Michaelmoelleria (Gesneriaceae), a new lithophilous dwelling genus and species with zigzag corolla tube from southern Vietnam

By

Wen, Fang
Xin, Zibing
Fu, Long-Fei
Li, Shu
Su, Lan-Ying
Maciejewski, Stephen
Huang, Zhang-Jie
Truong, Do Van, 1984-
Wei, Yi-Gang

Type

Article

Date of Publication

2020

Original Publication

PhytoKeys

Volume

146

Pages

89--107

Subjects

Cathayanthe , cliff-dwelling , Deinostigma , Didymocarpoideae , flora of Vietnam , IUCN , Phylogeny , Tribounia

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.146.49731

 

Abstract

Michaelmoelleria, a new genus from southern Vietnam is described with a single species, M. vietnamensis. The new genus is morphologically most similar to Deinostigma and Tribounia but it differs from the latter two by having four fertile stamens. Nuclear ribosomal internal transcribed spacer (ITS) region and plastid trnL-F intron spacer (trnL-F) DNA sequence data from the new genus and eighty-seven species representing 42 genera within tribe Didymocarpeae are used to resolve its generic placement. The molecular evidence reveals that it is most closely related to Cathayanthe rather than Deinostigma and Tribounia. The chromosome number is counted as 2n = 36 that further clarified its distinction comparing to the related genera within tribe Didymocarpeae. A global conservation assessment is also performed and classifies Michaelmoelleria vietnamensis as Critically Endangered (CR).