New Species of Tomentella (Thelephorales, Basidiomycota) from Temperate Continental Mountain Climate of China (Xinjiang Region)

Abstract

Species in the genus Tomentella are distributed throughout the temperate and tropical regions worldwide, but few studies associated with the taxonomy and phylogeny of this genus had been reported from Northwest China. In this paper, molecular phylogenetic analyses of the nuclear ribosomal ITS (internal transcribed spacer: ITS1-5.8S-ITS2) and LSU (large subunit: 28S) sequences combined with morphological characteristics identified three new species from Xinjiang Autonomous Region in Northwest China, which were named T. aurantispora, T. kanasensis, and T. schrenkiana. Similar macromorphological and anatomical characteristics are shared by these new species: arachnoid basidiocarps; byssoid sterile margins; utriform basidia with a clamp connection at the base; the absence of rhizomorphs and cystidia; and slightly thick-walled, subglobose to globose basidiospores. Among these new species, the color of the hymenophoral surface, the size of the basidiospores, and some other features can be used for species delimitation. The new species and closely related species in the phylogenetic tree were discussed, and a key to the identified species of Tomentella from China was provided.

Six New Species of Tomentella (Thelephorales, Basidiomycota) From Tropical Pine Forests in Central Vietnam

“…Approximately 400 names of Tomentella are recorded in the databases Index Fungorum and MycoBank, and 1033 species hypothesis codes of this genus were recorded in UNITE database according to threshold value 1.5% ( Nilsson et al, 2019 ). Approximately 200 species accepted in these databases were from the diversity and taxonomic studies based on basidiocarp specimens in countries worldwide, including 91 species from North America ( Larsen, 1974 ); 41 species from British Isles of United Kingdom ( Wakefield, 1969 ); 48 species from temperate Eurasia ( Kõljalg, 1996 ; Lu et al, 2018a , b ); 13 species from West Africa ( Yorou et al, 2007 , 2011 , 2012a , b ; Yorou, 2008 ; Yorou and Agerer, 2008 ); 8 species from the West India ( Welden, 1968 ; Thind and Rattan, 1971 ); 12 species from Italy ( Yorou and Agerer, 2011a , b ); 3 species from South America ( Kuhar et al, 2016 ); 1 species from South India ( Natarajan and Chandrashekara, 1978 ); 11 species from Canada, Trinidad, Jamaica, Venezuela, Pakistan, and South Africa ( Wakefield, 1966 ); and 46 and 3 species from Northeast and Northwest China, respectively ( Yuan et al, 2020 ; Lu and Yuan, 2021 ). In addition, eight tomentelloid species from Australia and New Zealand have also been reported ( Cunningham, 1963 ; Agerer and Bougher, 2001 ).…”