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Towards a natural classification of Sapotaceae subfamily Chrysophylloideae in Oceania and Southeast Asia based on nuclear sequence data
Naturhistoriska riksmuseet, Enheten för botanik.
Naturhistoriska riksmuseet, Enheten för botanik.
2013 (engelsk)Inngår i: Taxon, ISSN 0040-0262, E-ISSN 1996-8175, Vol. 63, s. 746-770Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2013. Vol. 63, s. 746-770
Emneord [en]
Amorphospermum; Australasia; Ericales; morphology; Pacific Ocean; phylogeny; Pleioluma; Sapotaceae
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URN: urn:nbn:se:nrm:diva-55DOI: 10.12705/624.11OAI: oai:DiVA.org:nrm-55DiVA, id: diva2:661934
Tilgjengelig fra: 2013-11-05 Laget: 2013-11-05 Sist oppdatert: 2023-10-16bibliografisk kontrollert

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Swenson et al. 2013(4863 kB)1427 nedlastinger
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