Wurdack Kenneth J, Michelangeli Fabián A
Department of Botany, MRC-166 National Museum of Natural History, Smithsonian Institution, P.O. Box 37012, Washington, DC 20013-7012, USA National Museum of Natural History, Smithsonian Institution Washington United States of America.
The New York Botanical Garden, 2900 Southern Blvd., Bronx, NY 10458, USA The New York Botanical Garden New York United States of America.
PhytoKeys. 2019 Dec 10;136:1-21. doi: 10.3897/phytokeys.136.38558. eCollection 2019.
The systematics of , herbs endemic to the Pakaraima Mountains of western Guyana, is reviewed and K.Wurdack & Michelang., from the summit of Kamakusa Mountain is described as the second species in the genus. The new species is distinguished from its closest relative, , by striking vegetative differences, including number of leaves per stem and leaf architecture. A phylogenetic analysis of sequence data from three plastid loci and Melastomataceae-wide taxon sampling is presented. The two species of are recovered as monophyletic and associated with mostly Old World tribe Sonerileae. Fruit, seed and leaf morphology are described for the first time, biogeography is discussed and both species are illustrated.
对圭亚那西部帕卡赖马山脉特有的草本植物的系统学进行了综述，并将来自卡马库萨山山顶的K.Wurdack & Michelang.描述为该属的第二个物种。新物种与其最亲近的近缘种通过显著的营养差异区分开来，包括每茎的叶片数量和叶片结构。给出了来自三个质体位点的序列数据的系统发育分析以及野牡丹科全类群抽样情况。该属的两个物种被确定为单系类群，并与主要分布于旧世界的肖野牡丹族相关。首次描述了果实、种子和叶片形态，讨论了生物地理学，并对两个物种进行了绘图说明。
