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A dated species-tree approach to the trans-Pacific disjunction of the genus Jovellana (Calceolariaceae, Lamiales)

Journal article
Authors Stephan Nylinder
U. Swenson
Claes Persson
S. B. Janssens
Bengt Oxelman
Published in Taxon
Volume 61
Issue 2
Pages 381-391
ISSN 0040-0262
Publication year 2012
Published at Department of Biological and Environmental Sciences
Pages 381-391
Language en
Links www.ingentaconnect.com/content/iapt...
Keywords Asteridae, Calceolariaceae, divergence time, Jovellana, New Zealand, phylogeny, South America, long-distance dispersal, zealand mountain flora, rbcl sequence data, west wind drift, drake passage, southern-hemisphere, chloroplast dna, uncommon plants, global climate, north-america, le m, 1994, journal of biogeography, v21, p625
Subject categories Biological Sciences, Biological Systematics, Evolutionary Biology

Abstract

The genus Jovellana is the sister group to the larger genus Calceolaria, together composing the family Calceolariaceae. Four species are currently recognised, two in New Zealand J. sinclairii, J. repens) and two in Chile (J. punctata, J. violacea). The distribution is disjunct across the Pacific Ocean and has long been believed to be a remnant of an ancient vicariance following the break-up of Gondwana. In this study we infer a species-tree phylogeny of the genus using three chloroplast and four nuclear DNA sequences. By exploring three modes of estimating stem and crown ages of the family Calceolariaceae, a Jovellana species tree could be inferred and dated using a secondary calibration. With this approach we can demonstrate that genetic data, despite slightly different signals from unlinked and linked molecular markers, support the idea that the presence of Jovellana in New Zealand is the result of recent long-distance dispersal across the Pacific Ocean from South America.

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