LATE CRETACEOUS TERRESTRIAL VERTEBRATES FROM MADAGASCAR: IMPLICATIONS FOR LATIN AMERICAN BIOGEOGRAPHY1
Authors:
- David W. KrauseDKDavid W. Krause
- Patrick M. O'ConnorPOPatrick M. O'Connor
- Kristina Curry RogersKRKristina Curry Rogers
- Scott D. SampsonSSScott D. Sampson
- Gregory A. BuckleyGBGregory A. Buckley
- Raymond R. RogersRRRaymond R. Rogers
- 23 August 2006
- journal article
- Published by Missouri Botanical Garden Press in Annals of the Missouri Botanical Garden
- Vol. 93 (2) , 178-208
Abstract
The Mahajanga Basin Project, initiated in 1993 and centered in Upper Cretaceous strata of northwestern Madagascar, has resulted in the discovery of some of the most complete, well-preserved, and significant specimens of Late Cretaceous vertebrate animals from the Southern Hemisphere and indeed the world. Among the most important finds are various specimens of crocodyliforms, non-avian dinosaurs, and mammals; these finds have the potential to provide key insights into the biogeographic and paleogeographic history of Gondwana. Madagascar has been physically isolated from Africa for over 160 million years and from all other major landmasses for more than 85 million years. The closest known relatives of many of the Late Cretaceous Malagasy taxa are penecontemporaneous forms from South America (primarily Argentina) and India, thus documenting a previously unrecognized high level of cosmopolitanism among Gondwanan vertebrates near the end of the Cretaceous. The family-level taxa that are shared among M... Resumen El proyecto de la cuenca de Mahajanga, iniciado en 1993 y centrado en los estratos del Cretácico superior en el noroeste de Madagascar, ha resultado en el descubrimiento de algunos de los especímenes más completos, mejor preservados y más significativos de animales vertebrados del Cretácico tardío del hemisferio sur y de hecho del mundo. Entre los hallazgos más importantes son los varios especímenes de crocodiliformes, dinosaurios no-aviares y mamíferos; estos hallazgos tienen el potencial de adentrarse en puntos claves en la historia biogeográfica y paleogeográfica de Gondwana. Madagascar ha estado físicamente aislada de África por más de 160 millones de años y del resto de masas importantes de tierra por más de 85 millones de años. Los parientes cercanos conocidos de muchos de los taxones malgaches del Cretácico tardío son formas penecontemporáneas de América del Sur (sobre todo de Argentina) y la India, documentando así un alto nivel cosmopolita previamente desconocido entre los vertebrados de ...Keywords
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