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Primer registro fósil de Pliometanastes sp. (Mammalia, Xenarthra, Megalonychidae) para el Mioceno superior de Costa Rica, América Central. Una nueva pista en la comprensión del Pre-GABI First fossil record of Pliometanastes sp. (Mammalia, Xenarthra, Megalonychidae) from the upper Miocene of Costa Rica, Central America. A new clue to understand the Pre-GABI

By Cesar A. Laurito and Ana L. Valerio

Abstract

Se describen molares inferiores y un único resto post-craneal de Pliometanastes cf. P. protistus Hirschfeld & Webb, 1968, procedentes de la localidad de San Gerardo de Limoncito (Hemphilliano temprano), cerca de la ciudad de San Vito en el sur de Costa Rica. Este hallazgo, cambia nuestro entendimiento de la ruta de dispersión de los primeros mamíferos suramericanos que alcanzaron América del Norte y validan al Arco de Islas Costa Rica-Panamá, como la vía más idónea de migración a pesar de las relativamente amplias barreras oceánicas.<br>Two lower molar teeth and a unique postcranial remain of Pliometanastes cf. P. protistus Hirschfeld & Webb, 1968, are described from the San Gerardo de Limoncito Locality (Early Hemphillian) in the Curré Formation near of the town of San Vito, Southern Costa Rica. This found changes our vision about the route of dispersion of the earliest South American mammals that reached North America and confirms the Costa Rican-Panama Island Arc like the most effective path of migration in spite of the relatively broad ocean gaps

Topics: Mammalia, Xenarthra, Megalonychidae, Pliometanastes, Mioceno Superior, Costa Rica, GABI, Mammalia, Xenarthra, Megalonychidae, Pliometanastes, Upper Miocene, Costa Rica, GABI, LCC:Geology, LCC:QE1-996.5, LCC:Science, LCC:Q, DOAJ:Earth Sciences, DOAJ:Earth and Environmental Sciences
Publisher: Universidad de Costa Rica
Year: 2012
OAI identifier: oai:doaj.org/article:ad3a85a6a74e45249c77053783f4a4af
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