Premium
Phylogenetic affinities of Polyalthia species (Annonaceae) with columellar‐sulcate pollen: Enlarging the Madagascan endemic genus Fenerivia
Author(s) -
Saunders Richard M.K.,
Su Yvonne C.F.,
Xue Bine
Publication year - 2011
Publication title -
taxon
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 81
eISSN - 1996-8175
pISSN - 0040-0262
DOI - 10.1002/tax.605016
Subject(s) - biology , polyphyly , ndhf , genus , monophyly , phylogenetic tree , botany , maximum parsimony , clade , evolutionary biology , zoology , genetics , gene
Abstract The genus Polyalthia (Annonaceae) has been demonstrated to be polyphyletic, with the Asian species with columellar‐sulcate pollen recently segregated to form a new genus, Maasia . The phylogenetic affinities of the other Polyalthia species with columellar‐sulcate pollen, which occur in Madagascar, are investigated using maximum parsimony, maximum likelihood and Bayesian phylogenetic analyses of three chloroplast DNA markers ( trnL‐F, matK, rbcL ). The species are shown to form a well‐supported clade which warrants taxonomic recognition as a distinct genus. The name Fenerivia is adopted, considerably expanding the application of this formerly monotypic name, with nine new nomenclatural combinations validated. The genus is hypothesised to have undergone a homeotic mutation in which the outermost whorl of stamens develop as inner petals (presumed andropetals), and the calyx is reduced to a vestigial flange.