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Towards a natural classification of Sapotaceae subfamily Chrysophylloideae in Oceania and Southeast Asia based on nuclear sequence data
Swedish Museum of Natural History, Department of Botany.
Swedish Museum of Natural History, Department of Botany.
2013 (English)In: Taxon, ISSN 0040-0262, Vol. 63, 746-770 p.Article in journal (Refereed) Published
Abstract [en]

Generic limits within subfamily Chrysophylloideae (Sapotaceae) from Oceania and Southeast Asia are reconciled based on a molecular phylogeny. We analysed sequences of nuclear ribosomal DNA (ETS, ITS) and the nuclear gene RPB2 with BEAST and parsimony jackknifing, using a sample of 168 terminals. Eight morphological characters were traced on a condensed majority-rule consensus tree to identify diagnostic character combinations for the genera. Accepted genera with character support are Magodendron, Pichonia, Planchonella, Pycnandra, Sersalisia, and Van-royena, while Beccariella and Niemeyera require amendment. Beccariella, a widely distributed group, is an illegitimate later homonym and we propose that the genus Pleioluma is resurrected in its place. The Australian genus Niemeyera is paraphyletic, but it is rendered monophyletic by reinstating Amorphospermum for N. antiloga. Beauvisagea, Blabeia, Fontbrunea, and Krausella are all segregates of Planchonella and rejected, while Wokoia is a later synonym of Pichonia. Planchonella baillonii, an endemic species of New Caledonia, is the sole member of an old lineage and firmly placed as the sister to a clade comprising the other congeners. Planchonella sandwicensis, a Hawaiian species, previously proposed to be a distinct genus, is a member of Planchonella. In the Pacific, P. tahitensis (including P. grayana) is a polymorphic species, widely distributed and adapted to a wide range of habitats. We provide a generic key (excluding Xantolis), diagnostic character combinations for all genera, and the necessary taxonomic combinations for Pichonia, Planchonella, Pleioluma, and Sersalisia to render each genus monophyletic.

Place, publisher, year, edition, pages
2013. Vol. 63, 746-770 p.
Keyword [en]
Amorphospermum; Australasia; Ericales; morphology; Pacific Ocean; phylogeny; Pleioluma; Sapotaceae
National Category
Biological Systematics
Research subject
Diversity of life
URN: urn:nbn:se:nrm:diva-55DOI: 10.12705/624.11OAI: diva2:661934
Available from: 2013-11-05 Created: 2013-11-05 Last updated: 2015-01-13Bibliographically approved

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