Abstract

ABSTRACT During our surveys for discomycetes from 2019 to 2021 in forests and plantations in northern Thailand, several lambertella-like specimens were found. Morphological observation and BLAST search confirmed that seven newly collected specimens belong to Lambertella. Further phylogenetic analyses using maximum likelihood and Bayesian inference analysis based on combined the internal transcribed spacer region of rDNA (ITS), large subunit region of 28S rRNA (LSU), small subunit region of 18S rRNA (SSU) and RNA polymerase II gene (RPB2) sequence data and morphological examination coupled with chemical reactions confirmed seven Lambertella species. Lambertella aurantiaca and L. himalayensis were established as new geographical and host records, and the other five specimens, L. chiangraiensis, L. fusoidea, L. phanensis, L. sessilis and L. takensis, were introduced as novel species. The highlight of the current study is the contribution of the morphological description for Lambertella aurantiaca since its introduction in 1964, emending the morphological criteria for Lambertella sensu stricto, and providing sequence data for all Lambertella species described in the current study.

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