Abstract
During the period from 2018 to 2020, a survey of macrofungi in northern Thailand was conducted and seven specimens of Volvariella were collected. The morphological characteristics and phylogenetic analyses of the internal transcribed spacers (ITS) and large subunit (nrLSU) of the nuclear ribosomal DNA (rDNA) sequence data indicated that three specimens belonged to V. bombycina and V. volvacea. Four other specimens were distinct from all other known species within the genus Volvariella. We described these specimens as two new species, namely V. neovolvacea and V. thailandensis. Comprehensive descriptions, illustrations, line drawings, and a phylogenetic tree are provided to show the position of the two new species. The comparisons between morphologically similar and phylogenetically related species are also discussed.
Highlights
The genus Volvariella was first proposed in 1898 with V. argentina as the species type
Phylograms of the maximum likelihood (ML) and Bayesian inference (BI) analyses were similar in terms of topology
Morphological characteristics have been used in the identification of Volvariella species [5,7,9,11]
Summary
The genus Volvariella was first proposed in 1898 with V. argentina as the species type. Volvariella species are known to be widely distributed throughout Africa, Asia, Australasia, Europe, and America [1,2,3,4,5,6,7,8]. They are recognized as saprobes and are mostly found on the ground in grasslands or forests. There are 143 records of Volvariella names in the Index Fungorum (Index Fungorum 2021, accessed on February 2022), including specific and infraspecific taxa, illegitimate names, invalid names, and names widely accepted as taxonomic synonyms These names can include species that have not yet been welldocumented and may include misidentifications
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