Three new taxa of the lichen genus Lobothallia (Megasporaceae, Ascomycota) from China

By

Zhang, Yanyun (Botanist)
Wang, Lun
Yu, Xinmeng
Cheng, Su
Liu, Junlan
Wang, Xinyu

Type

Article

Date of Publication

2024

Original Publication

MycoKeys

Volume

108

Pages

351--369

Subjects

new species , new variety , Qinghai-Tibetan Plateau , saxicolous lichen , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.108.126994

 

Abstract

Two new species; Lobothallia crenulata Lun Wang & Y. Y. Zhang, L. lobulata Lun Wang & Y. Y. Zhang and one new variety; L. subdiffracta var. rimosa Lun Wang & Y. Y. Zhang, are reported from China and described, based on morphological, chemical and molecular characters. Phylogenetic analyses showed that these new taxa form monophyletic groups. Lobothallia crenulata and L. lobulata, together with L. hydrocharis, L. radiosa and L. recedens, form a well-supported clade, whereas L. subdiffracta var. rimosa is nested within the samples of L. subdiffracta. Lobothallia crenulata is characterised by its placodioid thallus, thickly pruinose upper surface with a rimose appearance, aspicilioid to lecanorine apothecia with a crenate thalline margin and concave, black and pruinose discs. Lobothallia lobulata is characterised by its placodioid thallus, pruinose upper surface with lobules, aspicilioid when immature, lecanorine to zeorine apothecia at maturity and concave to plane, dark brown, shiny and epruinose discs. Lobothallia subdiffracta var. rimosa is characterised by its areolate thallus, rimose and pruinose upper surface, lecanorine apothecia and slightly concave to plane, black and pruinose discs. Secondary metabolites were not detected in the two new species nor the new variety. A key is provided for the species of Lobothallia in China.