Mycena yuezhuoi Z.W. Liu, Y.P. Ge & Q. Na

Cho, Minseo, Kwon, Sun Lul, Jang, Seokyoon, Yoo, Yeonjae, Lee, Sang Hyun, Kwon, Dae Young, Kim, Changmu, Lim, Young Woon & Kim, Jae-Jin, 2024, Notes of 15 unrecorded macrofungi in Korea, Journal of Species Research 13 (1), pp. 67-88 : 80

Mycena yuezhuoi Z.W. Liu, Y.P. Ge & Q. Na ,

Phytotaxa 511(2): 153 (2021) [MB#838747]

( Figs. 1L and 2L )

Korean name: flųjșḡfflŷ

Pileus bell-shaped, decurved, 8-12 mm in diam. Pileus surface smooth, striate in the margin, light reddish brown in the center, becoming purple to the margin. Lamellae adnate, subdistant. Stipe central, equal, smooth, pale brown, 25-35 × 1-2 mm. Hyphal system monomitic, generative hyphae simple septate, rarely branched, without clamp connections, thin-walled, hyaline, 3.2-7.8 μm. Basidia cylindrical to subclavate, 4-spored, smooth, thin-walled, hyaline, with a clamp connection, 15.9-24.8 × 3.7-6.1 μm. Cheilocystidia rare, cylindrical to subclavate, 24.9-39.7 × 6.4-8.5 μm. Pleurocystidia absent. Basidiospores cylindrical, smooth, thin-walled, hyaline, sometimes bearing a guttule, 5.6-8.3 × 3.1-4.2 μm [Q = 1.81-1.98].

Specimen examined. Korea, Gyeongsangbuk-do, Cheongsong-gun, Juwangsan National Park, 36°24 ʹ 02.4 ʺ N, 127° 25 ʹ 58.8 ʺ E, 346 m, coniferous forest, occurring gregarious on ground covered with leaf litter near Yongchu Falls , 31 Jul 2019, S . Jang and S. L . Kwon , KUC20190731-37 ( NIBR FG0000506126 ); 36°23 ʹ 56.6 ʺ N, 129°11 ʹ 41.5 ʺ E, 828 m, hardwood forest, occurring on decayed Oriental oak ( Quercus variabilis ) trunk near Gamebong, 11 Oct 2019, S . Jang and S. L . Kwon, KUC20191011-27 A ( NIBRFG 0000506192 ) .

Notes - Mycena yuezhuoi is classified as My. pura complex in Mycena sect. Calodontes and is characterized by lilac to purple and bell-shaped pileus less than 35 mm in diam ( Liu et al., 2021; 2022). Mycena pearsoniana is grouped with My. yuezhuoi in the phylogenetic analysis ( Fig. 10 ). Mycena pearsoniana was previously reported in Juwangsan National Park ( Kwon et al., 2020), which shows same habitat with KUC20190731-37 and KUC20191011-27A. Mycena pearsoniana differs from My. yuezhuoi by having a white to light brown pileus, clavate basidia, and wider basidiospores 5.5-9.1× 3.5-4.8 μm ( Singer, 1958; Maas Geesteranus, 1992; Kwon et al., 2020).

Figures

Fig. 1. Macro-morphological characteristics of fifteen unrecorded macrofungi in Korea. A. Agaricus thiersii; B. Baorangia alexandri; C. Boletellus putuoensis; D. Entoloma bulakhae; E. Entoloma pygmaeopapillatum; F. Entoloma subtenuicystidiatum; G. Gerronema kuruvense; H. Hyphoderma nudicephalum; I. Hyphoderma tenue; J. Macrolepiota subcitrophylla; K. Mycena jingyinga; L. Mycena yuezhuoi; M. Ophiocordyceps vespulae; N. Scytinostroma acystidiatum; O. Steccherinum straminellum (scale bar=10 mm for A-D, G-J, M-O; 5 mm for E, F, L; and 2.5 mm for K).

Fig. 2. Micro-morphological characteristics of fifteen unrecorded macrofungi in Korea. A. Agaricus thiersii; B. Baorangia alexandri; C. Boletellus putuoensis; D. Entoloma bulakhae; E. Entoloma pygmaeopapillatum; F. Entoloma subtenuicystidiatum; G. Gerronema kuruvense; H. Hyphoderma nudicephalum; I. Hyphoderma tenue; J. Macrolepiota subcitrophylla; K. Mycena jingyinga; L. Mycena yuezhuoi; M. Ophiocordyceps vespulae; N. Scytinostroma acystidiatum; O. Steccherinum straminellum(scale bars=10μm).

Fig. 10. The phylogenetic tree of Mycena jingyinga (KUC20220626-09, KUC20220626-13, and KUC20220626-14) and My. yuezhuoi (KUC20190731-37 and KUC20191011-27A). The tree was constructed based on ITS gene datasets of the genus Mycena. Xeromphalina campanella was used as an outgroup. The newly generated sequence is shown in blue and bold. Bootstrap support values more than 70 are shown.