Morphological and molecular identification of three new species of Tomentella from Finland

Abstract

Three new species of Tomentella (Thelephorales) from Finland, T. globosa, T. lammiensis, and T. longisterigmata, are described and illustrated with morphological characteristics and nuc rDNA ITS1-5.8S-ITS2 sequences. T. globosa is characterized by mucedinoid, pale to dark brown basidiocarps adherent to the substrate, generative hyphae with clamps and rarely with simple septa, and echinulate, globose basidiospores (echinuli up to 1.5 μm long). T. lammiensis is characterized by mucedinoid, oxide yellow to golden brown basidiocarps adherent to the substrate, generative hyphae with clamps and rarely with simple septa, and echinulate, ellipsoid, triangular, or lobbed basidiospores (echinuli up to 2 μm long). T. longisterigmata is characterized by mucedinoid, dark brown to chestnut basidiocarps separable from the substrate, generative hyphae clamped and rarely with simple septa, the long basidial sterigmata (7-11 μm long), and echinulate, globose basidiospores (echinuli up to 2 μm long). An absence of rhizomorphs and cystidia is their common morphological feature. Molecular analyses by maximum likelihood, maximum parsimony, and Bayesian analyses confirm the phylogenetic position of these three new species. The discriminating characters of these new species and their closely related species are discussed in this study, and a key to the species from Finland is provided.

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

“…T. schrenkiana also shows similar anatomical features to T. globospora, T. pertenuis, and T. segregata, including basidiocarps adherent to the substrate and the absence of rhizomorphs and cystidia. However, the mucedinoid basidiocarps, farinaceous sterile margin, utriform basidia, and slightly larger basidiospores with longer echinuli (L = 7.05 µm, W = 6.35 µm, echinuli up to 1.5 µm) [51] of T. globospora are very different from T. schrenkiana. In comparison with T. schrenkiana, T. segregata can be distinguished in producing discontinuous basidiocarps, a farinaceous sterile margin, and larger basidiospores with isolated and longer echinuli.…”

“…Species in the clade with moderate support or high support present unique features. Species in clade 1 have basidiocarps with similar color; species in clade These species share some similar characteristics: clamped hyphal system, globose to subglobose basidiospores, and the absence of rhizomorphs and cystidia [3,11] except for the ellipsoid, triangular, or lobed basidiospores of T. lammiensis and T. stipitata [11,51]. T. aurantispora also presents some other similar morphological characteristics with T. changbaiensis and T. megaspora: byssoid sterile margin, short and inflated subhymenial hyphal cell, and utriform basidia.…”

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

“…Special color terms followed Kornerup and Wanscher (1981) for the macromorphological description. The microscopic procedure follows Lu et al (2018b) with some minor amendments. Cyanophilous or acyanophilous reactions were assessed using Cotton Blue.…”

“…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 ).…”