01858nas a2200241   4500008004100000020001400041245013600055210006900191300001200260490000700272520110400279100002201383700001901405700002001424700001301444700002001457700001901477700002301496700001401519700002201533700002301555856003801578       2007                        eng d  a1055-790300aRecent oceanic long-distance dispersal and divergence in the amphi-Atlantic rain forest genus <i>Renealmia </i>L.f. (Zingiberaceae)0 aRecent oceanic longdistance dispersal and divergence in the amph  a968-9800 v443 aRenealmia L.f. (Zingiberaceae) is one of the few tropical plant genera with numerous species in both Africa and South America but not in Asia. Based on phylogenetic analysis of nuclear ribosomal internal transcribed spacer (ITS) and chloroplast trnL-F DNA, Rellealmia is shown to be monophyletic with high branch support. Low sequence divergence found in the two genome regions (ITS: 0-2.4%; trnL-F: 0-1.9%) suggests recent diversification within the genus. Molecular divergence age estimates give further support to the recent origin of the genus and show that Renealmia has attained its amphi-Atlantic distribution by an oceanic long-distance dispersal event from Africa to South America during the Miocene or Pliocene (15.8-2.7 My ago). Some support is found for the hypothesis that speciation in neotropical Renealmia was influenced by the Andean orogeny. Speciation has been approximately simultaneous on both sides of the Atlantic, but increased taxon sampling is required to compare the speciation rates between the New World and Old World tropics. (c) 2007 Elsevier Inc. All rights reserved.1 aSärkinen, T., E.1 aNewman, M., F.1 aMaas, P., J. M.1 aMaas, H.1 aPoulsen, A., D.1 aHarris, D., J.1 aRichardson, J., E.1 aClark, A.1 aHollingsworth, M.1 aPennington, R., T.  u<Go to ISI>://WOS:000249845400004