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Jaguariba wiersemana gen. nov. et sp. nov., an Early Cretaceous member of crown group Nymphaeales (Nymphaeaceae) from northern Gondwana

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Abstract:

Morphology and anatomy of a fossil nymphaealean plant, Jaguariba wiersemana gen. nov. et sp. nov. from the late Early Cretaceous of northeastern Brazil, and extant aquatic flowering plants are comparatively studied. Characteristic features indicate that Jaguariba gen. nov. is a member of Nymphaeaceae, and may belong to Nymphaeoideae. The occurrence of both Nymphaeaceae and Cabombaceae (e.g., Pluricarpellatia peltata) in the Lower Cretaceous contradicts recent molecular dating implying a Late Cretaceous–Early Tertiary divergence for those families. Furthermore, the morphology of the fossil and sedimentologic and taphonomic data indicate that Jaguariba gen. nov. had an aquatic ecology similar to living Nymphaeaceae. Thus the taxon was part of the aquatic vegetation of the Crato lake in association with Pluricarpellatia peltata, an earlier described cabombaceaen aquatic angiosperm.

Keywords: CABOMBACEAE; EARLY CRETACEOUS; MORPHOLOGY; NYMPHAEACEAE; SOUTH AMERICA

Document Type: Research Article

Affiliations: 1: Museum of Natural History, Leibniz Institute for Research on Evolution and Biodiversity, Department of Collections, Invalidenstr. 43, 10115 Berlin, Germany;, Email: clement.coiffard@ens-lyon.org 2: Museum of Natural History, Leibniz Institute for Research on Evolution and Biodiversity, Department of Collections, Invalidenstr. 43, 10115 Berlin, Germany 3: CEPPE-Post-Graduation, Research and Specialization Centre of the University of Guarulhos, Praça Theresa Cristina 1, 07023-070, Guarulhos (SP) Brazil; and Institute of Geosciences, University of São Paulo, Rua do Lago 562, Cidade Universitaria, 05508-080, São Paulo, Brazil

Publication date: February 20, 2013

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