Research Paper

Trichoderma yilanense (Hypocreales), a new species from Taiwan

Yu-Hui Wei, Guey-Yuh Liou, Shean-Shong Tzean, Sung-Yuan Hsieh

Published on: 13 May 2025

Page: 382 - 388

DOI: 10.6165/tai.2025.70.382

Abstract

Trichoderma species are widely distributed and omnipresent. They are important for agriculture, industry, and the environment. This study introduces and illustrates a new species, Trichoderma yilanense, based on both morphological and molecular evidence. Phylogenetic analyses were conducted using sequences from rDNA ITS1-5.8S-ITS2 (ITS), the translation elongation factor 1-alpha (tef1) and the RNA polymerase II subunit (rpb2) gene regions. The results support the classification of the new species as a distinct member within the Harzianum clade of the genus Trichoderma. Furthermore, the morphological similarities and differences between the new species and its phylogenetically close relatives are discussed.

Keyword: Harzianum clade, new species, phylogeny, taxonomy, Trichoderma pinicola, Trichoderma simplex

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