Dentocorticium ussuricum (Parmasto) M.J. Larsen & Gilb., Norw. Jl Bot. 21(3): 226, 1974.
MycoBank number — MB 312868
We studied the type material of D. ussuricum and obtained ITS sequence of an authentic material conforming to the type, to deduce the relationships of the type of the genus. A megablast search of GenBank nucleotide database at NCBI (as of 16 November 2015) using the new ITS showed that the best hits were isolates of Dentocorticium sulphurellum (Peck) M.J. Larsen & Gilb. with 95 – 96 % identity over 98 % query coverage, followed by isolates of Trametes Fr. spp. According to Binder et al. (2013), Trametes and Dentocorticium sulphurellum reside in the core polyporoid clade (Polyporaceae, Polyporales). Here, the position of generic type D. ussuricum within the family Polyporaceae, and congeneric relationship of D. sulphurellum with D. ussuricum are established.
Material examined — RUSSIA, Primorsk, Insula Petrova, on Actinidia arguta, 1 September 1961, leg. A. Raitviir (TAA 42424, holoype). CHINA, Jilin Province, Antu County, Erdaobaihe, south of Erdaocun town, ca. 30 km from Erdaocun towards Changbaishan Mountain and Lake; forest mainly with Abies, Picea, Larix, Acer spp., also Betula, Populus, Tilia amurensis, and Pinus; 42.205 Lat., 128.165 Long., elev. ca. 1100 m; on hanging branch of cf. Acer, 3 cm in diam.; 11 September 2011; Ghobad-Nejhad 2465 (Ghobad-Nejhad ref. collection, and BJFC).