/Newspaper |
author |
Lambert, Olivier De Muizon, Christian Varas-Malca, Rafael, Urbina, Mario Bianucci, Giovanni |
author_facet |
Lambert, Olivier De Muizon, Christian Varas-Malca, Rafael, Urbina, Mario Bianucci, Giovanni |
author_sort |
Lambert, Olivier |
title |
EURHINODELPHINIDS FROM THE EARLY MIOCENE OF PERU: FIRST UNAMBIGUOUS RECORDS OF THESE HYPER-LONGIROSTRINE DOLPHINS OUTSIDE THE NORTH ATLANTIC REALM |
title_short |
EURHINODELPHINIDS FROM THE EARLY MIOCENE OF PERU: FIRST UNAMBIGUOUS RECORDS OF THESE HYPER-LONGIROSTRINE DOLPHINS OUTSIDE THE NORTH ATLANTIC REALM |
title_full |
EURHINODELPHINIDS FROM THE EARLY MIOCENE OF PERU: FIRST UNAMBIGUOUS RECORDS OF THESE HYPER-LONGIROSTRINE DOLPHINS OUTSIDE THE NORTH ATLANTIC REALM |
title_fullStr |
EURHINODELPHINIDS FROM THE EARLY MIOCENE OF PERU: FIRST UNAMBIGUOUS RECORDS OF THESE HYPER-LONGIROSTRINE DOLPHINS OUTSIDE THE NORTH ATLANTIC REALM |
title_full_unstemmed |
EURHINODELPHINIDS FROM THE EARLY MIOCENE OF PERU: FIRST UNAMBIGUOUS RECORDS OF THESE HYPER-LONGIROSTRINE DOLPHINS OUTSIDE THE NORTH ATLANTIC REALM |
title_sort |
eurhinodelphinids from the early miocene of peru: first unambiguous records of these hyper-longirostrine dolphins outside the north atlantic realm |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.sorbonne-universite.fr/hal-03256619 https://hal.sorbonne-universite.fr/hal-03256619/document https://hal.sorbonne-universite.fr/hal-03256619/file/15124-Article%20Text-44928-1-10-20210126%281%29.pdf |
long_lat |
ENVELOPE(-62.450,-62.450,-62.950,-62.950) |
geographic |
Pacific Pisco |
geographic_facet |
Pacific Pisco |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0035-6883 EISSN: 2039-4942 Rivista Italiana di Paleontologia e Stratigrafia https://hal.sorbonne-universite.fr/hal-03256619 Rivista Italiana di Paleontologia e Stratigrafia, Universita degli Studi di Milano, 2021, 127 (1), pp.17-32 |
op_relation |
hal-03256619 https://hal.sorbonne-universite.fr/hal-03256619 https://hal.sorbonne-universite.fr/hal-03256619/document https://hal.sorbonne-universite.fr/hal-03256619/file/15124-Article%20Text-44928-1-10-20210126%281%29.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766120802668773376 |