Colletotrichum macroconidii sp. nov. and six new records of Colletotrichum (Glomerellaceae, Glomerellales) from southwestern China

By

Norphanphoun, Chada
Zou, Mengting
Liu, Feng-Quan
Wang, Yong

Type

Article

Date of Publication

2025-9-18

Original Publication

MycoKeys

Volume

122

Pages

321--373

Subjects

1 new species , 1 new species , 1 new species , Ascomycota , molecular phylogeny , Morphology , new record , species complex , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.122.161122

 

Abstract

Colletotrichum, a genus in the phylum Ascomycota and the family Glomerellaceae, is globally recognized as a significant plant pathogen affecting various hosts. In this study, 31 Colletotrichum strains were isolated from plant hosts in southwestern China, specifically from Guizhou and Yunnan Provinces. Phylogenetic and morphological analyses revealed one novel species, Colletotrichum macroconidiisp. nov., and 11 previously known species. Six of these species represent new host and regional records: C. fioriniae, C. trichellum, C. juglandicola, C. nanhuaense, C. jiangxiense, and C. magnum, in addition to five known species: C. nymphaeae, C. metake, C. fructicola, C. siamense, and C. gloeosporioides. Multilocus phylogenetic analyses placed strains of C. jiangxiense in a well-supported clade with C. nullisetosum, C. oblongisporum, C. gracile, and C. tengchongense, which are here treated as synonyms due to their nomenclatural invalidity, morphological overlap, and phylogenetic evidence. Similarly, C. speciosum and C. simulanticitri clustered with C. nymphaeae and are synonymized with it based on insignificant genetic divergence and invalid nomenclatural status. Species identification was conducted using a comprehensive approach that combined multilocus phylogenetic analysis with detailed morphological characterization. This expanded dataset significantly contributes to our understanding of the genetic diversity and ecological distribution of Colletotrichum in southwestern China.