Description of the marine mammal fauna of the upper Monterey Formation from Oldest record of monk seals from the North Pacific and biogeographic implications

True seals (crown Phocidae) originated during the late Oligocene–early Miocene (approx. 27–20 Ma) in the North Atlantic/Mediterranean region, with later (middle Miocene, approx. 16–11 Ma) dispersal events to the South Atlantic and South Pacific. Contrasting with other pinnipeds, the fossil record of...

Full description

Bibliographic Details
Main Authors: Jorge Velez-Juarbe, Ana M. Valenzuela-Toro
Format: Other Non-Article Part of Journal/Newspaper
Language:unknown
Published: 2019
Subjects:
Online Access:https://doi.org/10.6084/m9.figshare.8025191.v1
https://figshare.com/articles/journal_contribution/Description_of_the_marine_mammal_fauna_of_the_upper_Monterey_Formation_from_Oldest_record_of_monk_seals_from_the_North_Pacific_and_biogeographic_implications/8025191
id ftroysocietyfig:oai:figshare.com:article/8025191
record_format openpolar
spelling ftroysocietyfig:oai:figshare.com:article/8025191 2023-05-15T17:34:12+02:00 Description of the marine mammal fauna of the upper Monterey Formation from Oldest record of monk seals from the North Pacific and biogeographic implications Jorge Velez-Juarbe Ana M. Valenzuela-Toro 2019-04-23T08:41:45Z https://doi.org/10.6084/m9.figshare.8025191.v1 https://figshare.com/articles/journal_contribution/Description_of_the_marine_mammal_fauna_of_the_upper_Monterey_Formation_from_Oldest_record_of_monk_seals_from_the_North_Pacific_and_biogeographic_implications/8025191 unknown doi:10.6084/m9.figshare.8025191.v1 https://figshare.com/articles/journal_contribution/Description_of_the_marine_mammal_fauna_of_the_upper_Monterey_Formation_from_Oldest_record_of_monk_seals_from_the_North_Pacific_and_biogeographic_implications/8025191 CC BY 4.0 CC-BY Evolutionary Biology Palaeontology (incl. Palynology) Animal Systematics and Taxonomy Plant Systematics and Taxonomy Miocene Monachinae North Pacific California palaeobiogeography marine mammals Text Journal contribution 2019 ftroysocietyfig https://doi.org/10.6084/m9.figshare.8025191.v1 2022-01-01T19:40:35Z True seals (crown Phocidae) originated during the late Oligocene–early Miocene (approx. 27–20 Ma) in the North Atlantic/Mediterranean region, with later (middle Miocene, approx. 16–11 Ma) dispersal events to the South Atlantic and South Pacific. Contrasting with other pinnipeds, the fossil record of phocids from the North Pacific region is scarce and restricted to the Pleistocene. Here we present the oldest fossil record of crown phocids, monachines (monk seals), from the North Pacific region. The specimens were collected from the upper Monterey Formation in Southern California and are dated to 8.5–7.1 Ma, predating the previously oldest known record by at least 7 Ma. This record provides new insights into the early biogeographic history of phocids in the North Pacific and is consistent with a northward dispersal of monk seals (monachines), which has been recognized for other groups of marine mammals. Alternatively, this finding may correspond with a westward dispersal through the Central American Seaway of some ancestor of the Hawaiian monk seal. This record increases the taxonomic richness of the Monterey pinniped assemblage to five taxa, making it a fairly diverse fossil assemblage, but also constitutes the oldest record of sympatry among all three extant pinniped crown clades. Other Non-Article Part of Journal/Newspaper North Atlantic The Royal Society: Figshare Pacific
institution Open Polar
collection The Royal Society: Figshare
op_collection_id ftroysocietyfig
language unknown
topic Evolutionary Biology
Palaeontology (incl. Palynology)
Animal Systematics and Taxonomy
Plant Systematics and Taxonomy
Miocene
Monachinae
North Pacific
California
palaeobiogeography
marine mammals
