Morphological and phylogenetic analyses reveal three new species and one new record of Tubeufia (Tubeufiales, Tubeufiaceae) from southern China

Abstract

During an investigation of helicosporous fungi in China, a total of seven helicosporous hyphomycetes were obtained from decaying wood in the southern region of the country. Based on phylogenetic analyses using a combined LSU, ITS, tef1α, and rpb2 sequence matrix, in conjunction with morphological comparisons, these taxa were classified within Tubeufia (Tubeufiaceae, Tubeufiales) and were recognized as three new species, viz. Tubeufia guttulata, T. hainanensis, and T. muriformis, as well as one new distribution record, viz. T. cocois. Evidence for these new taxa and the new record, descriptions, illustrations, notes, and phylogenetic evidence are provided for the newly collected helicosporous species.

Three new species of Neohelicomyces (Tubeufiales, Tubeufiaceae) from freshwater and terrestrial habitats in China

“…The conidial morphology of most Neohelicomyces species closely resembles those of Helicomyces and the typical helicoid Tubeufia genera ( Zhao et al 2007 ; Luo et al 2017 ; Lu et al 2018b ; Ma et al 2023b ). However, most Neohelicomyces species can easily be distinguished by their longer, hyphae-like and conspicuous conidiophores, when compared to those of Helicomyces and Tubeufia ( Morgan 1892 ; Linder 1929 ; Rao and Rao 1964 ; Goos 1985 ; Zhao et al 2007 ; Hyde et al 2016 ; Lu et al 2017b , 2018b , 2023b ; Kuo and Goh 2018 ; Tian et al 2022 ; Ma et al 2023b ). Only two species, Neohelicomyces longisetosus and N. thailandicus , exhibit morphological variations in conidiophores when compared to other Neohelicomyces species.…”

“…Previous studies have primarily focused on systematics and taxonomic research of helicosporous hyphomycetes ( Abdel-Wahab et al 2010 ; Boonmee et al 2011 , 2014 ; Lu et al 2017a , 2017b , 2017c , 2018a , 2023a , 2023b ; Kuo and Goh 2018 ; Lu and Kang 2020 ; Li et al 2022a , 2022b ; Ma et al 2023a , 2023b ; Xiao et al 2023 ; Zhang et al 2023 ). Recent studies on the natural products of some members from Neohelicomyces genus have shown that two compounds from N. hyalosporus (PF11-1) exhibited moderate cytotoxicity against human cancer cells (A549, TCA, RD) ( Zheng et al 2023 ).…”