Tomentella Pers. ex Pat., Hyménomyc. Eur. (Paris): 154 (1887)
Index Fungorum number: IF 18650
Notes – The name “Tomentella” was first used as the subgenus of Corticium Pers. (Persoon 1799) and was validated as the generic name by Patouillard (1887). Tomentella is delimited from the other genera mostly by the lack of a special combinations of features, which are present in the other genera (Agerer et al. 2001; Kõljalg 1996). It is characterized by strictly resupinate basidiocarps separable from or adhered to the substrates, a smooth or granulose hymenophore, the presence or absence of rhizomorphs, subicular hyphae with clamp connections or simple septa and ornamented basidiospores (Wakefield 1960; Larsen 1966, 1969, 1970; Kõljalg 1996). Fungi in this genus are cosmopolitan, and the species diversity based on fruitbodies have been extensively taxonomically studied from temperate Eurasia (Kõljalg 1996), North America (Larsen 1974), Iberian Peninsula (Melo et al. 2002), West Africa (Yorou and Agerer 2008; Yorou et al. 2007, 2008, 2011), Australia (Agerer and Bougher 2001), South America (Kuhar et al. 2016) and Asia (Thind and Rattan 1971). In addition, using high throughput sequencing techniques a large number of DNA sequences from environmental samples or plant ectomycorrhizal root tips from different regions of the world have been identified as Tomentella spp. with most of them not matching any known species (Gao et al. 2013; Nouhra et al. 2013). These sequences provide distribution information despite lacking a visible fruitbody. About 400 names have been recorded and around 150 species accepted in the database of Index Fungorum; 80 species were recorded in the Dictionary of the Fungi (10th ed.) (Kirk et al. 2008). However, taxonomic studies based on fruitbodies of Tomentella in China were very few. Based on morphological characteristics and phylogenetic analyses of rDNA ITS sequences (Fig. 111), new species of Tomentella are described and illustrated in this paper. The types (type A–F) of rhizomorphic hyphal organization are important characteristics; we follow the definition of Agerer (1987–2008).
Species