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Abstract:

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.

Registro:

Documento: Artículo
Título:Eocene basilosaurid whales from the la Meseta formation, Marambio (Seymour) Island, Antarctica
Autor:Buono, M.R.; Fernández, M.S.; Reguero, M.A.; Marenssi, S.A.; Santillana, S.N.; Mörs, T.
Filiación:Instituto Patagónico de Geología y Paleontología, Centro Nacional Patagónico, CONICET, Boulevard Brown 2915, Puerto Madryn, Chubut, U9120ACG, Argentina
División Paleontología Vertebrados, Unidades de investigación Anexo Museo, Facultad de Ciencias Naturales y Museo, Calle 60 y 122, La Plata, Buenos Aires, B1900AVW, Argentina
División Paleontología de Vertebrados, Museo de La Plata, Paseo del Bosque s/n, La Plata, B1900FWA, Argentina
Facultad de Ciencias Naturales y Museo, UNLP, Argentina
Instituto Antártico Argentino, 25 de Mayo 1143, San-Martín, Buenos Aires, B1650HMK, Argentina
Departamento de Ciencias Geológicas, Facultad de Ciencias Naturales, Universidad de Buenos Aires, CONICET, Intendente Güiraldes 2160, Ciudad de Buenos Aires, Buenos Aires, C1428EGA, Argentina
Department of Palaeobiology, Swedish Museum of Natural History, P.O. Box 50007, Stockholm, SE-104 05, Sweden
Palabras clave: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
Año:2016
Volumen:53
Número:3
Página de inicio:296
Página de fin:315
DOI: http://dx.doi.org/10.5710/AMGH.02.02.2016.2922
Título revista:Ameghiniana
Título revista abreviado:Ameghiniana
ISSN:00027014
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v53_n3_p296_Buono

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Citas:

---------- APA ----------
Buono, M.R., Fernández, M.S., Reguero, M.A., Marenssi, S.A., Santillana, S.N. & Mörs, T. (2016) . Eocene basilosaurid whales from the la Meseta formation, Marambio (Seymour) Island, Antarctica. Ameghiniana, 53(3), 296-315.
http://dx.doi.org/10.5710/AMGH.02.02.2016.2922
---------- CHICAGO ----------
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" . Ameghiniana 53, no. 3 (2016) : 296-315.
http://dx.doi.org/10.5710/AMGH.02.02.2016.2922
---------- MLA ----------
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" . Ameghiniana, vol. 53, no. 3, 2016, pp. 296-315.
http://dx.doi.org/10.5710/AMGH.02.02.2016.2922
---------- VANCOUVER ----------
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. Ameghiniana. 2016;53(3):296-315.
http://dx.doi.org/10.5710/AMGH.02.02.2016.2922