spellingShingle Evolutionary Biology
Palaeontology (incl. Palynology)
Animal Systematics and Taxonomy
Plant Systematics and Taxonomy
Miocene
Monachinae
North Pacific
California
palaeobiogeography
marine mammals
Jorge Velez-Juarbe
Ana M. Valenzuela-Toro
Description of the marine mammal fauna of the upper Monterey Formation from Oldest record of monk seals from the North Pacific and biogeographic implications
topic_facet Evolutionary Biology
Palaeontology (incl. Palynology)
Animal Systematics and Taxonomy
Plant Systematics and Taxonomy
Miocene
Monachinae
North Pacific
California
palaeobiogeography
marine mammals
description True seals (crown Phocidae) originated during the late Oligocene–early Miocene (approx. 27–20 Ma) in the North Atlantic/Mediterranean region, with later (middle Miocene, approx. 16–11 Ma) dispersal events to the South Atlantic and South Pacific. Contrasting with other pinnipeds, the fossil record of phocids from the North Pacific region is scarce and restricted to the Pleistocene. Here we present the oldest fossil record of crown phocids, monachines (monk seals), from the North Pacific region. The specimens were collected from the upper Monterey Formation in Southern California and are dated to 8.5–7.1 Ma, predating the previously oldest known record by at least 7 Ma. This record provides new insights into the early biogeographic history of phocids in the North Pacific and is consistent with a northward dispersal of monk seals (monachines), which has been recognized for other groups of marine mammals. Alternatively, this finding may correspond with a westward dispersal through the Central American Seaway of some ancestor of the Hawaiian monk seal. This record increases the taxonomic richness of the Monterey pinniped assemblage to five taxa, making it a fairly diverse fossil assemblage, but also constitutes the oldest record of sympatry among all three extant pinniped crown clades.
format Other Non-Article Part of Journal/Newspaper
author Jorge Velez-Juarbe
Ana M. Valenzuela-Toro
author_facet Jorge Velez-Juarbe
Ana M. Valenzuela-Toro
author_sort Jorge Velez-Juarbe
title Description of the marine mammal fauna of the upper Monterey Formation from Oldest record of monk seals from the North Pacific and biogeographic implications
title_short Description of the marine mammal fauna of the upper Monterey Formation from Oldest record of monk seals from the North Pacific and biogeographic implications
title_full Description of the marine mammal fauna of the upper Monterey Formation from Oldest record of monk seals from the North Pacific and biogeographic implications
title_fullStr Description of the marine mammal fauna of the upper Monterey Formation from Oldest record of monk seals from the North Pacific and biogeographic implications
title_full_unstemmed Description of the marine mammal fauna of the upper Monterey Formation from Oldest record of monk seals from the North Pacific and biogeographic implications
title_sort description of the marine mammal fauna of the upper monterey formation from oldest record of monk seals from the north pacific and biogeographic implications
publishDate 2019
url https://doi.org/10.6084/m9.figshare.8025191.v1
https://figshare.com/articles/journal_contribution/Description_of_the_marine_mammal_fauna_of_the_upper_Monterey_Formation_from_Oldest_record_of_monk_seals_from_the_North_Pacific_and_biogeographic_implications/8025191
geographic Pacific
geographic_facet Pacific
genre North Atlantic
genre_facet North Atlantic
op_relation doi:10.6084/m9.figshare.8025191.v1
https://figshare.com/articles/journal_contribution/Description_of_the_marine_mammal_fauna_of_the_upper_Monterey_Formation_from_Oldest_record_of_monk_seals_from_the_North_Pacific_and_biogeographic_implications/8025191
op_rights CC BY 4.0
op_rightsnorm CC-BY
op_doi https://doi.org/10.6084/m9.figshare.8025191.v1
_version_ 1766132955554512896