The genus Phaeanthus (Annonaceae, Miliuseae) in Thailand: P. piyae sp. nov. and resurrection of P. lucidus, with molecular phylogenetic analyses

Phaeanthus piyae, a new species from southern Thailand, is described and illustrated. It is morphologically most similar to P. intermedius, which occurs in Peninsular Malaysia, Singapore, Riau Islands, and Sumatra. The new species can be distinguished from P. intermedius by the longer peduncles and...

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Bibliographic Details
Published inTAIWANIA Vol. 66; no. 4; pp. 509 - 516
Main Authors Chattida WIYA, Kithisak AONGYONG, Anissara DAMTHONGDEE, Abdulromea BAKA, Tanawat CHAOWASKU
Format Journal Article
LanguageChinese
Published 台灣 國立臺灣大學生命科學院 01.11.2021
Subjects
Miliuseae
molecular phylogeny
new species
Phaeanthus
resurrection
SCIE
Scopus
taxonomy
Thailand
TSCI
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Summary:Phaeanthus piyae, a new species from southern Thailand, is described and illustrated. It is morphologically most similar to P. intermedius, which occurs in Peninsular Malaysia, Singapore, Riau Islands, and Sumatra. The new species can be distinguished from P. intermedius by the longer peduncles and pedicels; triangular (vs. filiform-narrowly triangular) sepals; and stigmas that are larger and ± elongated club-shaped (vs. ± ellipsoid). The conservation status of P. piyae is provisionally assessed. In addition, molecular phylogenetic analyses using up to seven plastid DNA regions (matK, ndhF, rbcL and ycf1 exons; trnL intron; psbA-trnH and trnL-trnF intergenic spacers) and including, among others, five Phaeanthus accessions are carried out. Phaeanthus piyae is sister to a clade composed of the remaining accessions of Phaeanthus. Furthermore, southern Thailand also harbors a second species of Phaeanthus, which appears to be P. lucidus, a heterotypic synonym of P. splendens. Phaeanthus lucidus is herein reinstate
ISSN:0372-333X