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Abstract
Vento, B. & Prámparo, M. B., January 2018. Angiosperm association from the Río Turbio Formation (Eocene–?Oligocene), Santa Cruz, Argentina: Revision of Hünicken’s (Citation1955) fossil leaves collection, Alcheringa 42, 125–153. ISSN 0311-5518.
The Río Turbio Formation (Eocene–?Oligocene) is of particular paleobotanical interest owing to its combination of high fossil plant diversity associated with the coexistence of warm-temperate and cool-temperate components. As the first suite of fossils related to a documented stratigraphic section, Hünicken’s fossil plant collection is one of the most important from the Paleogene of South America. A total of 34 angiosperm species from the collection were reviewed and taxonomically updated, with Nothofagus as the dominant genus. The taxa identified indicate a warm and humid climate with the development of some elements of a cool-temperate climate marked by a transitional climate change to cooler conditions. The comparison of angiosperms from different paleofloras from the southernmost of South America confirms that the assemblage of Río Turbio Formation was similar to that of the Río Pichileufú area, both from Patagonia, Argentina.
Bárbara Vento [[email protected]] Mercedes B. Prámparo [[email protected]] Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA) CCT-CONICET, Mendoza, Adrián Ruiz Leal s/n, Casilla Correo 131, C5500, Mendoza, Argentina.
Acknowledgements
The authors are grateful to Dr A. Tauber, curator of the paleobotanical collection, Paleontological Museum, University of Córdoba, Argentina, for making available the fossil remains studied herein, and to Dr G. Hoke for the English revision and the comments; to Dr M. Gandolfo and K. Nixon for the suggestions on the manuscript; to Dr E. Martínez-Carretero (IADIZA-CONICET) for the collaboration in the determination of some specimens using living species; and to Dr C. Mays and four anonymous reviewers that improved greatly this work with their suggestions.
