Publication Type: | Journal Article |
Year of Publication: | 2014 |
Authors: | Nauheimer, L., Boyce P. C. |
Journal: | Plant Systematics and Evolution. Vienna, New York |
Volume: | 300 |
Issue: | 4 |
Start Page: | 709 |
Pagination: | 715 |
Date Published: | 09/2013 |
ISSN: | 0378-2697 |
Keywords: | Alocasia hypnosa, Colocasioideae, Limestone, Southeast Asia, SW China |
Abstract: | The new monotypic genus Englerarum Nauheimer & P.C.Boyce, with the only species Englerarum hypnosum (J.T.Yin, Y.H.Wang & Z.F.Xu) Nauheimer & P.C.Boyce, is here described. The new combination of Alocasia hypnosa J.T.Yin, Y.H.Wang & Z.F.Xu, with exclusion of Alocasia (Schott) G.Don and transfer into Englerarum, is based on molecular phylogenies using plastid and nuclear data. The plant occurs on forested limestone outcrops in tropical and subtropical continental Southeast Asia, ranging from Southwest China, through the Lao PDR, and into North and Southeast Thailand. |
URL: | http://link.springer.com/article/10.1007%2Fs00606-013-0914-7 |
DOI: | 10.1007/s00606-013-0914-7 |
Full Text | The number of recognized genera in the family Araceae has increased in the last few years from 105 (Mayo et al. 1997) to 118. Reasons for this, besides for the inclusion of the duckweeds (as Lemnoideae) in the family, are the discovery of new species of e.g., Pichinia P.C.Boyce & S.Y.Wong (Wong and Boyce 2010b) and Lorenzia E.G.Gonç (Gonçalves 2012) and new taxonomic work on the highly speciose Schismatoglottideae group (Boyce and Wong 2008; Wong and Boyce 2010a, c). In addition, new molecular phylogenetic studies have shown the non-monophyly of already described genera and resulted into new combinations such as in Croatiella E.G.Gonc¸, Incarum E.G.Gonç (Gonçalves 2005), and Typhonium Schott (Cusimano et al. 2010). Molecular analyses of four plastid regions (trnL, trnL-F, trnK/matK, and rpl20-rps12) and one nuclear gene (phyC) revealed that the species described as Alocasia hypnosa J.T.Yin, Y.H.Wang & Z.F.Xu has to be excluded of Alocasia (Schott) G.Don to maintain the monophyly of Alocasia (Nauheimer et al. 2012a). Plastid and nuclear phylogenies both corroborated that A. hypnosa is not a part of any closely related genera, but represents its own and separate lineage next to the four major clades in the Pistiaclade (sensu Cusimano et al. 2011), the Colocasia-clade (comprising Ariopsis J.Graham, Colocasia Schott, Remusatia Schott, and Steudnera K.Koch), the Areae-clade (comprising the tribes Areae and Arisaemateae), and the Alocasia-clade (Alocasia and Leucocasia Schott). |
Englerarum (Araceae, Aroideae): a new genus supported by plastid and nuclear phylogenies
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