Teixeiria lusitanica, a new fossil flower from the Early Cretaceous of Portugal with affinities to Ranunculales |
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Authors: | M von Balthazar K Raunsgaard Pedersen E M Friis |
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Institution: | 1. Department of Palaeobotany, Swedish Museum of Natural History, SE-10405, Stockholm, Sweden 2. Department of Geology, University of Aarhus, Aarhus-C, DK-8000, ?rhus, Denmark
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Abstract: | A charcoalified fossil flower bud of a new genus and species (Teixeiria lusitanica) is described from the Early Cretaceous of Portugal. The flower is actinomorphic and unisexually male. At the base of the
bud there are several bracts of different sizes, which are followed by sepal-like and petal-like tepals. Bracts and perianth
organs seem to be arranged spirally and to exhibit transitions between different organ categories. The androecium has numerous
stamens in two sizes, but with unclear arrangement. Pollen is small and tricolpate with a perforate tectum and a densely columellate
infratectal layer. No carpels or remains of carpels could be observed on the floral axis. Teixeiria lusitanica shows most affinities to members of Ranunculales. There are also some similarities with Berberidopsis (Berberidopsidaceae, Berberidopsidales) and members of the Saxifragales (Hamamelidaceae and Daphniphyllaceae). |
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Keywords: | Berberidopsidales Early Cretaceous eudicots flowers fossils Portugal Ranunculales Saxifragales Teixeiria lusitanica |
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