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Type: Article
Published: 2020-06-23
Page range: 265–278
Abstract views: 61
PDF downloaded: 3

The non-monophyly of Dasymaschalon dasymaschalum (Annonaceae) revealed by a plastid DNA phylogeny, with D. halabalanum sp. nov. from Thailand and D. argenteum comb. nov.

Herbarium, Division of Plant Science and Technology, Department of Biology, Faculty of Science, Chiang Mai University, 239 Huay Kaew Rd., Chiang Mai 50200, Thailand. M.Sc. Program in Biology, Graduate School, Chiang Mai University, 239 Huay Kaew Rd., Chiang Mai 50200, Thailand.
Department of Microbiology, Faculty of Medicine, Khon Kaen University, 123 Mittraparp Rd., Khon Kaen 40002, Thailand.
Herbarium, Division of Plant Science and Technology, Department of Biology, Faculty of Science, Chiang Mai University, 239 Huay Kaew Rd., Chiang Mai 50200, Thailand.
Herbarium, Division of Plant Science and Technology, Department of Biology, Faculty of Science, Chiang Mai University, 239 Huay Kaew Rd., Chiang Mai 50200, Thailand.
molecular phylogenetics morphology new combination systematics taxonomy Magnoliids

Abstract

An extended molecular phylogeny of the genus Dasymaschalon (Annonaceae) has been reconstructed using up to six plastid DNA regions (matK, ndhF, rbcL exons; trnL intron; psbA-trnH, trnL-trnF intergenic spacers). The results unraveled the non-monophyly of a widely distributed D. dasymaschalum. A lineage of D. dasymaschalum native to Java and cultivated at Bogor Botanical Garden represents the true D. dasymaschalum, whereas the name Pelticalyx argentea is applicable to a distantly related clade of D. dasymaschalum from mainland Asia. Dasymaschalon argenteum comb. nov. is accordingly made. Additionally, the true D. dasymaschalum has been retrieved as the sister group of D. halabalanum, a new species from Narathiwat Province, southern Thailand herein described. Pedicel length, petal size and color, and the number of stamens per flower principally distinguish the new species from its sister group.