Early angiosperm diversification: evidence from southern South America |
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| Authors: | Sergio Archangelsky Viviana Barreda Mauro G Passalia Maria Gandolfo Mercedes Prámparo Edgardo Romero Rubén Cúneo Alba Zamuner Ari Iglesias Magdalena Llorens Gabriela G Puebla Mirta Quattrocchio Wolfgang Volkheimer |
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| Institution: | 1. División Paleobotánica, Museo Argentino de Ciencias Naturales B. Rivadavia, CONICET, Av. Angel Gallardo 470, C1405DJR, Buenos Aires, Argentina;2. Instituto de Investigaciones en Biodiversidad y Medioambiente, CONICET-UNCo, Quintral 1250 (8400), San Carlos de Bariloche, Argentina;3. L.H. Bailey Hortorium, Department of Plant Biology, Cornell University, Ithaca, NY 14853, USA;4. IANIGLA-CCT CONICET, Adrián Ruiz Leal s/n, Casilla Correo 131, C5500, Mendoza, Argentina;5. Museo Paleontológico Egidio Feruglio, Av. Fontana 140, C9100, Trelew, Chubut, Argentina;6. División de Paleobotánica, Facultad de Ciencias Naturales y Museo de La Plata, Paseo del Bosque s/n, C1900, La Plata, Argentina;7. CNEA Regional Patagonia, 26 de Noviembre s/n CC 178 (9100), Trelew, Argentina;8. Departamento de Geología, Universidad del Sur, San Juan 670, C8000, Bahía Blanca, Argentina |
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| Abstract: | In this report, we analyze the angiosperm fossil record (micro- and megafossil) from the central and southern basins of Argentina, southern South America, deposited between the late Barremian (128.3 Ma) to the end of the Coniacian (85.8 Ma). Based on this analysis, three major stages in the evolution of the angiosperms in the southernmost region of South America are established as follows: the late Barremian–Aptian, the latest Aptian-earliest Albian, and the middle Albian- Coniacian. The comparison between our fossil data set and those from Australia, North America, Asia and Europe suggest that the evolution and diversification of the angiosperms at mid and high latitudes in both hemispheres occurred roughly synchronously. |
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