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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Autores principales:	Buono, M.R., Fernández, M.S., Reguero, M.A., Marenssi, S.A., Santillana, S.N., Mörs, T.
Formato:	JOUR
Materias:	Basilosauridae Cetacea Cheek teeth Mandibles Paleogene bone dispersal Eocene fossil record paleobiogeography paleoenvironment Southern Hemisphere tooth whale Antarctic Peninsula Antarctica West Antarctica Bartonia
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00027014_v53_n3_p296_Buono
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00027014_v53_n3_p296_Buono
record_format	dspace
spelling	todo:paper_00027014_v53_n3_p296_Buono2023-10-03T13:53:20Z Eocene basilosaurid whales from the la Meseta formation, Marambio (Seymour) Island, Antarctica Buono, M.R. Fernández, M.S. Reguero, M.A. Marenssi, S.A. Santillana, S.N. Mörs, T. Basilosauridae Cetacea Cheek teeth Mandibles Paleogene bone dispersal Eocene fossil record paleobiogeography paleoenvironment Paleogene Southern Hemisphere tooth whale Antarctic Peninsula Antarctica West Antarctica Bartonia Basilosauridae Cetacea 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00027014_v53_n3_p296_Buono
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Basilosauridae Cetacea Cheek teeth Mandibles Paleogene bone dispersal Eocene fossil record paleobiogeography paleoenvironment Paleogene Southern Hemisphere tooth whale Antarctic Peninsula Antarctica West Antarctica Bartonia Basilosauridae Cetacea
spellingShingle	Basilosauridae Cetacea Cheek teeth Mandibles Paleogene bone dispersal Eocene fossil record paleobiogeography paleoenvironment Paleogene Southern Hemisphere tooth whale Antarctic Peninsula Antarctica West Antarctica Bartonia Basilosauridae Cetacea Buono, M.R. Fernández, M.S. Reguero, M.A. Marenssi, S.A. Santillana, S.N. Mörs, T. 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 Paleogene Southern Hemisphere tooth whale Antarctic Peninsula Antarctica West Antarctica Bartonia Basilosauridae Cetacea
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.
format	JOUR
author	Buono, M.R. Fernández, M.S. Reguero, M.A. Marenssi, S.A. Santillana, S.N. Mörs, T.
author_facet	Buono, M.R. Fernández, M.S. Reguero, M.A. Marenssi, S.A. Santillana, S.N. Mörs, T.
author_sort	Buono, M.R.
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
url	http://hdl.handle.net/20.500.12110/paper_00027014_v53_n3_p296_Buono
work_keys_str_mv	AT buonomr eocenebasilosauridwhalesfromthelamesetaformationmarambioseymourislandantarctica AT fernandezms eocenebasilosauridwhalesfromthelamesetaformationmarambioseymourislandantarctica AT regueroma eocenebasilosauridwhalesfromthelamesetaformationmarambioseymourislandantarctica AT marenssisa eocenebasilosauridwhalesfromthelamesetaformationmarambioseymourislandantarctica AT santillanasn eocenebasilosauridwhalesfromthelamesetaformationmarambioseymourislandantarctica AT morst eocenebasilosauridwhalesfromthelamesetaformationmarambioseymourislandantarctica
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Eocene basilosaurid whales from the la Meseta formation, Marambio (Seymour) Island, Antarctica

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