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.2007 Sep;44(3):1057-67.
doi: 10.1016/j.ympev.2007.03.002. Epub 2007 Mar 13.

A phylogeny of Anisophylleaceae based on six nuclear and plastid loci: ancient disjunctions and recent dispersal between South America, Africa, and Asia

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A phylogeny of Anisophylleaceae based on six nuclear and plastid loci: ancient disjunctions and recent dispersal between South America, Africa, and Asia

Li-Bing Zhang et al. Mol Phylogenet Evol.2007 Sep.

Abstract

The Anisophylleaceae comprise 29-34 species of shrubs and trees occurring in lowland forests and swamps in tropical Africa, Asia, and South America. These species are placed in four genera with disjunct geographic distributions; Anisophyllea has 25-30 species in South America, Africa, and Malesia; Combretocarpus has one species in Sumatra and Borneo; Poga one species in equatorial Africa; and Polygonanthus two in the Amazon Basin. Here we use a phylogeny based on six nuclear and plastid loci sequenced for 15 species representing the four genera to infer their relationships and the relative and absolute ages of the range disjunctions. Combretocarpus is sister to the other three genera, and Polygonanthus then sister to Poga and Anisophyllea. Ansiophyllea, represented by 12 species from all three continents, is monophyletic. A relaxed Bayesian clock calibrated with the oldest fossils from a relevant outgroup, Tetramelaceae, suggests that the disjunctions between Combretocarpus, Poga, and Polygonanthus date back to the Cretaceous, Mid-, and Upper Eocene, whereas the intercontinental disjunctions within Anisophyllea appear to date back only some 22-23 million years and thus probably result from long-distance dispersal.

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