Taxonomy and phylogeny of the novel rhytidhysteron-like collections in the Greater Mekong Subregion

By

ren, guangcong
Dhanushka N., Wanasinghe
Jeewon, Rajesh
Monkai, Jutamart
Mortimer, Peter E.
Hyde, Kevin D
Xu, Jianchu
Gui, Heng

Type

Article

Date of Publication

2022

Original Publication

MycoKeys

Volume

86

Pages

65--85

Subjects

Ascomycota , one new taxon , Phylogeny , saprobic , taxonomy , Yunnan

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.86.70668

 

Abstract

During our survey into the diversity of woody litter fungi across the Greater Mekong Subregion, three rhytidhysteron-like taxa were collected from dead woody twigs in China and Thailand. These were further investigated based on morphological observations and multi-gene phylogenetic analyses of a combined DNA data matrix containing SSU, LSU, ITS, and tef1-α sequence data. A new species of Rhytidhysteron, R. xiaokongense sp. nov. is introduced with its asexual morph, and it is characterized by semi-immersed, subglobose to ampulliform conidiomata, dark brown, oblong to ellipsoidal, 1-septate, conidia, which are granular in appearance when mature. In addition to the new species, two new records from Thailand are reported viz. Rhytidhysteron tectonae on woody litter of Betula sp. (Betulaceae) and Fabaceae sp. and Rhytidhysteron neorufulum on woody litter of Tectona grandis (Lamiaceae). Morphological descriptions, illustrations, taxonomic notes and phylogenetic analyses are provided for all entries.