Eocene basilosaurid whales from the la Meseta formation, Marambio (Seymour) Island, Antarctica
Basal fully aquatic whales, the basilosaurids are worldwide known from Bartonian-Priabonian localities, indicating that this group was widely distributed during the late middle Eocene. In the Northern Hemisphere, fossils of basilosaurids are abundant, while records in the Southern Hemisphere are sca...
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ftunibueairesbd:paper:paper_00027014_v53_n3_p296_Buono 2023-05-15T13:51:25+02:00 Eocene basilosaurid whales from the la Meseta formation, Marambio (Seymour) Island, Antarctica 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v53_n3_p296_Buono https://hdl.handle.net/20.500.12110/paper_00027014_v53_n3_p296_Buono unknown https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v53_n3_p296_Buono http://hdl.handle.net/20.500.12110/paper_00027014_v53_n3_p296_Buono Basilosauridae Cetacea Cheek teeth Mandibles Paleogene bone dispersal Eocene fossil record paleobiogeography paleoenvironment Southern Hemisphere tooth whale Antarctic Peninsula Antarctica West Antarctica Bartonia 2016 ftunibueairesbd https://doi.org/20.500.12110/paper_00027014_v53_n3_p296_Buono 2023-02-16T02:11:58Z Basal fully aquatic whales, the basilosaurids are worldwide known from Bartonian-Priabonian localities, indicating that this group was widely distributed during the late middle Eocene. In the Northern Hemisphere, fossils of basilosaurids are abundant, while records in the Southern Hemisphere are scarce and, in some cases (i.e., Antarctica), doubtful. The presence of basilosaurids in Antarctica was, until now, uncertain because most of the records are based on fragmentary materials that preclude an accurate assignment to known archaeocete taxa. Here we report the findings of mandibles, teeth, and innominate bone remains of basilosaurids recovered from the La Meseta Formation (TELM 4 Lutetian-Bartonian and; TELM 7 Priabonian), in Marambio (Seymour) Island (James Ross Basin, Antarctic Peninsula). These findings confirm the presence of Basilosauridae in the marine realm of Antarctica, increasing our knowledge of the paleobiogeographic distribution of basilosaurids during the middle-late Eocene. In addition, one of these records is among the oldest occurrences of basilosaurids worldwide, indicating a rapid radiation and dispersal of this group since at least the early middle Eocene. Other/Unknown Material Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island West Antarctica Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) Antarctic Antarctic Peninsula Marambio ENVELOPE(-56.750,-56.750,-64.283,-64.283) Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) West Antarctica |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
unknown |
topic |
Basilosauridae Cetacea Cheek teeth Mandibles Paleogene bone dispersal Eocene fossil record paleobiogeography paleoenvironment Southern Hemisphere tooth whale Antarctic Peninsula Antarctica West Antarctica Bartonia |
spellingShingle |
Basilosauridae Cetacea Cheek teeth Mandibles Paleogene bone dispersal Eocene fossil record paleobiogeography paleoenvironment Southern Hemisphere tooth whale Antarctic Peninsula Antarctica West Antarctica Bartonia Eocene basilosaurid whales from the la Meseta formation, Marambio (Seymour) Island, Antarctica |
topic_facet |
Basilosauridae Cetacea Cheek teeth Mandibles Paleogene bone dispersal Eocene fossil record paleobiogeography paleoenvironment Southern Hemisphere tooth whale Antarctic Peninsula Antarctica West Antarctica Bartonia |
description |
Basal fully aquatic whales, the basilosaurids are worldwide known from Bartonian-Priabonian localities, indicating that this group was widely distributed during the late middle Eocene. In the Northern Hemisphere, fossils of basilosaurids are abundant, while records in the Southern Hemisphere are scarce and, in some cases (i.e., Antarctica), doubtful. The presence of basilosaurids in Antarctica was, until now, uncertain because most of the records are based on fragmentary materials that preclude an accurate assignment to known archaeocete taxa. Here we report the findings of mandibles, teeth, and innominate bone remains of basilosaurids recovered from the La Meseta Formation (TELM 4 Lutetian-Bartonian and; TELM 7 Priabonian), in Marambio (Seymour) Island (James Ross Basin, Antarctic Peninsula). These findings confirm the presence of Basilosauridae in the marine realm of Antarctica, increasing our knowledge of the paleobiogeographic distribution of basilosaurids during the middle-late Eocene. In addition, one of these records is among the oldest occurrences of basilosaurids worldwide, indicating a rapid radiation and dispersal of this group since at least the early middle Eocene. |
title |
Eocene basilosaurid whales from the la Meseta formation, Marambio (Seymour) Island, Antarctica |
title_short |
Eocene basilosaurid whales from the la Meseta formation, Marambio (Seymour) Island, Antarctica |
title_full |
Eocene basilosaurid whales from the la Meseta formation, Marambio (Seymour) Island, Antarctica |
title_fullStr |
Eocene basilosaurid whales from the la Meseta formation, Marambio (Seymour) Island, Antarctica |
title_full_unstemmed |
Eocene basilosaurid whales from the la Meseta formation, Marambio (Seymour) Island, Antarctica |
title_sort |
eocene basilosaurid whales from the la meseta formation, marambio (seymour) island, antarctica |
publishDate |
2016 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v53_n3_p296_Buono https://hdl.handle.net/20.500.12110/paper_00027014_v53_n3_p296_Buono |
long_lat |
ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
geographic |
Antarctic Antarctic Peninsula Marambio Seymour Seymour Island West Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula Marambio Seymour Seymour Island West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island West Antarctica |
op_relation |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v53_n3_p296_Buono http://hdl.handle.net/20.500.12110/paper_00027014_v53_n3_p296_Buono |
op_doi |
https://doi.org/20.500.12110/paper_00027014_v53_n3_p296_Buono |
_version_ |
1766255263327715328 |