Fossil Nelumbonaceae from the La Colonia Formation (Campanian–Maastrichtian,Upper Cretaceous), Chubut,Patagonia, Argentina |
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| Affiliation: | 1. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, China;2. Earth Sciences, Negaunee Integrative Research Center, Field Museum of Natural History, Chicago, IL 60605, USA;3. Qingdao Research Institute of Geotechnical Prospecting and Surveying, Qingdao 266030, China;4. School of Earth and Environment, Anhui University of Science & Technology, Huainan 232001, China;5. Chicago Botanic Garden, Glencoe, IL 60022, USA;6. Oak Spring Garden Foundation, Upperville, VA 20184, USA;7. Yale School of the Environment, Yale University, New Haven, CT 06511, USA;1. Guangxi Museum of Natural History, Nanning, Guangxi 530012, China,;2. Florida Museum of Natural History, University of Florida, Gainesville, FL 32611-7800, USA;1. State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China;2. State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS, Nanjing 210008, China;3. College of Materials and Energy, South China Agricultural University, Guangzhou, Guangdong, China;4. School of Earth Science and Resources, Chang''an University, Xi''an 710054, China;5. Department of Botany and Plant Biotechnology, University of Johannesburg, Auckland Park, 2006 Johannesburg, South Africa;6. Komarov Botanical Institute of the Russian Academy of Sciences, Prof. Popov str. 2, St. Petersburg 197376, Russia;1. Museum of Nature South Tyrol, Bindergasse/Via Bottai 1, 39100 Bozen/Bolzano, Italy;2. Department of Earth and Environmental Sciences, Paleontology and Geobiology, Ludwig-Maximilians-Universität München, Richard-Wagner-Straße 10, 80333 München, Germany;3. SNSB-Bayerische Staatssammlung für Paläontologie und Geologie, Richard-Wagner-Straße 10, 80333 München, Germany |
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| Abstract: | We describe here fossil leaves and fruits assignable to the family Nelumbonaceae Dumortier 1828. Fossils were collected at the Cañadón del Irupé locality, La Colonia Formation (Campanian–Maastrichtian, Upper Cretaceous), Chubut Province, Patagonia, Argentina. The fossil leaves are simple, with symmetrical and peltate lamina, orbicular in shape, and an entire margin. The venation is truly actinodromous with at least 15 primary veins, the secondary veins are poorly developed and intercalated with the primary veins, the third category vein is opposite, and the areoles are well-developed and 4- to 5-sided. These features are characteristic of the extant genus Nelumbo Adamson 1763, and the presence of these characters in the fossils allows their placement within this genus. Reproductive structures, similar to the fruit-receptacle of Nelumbo with fruits in situ, were found associated but not in organic connection with the leaves. These fossils constitute the only and oldest record for the family in the Southern Hemisphere. This record indicates that Nelumbo was more widespread in the past than today. |
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