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Earliest Mysticete from the Late Eocene of Peru Sheds New Light on the Origin of Baleen Whales.
Lambert, Olivier; Martínez-Cáceres, Manuel; Bianucci, Giovanni; Di Celma, Claudio; Salas-Gismondi, Rodolfo; Steurbaut, Etienne; Urbina, Mario; de Muizon, Christian.
Afiliação
  • Lambert O; D.O. Terre et Histoire de la Vie, Institut Royal des Sciences Naturelles de Belgique, Rue Vautier 29, 1000 Brussels, Belgium. Electronic address: olivier.lambert@naturalsciences.be.
  • Martínez-Cáceres M; Centre de Recherche sur la Paléobiodiversité et les Paléoenvironnements-CR2P (CNRS, MNHN, UPMC, Sorbonne Université), Département Origines et Évolution, Muséum National d'Histoire Naturelle, Rue Buffon 8, 75005 Paris, France.
  • Bianucci G; Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, 56126 Pisa, Italy.
  • Di Celma C; Scuola di Scienze e Tecnologie, Università di Camerino, Via Gentile III da Varano 1, 62032 Camerino, Italy.
  • Salas-Gismondi R; Departamento de Paleontología de Vertebrados, Museo de Historia Natural-UNMSM, Avenida Arenales 1256, 14 Lima, Peru.
  • Steurbaut E; D.O. Terre et Histoire de la Vie, Institut Royal des Sciences Naturelles de Belgique, Rue Vautier 29, 1000 Brussels, Belgium; Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, 3001 Leuven, Belgium.
  • Urbina M; Departamento de Paleontología de Vertebrados, Museo de Historia Natural-UNMSM, Avenida Arenales 1256, 14 Lima, Peru.
  • de Muizon C; Centre de Recherche sur la Paléobiodiversité et les Paléoenvironnements-CR2P (CNRS, MNHN, UPMC, Sorbonne Université), Département Origines et Évolution, Muséum National d'Histoire Naturelle, Rue Buffon 8, 75005 Paris, France.
Curr Biol ; 27(10): 1535-1541.e2, 2017 May 22.
Article em En | MEDLINE | ID: mdl-28502655
Although combined molecular and morphological analyses point to a late middle Eocene (38-39 million years ago) origin for the clade Neoceti (Odontoceti, echolocating toothed whales plus Mysticeti, baleen whales, and relatives), the oldest known mysticete fossil dates from the latest Eocene (about 34 million years ago) of Antarctica [1, 2]. Considering that the latter is not the most stemward mysticete in recent phylogenies and that Oligocene toothed mysticetes display a broad morphological disparity most likely corresponding to contrasted ecological niches, the origin of mysticetes from a basilosaurid ancestor and its drivers are currently poorly understood [1, 3-8]. Based on an articulated cetacean skeleton from the early late Eocene (Priabonian, around 36.4 million years ago) of the Pisco Basin, Peru, we describe a new archaic tooth-bearing mysticete, Mystacodon selenensis gen. et sp. nov. Being the geologically oldest neocete (crown group cetacean) and the earliest mysticete to branch off described so far, the new taxon is interpreted as morphologically intermediate between basilosaurids and later toothed mysticetes, providing thus crucial information about the anatomy of the skull, forelimb, and innominate at these critical initial stages of mysticete evolution. Major changes in the morphology of the oral apparatus (including tooth wear) and flipper compared to basilosaurids suggest that suction and possibly benthic feeding represented key, early ecological traits accompanying the emergence of modern filter-feeding baleen whales' ancestors.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Baleias / Evolução Biológica / Comportamento Alimentar / Fósseis Limite: Animals País/Região como assunto: America do sul / Peru Idioma: En Revista: Curr Biol Assunto da revista: BIOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de publicação: Reino Unido
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Baleias / Evolução Biológica / Comportamento Alimentar / Fósseis Limite: Animals País/Região como assunto: America do sul / Peru Idioma: En Revista: Curr Biol Assunto da revista: BIOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de publicação: Reino Unido