Two new species of Colletotrichum (Glomerellaceae, Glomerellales) and a new host record for Colletotrichum karsti on Rosa chinensis from southwestern China

By

Norphanphoun, Chada
Wang, Jia-Ping
Wang, Xing-Chang
Aumentado, Herbert Dustin
Liu, Feng-Quan
Wang, Yong

Type

Article

Date of Publication

2025-9-18

Original Publication

MycoKeys

Volume

122

Pages

293--319

Subjects

Ascomycota , Fungal diversity , fungal morphologically , geographical record , molecular phylogeny , Phylogeny , species complex , synonymy , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.122.161091

 

Abstract

Colletotrichum, a genus of ascomycetous fungi in the family Glomerellaceae, includes many important plant pathogens worldwide. In this study, eight fungal strains collected from plant hosts in southwestern China (Guizhou and Yunnan provinces) were identified as four species of Colletotrichum. Two novel species, Colletotrichum actinidicola and Colletotrichum poalesicola, are described based on morphological characteristics and multilocus (ITS, gapdh, chs-1, act, β-tubulin, his3, and cal) phylogenetic analyses. Phylogenetic analyses placed strains of Colletotrichum fici in a well-supported clade with Colletotrichum boninense, and these taxa are treated as synonyms of Colletotrichum boninense. Similarly, Colletotrichum wuxuhaiense clustered with Colletotrichum karsti and is synonymized with it based on genetic divergence and morphological similarity. Additionally, Colletotrichum karsti isolated from Rosa chinensis (Rosaceae), is introduced as a new host record. One previously known species, Colletotrichum boninense, was also recorded. The integration of molecular and morphological data facilitated accurate species delimitation and improved understanding of Colletotrichum diversity in this region. These findings contribute to the growing body of knowledge on the taxonomy, host associations, and distribution of Colletotrichum species in Asia.