taxonID	type	description	language	source
8E4CC86AAB7DFFD4FF77FF64FCA3FAD3.taxon	description	Differs from other similar species (A. villosula, A. auricula-judae and A. americana) by presence of medulla, short abhymenial hairs and smaller basidiospores 11 – 13 × 4 – 5 µm. Type — CHINA. Heilongjiang Province: Mudanjiang, Hailin Country, on fallen trunk of Quercus, 2 August 2014, Dai 13765 (holotype, BJFC!) Etymology — heimuer (Lat.) referring to the Chinese name “ Heimuer ”, a highly prized Auricularia fungus in Chinese folklore. Basidiomata — Gelatinous when fresh, solitary or caespitose, sessible or substipitate, auriculiform to petaloid, with undulate margin, when mature up to 12 cm broad, 0.8 – 1.5 mm thick, 0.1 – 0.25 mm thick when dry; upper surface pilose with folds, fawn to reddish brown when fresh and greyish brown when dry; lower surface venose with few folds, claybuff when fresh and vinaceous gray to dark gray when dry. Internal features — Medulla present; abhymenial hairs, 50 – 150 × 4 – 6.5 µm, irregular, hyaline, thick-walled with a narrow lumen, apically acute or obtuse, usually single, sometimes tufted; hyphae bearing clamp connections; basidia clavate, transversely 3 - septate, with oil guttules, sterigmata rarely observed, 40 – 67 × 3.0 – 6.5 µm. Spores — Basidiospores allantoid, hyaline, thin-walled, smooth, usually bearing one or two large guttules, IKI –, CB –, 11 – 13 (– 13.1) × 4 – 5 (– 5.1) µm, L = 12.0 µm, W = 4.71 µm, Q = 2.43 – 2.74 (n = 120 / 4). Additional specimens examined — CHINA. Heilongjiang Province: Mudanjiang, Wenchun County, on fallen trunk of Quercus, 12 August 2009, Cui 7105 (BJFC!); Yabulihongxing Farm, on fallen trunk of Quercus, 12 September 2013, Dai 13503 (BJFC!); the Great Hinggan Mts., Hongtu Forest Farm, on fallen trunk of Quercus, 25 July 2013, Dai 13648 (BJFC!), Dai 13649 (BJFC!); Nenjiang Country, Duobaoshan, on fallen angiosperm trunk, 15 August 2009, Cui 7325 (BJFC!). Jilin Province: Hunchun, Taiyang Mountain, on fallen trunk of Quercus, 25 July 2013, Dai 13647 (BJFC!); Hadamen County, on fallen trunk of Quercus, 7 August 2009, Cui 7098 (BJFC!), Cui 7100 (BJFC!), Cui 7101 (BJFC!). Shanxi Province: Lingchuan County, on fallen angiosperm trunk, 9 November 2009, Cui 8644 (BJFC!). Tianjin: Ji County, on fallen trunk of Quercus, 1 August 2009, Cui 7051 (BJFC!). Ningxia Autonomous Region: Liupan Mountain, on fallen angiosperm trunk, 11 July 2010, Dai 11939 (BJFC!). Inner Mongolia: Arshan, on fallen trunk, 9 August 1991, Sun 967 (HMAS!). RUSSIA. Primorsky Territory: Sikhote-Alin Nature Reserve, vicinities of Ust’ - Serebryany, on fallen trunk, 4 September 1996, Morozova 296433 (LE!). Khankaisky District: Novo-Kachalinsk, on a fallen trunk of Quercus, 26 July 1996, Leley 296423 (LE!). Republic of Buryatia: Kabansky District, on a fallen trunk of Populus, 9 August 1998, Morozova 262806 (LE!).	en	Wu, Fang, Yuan, Yuan, Malysheva, Vera F., Du, Ping, Dai, Yu-Cheng (2014): Species clarification of the most important and cultivated Auricularia mushroom “ Heimuer ”: evidence from morphological and molecular data. Phytotaxa 186 (5): 241-253, DOI: 10.11646/phytotaxa.186.5.1, URL: http://dx.doi.org/10.11646/phytotaxa.186.5.1
