Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

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Record number 445735
Title Integrative systematics supports the establishment of Winitia, a new genus of Annonaceae (Malmeoideae, Miliuseae) allied to Stelechocarpus and Sageraea
Author(s) Chaowasku, T.; Ham, R.W.J.M. van der; Chatrou, L.W.
Source Systematics and Biodiversity 11 (2013)2. - ISSN 1477-2000 - p. 195 - 207.
Department(s) Biosystematics
Publication type Refereed Article in a scientific journal
Publication year 2013
Keyword(s) molecular phylogenetics - uvaria annonaceae - historical biogeography - pseuduvaria annonaceae - pollen morphology - polyalthia - revision - delimitation - genera - clade
Abstract The generic circumscriptions of Stelechocarpus and Sageraea (Annonaceae) are assessed using molecular phylogenetic, macromorphological, and pollen morphological evidence. For molecular phylogenetic analysis the combined seven plastid markers: rbcL exon, trnL intron, trnL-F spacer, matK exon, ndhF exon, psbA-trnH spacer, and ycf1 exon constituting c. 7 kb are used. The results corroborate the recognition of a maximally supported clade as a new genus, Winitia. It is weakly to moderately supported as sister to Stelechocarpus burahol, the type and only species of Stelechocarpus. A clade consisting of Winitia and Stelechocarpus is strongly supported as sister to Sageraea, which is monophyletic with strong support. Winitia consists of two species, one of which (W. expansa) is proposed as a new species endemic to Thailand, whereas one new combination (W. cauliflora) is made. The new genus is primarily characterized by (1) multicolumellar stigmas (= 5 columns per stigma) and (2) pollen grains with a very thin tectum, a more or less columellate/coarsely granular infratectum, and a very distinct basal layer. The macromorphology and pollen morphology of the three genera (Stelechocarpus, Winitia, and Sageraea) are highlighted.
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