Mycena jingyinga C.C. Chang, C.Y. Chen, W.W. Lin

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 : 79-80

Mycena jingyinga C.C. Chang, C.Y. Chen, W.W. Lin

& H.W. Kao, Taiwania 65(3): 399 (2020) [MB#824043] ( Figs. 1K and 2K )

Korean name: üẹjșḡfflŷ

Pileus convex to bell-shaped, 2-5 mm in diam. Pileus surface virgate, polished, white, grayish brown in the center. Lamellae adnate to subdecurrent, distant, entire, white, 10-13 mm. Stipe central, equal, covered with white pubescence becoming denser in the basal part, grayish white, 8-15 × 0.2-0.3 mm. Hyphal system monomitic, generative hyphae septate without clamp connections, covered with short and simple projections, 2.7-4.0 μm in diam. Pileipellis cells are located in terminal of pileipellis, cylindrical, diverculate, have various forms, 23.3- 37.0× 4.8-6.8 μm. Basidia cylindrical, 4-spored, smooth, hyaline, thin-walled, 28.7-36.9 × 5.9-8.9 μm. Cheilocystidia lageniform to fusoid, smooth, hyaline, thin-walled, rarely diverculate in the apex, 35.6-68.8 × 6.0-10.7 μm. Pleurocystidia absent. Basidiospores cylindrical to ellipsoid, smooth, hyaline, thin-walled, sometimes containing guttules, 8.5-12.6 × 4.9-7.2 μm [Q = 1.73-1.75].

Specimen examined. Korea, Seoul, Seongbuk-gu, Mt. Gaewoon , 37°35 ʹ 45.7 ʺ N, 127°01 ʹ 42.2 ʺ E, 100 m, mixed hardwood forest, occurring gregarious on decayed wood, 26 Jun 2022, M. Cho, KUC20220626-09 (NIBRFG0000 514545), KUC20220626-13 (NIBRFG0000514546), KUC20220626-14 (NIBRFG0000514547) .

Notes - Mycena (Pers.) Roussel is large genus which has several bioluminescent species, and approximately 600 species are distributed worldwide ( Desjardin et al., 2010; Harder et al., 2010; 2013; Robich, 2016; He et al., 2019a). In Korea, 41 Mycena species are reported ( Cho, 2001; 2002; 2003; Han et al., 2010; 2011; Seok et al., 2015; Park et al., 2017; Kwon et al., 2020). Mycena jingyinga is characterized by white, convex to bell-shaped pileus with polished surface, lageniform cheilocystidia, and bioluminescent hyphae in the dark ( Chang et al., 2020). Mycena abramsii was the most closely related species with My. jingyinga in the phylogenetic analysis ( Fig. 10 ). They both have similar morphological characteristics. However, My. abramsii has larger pileus (10-40 mm) with grayish brown to dark brown surface, and pleurocystidia present ( Maas Geesteranus, 1988; Aronsen and Laessøe, 2016). Also, bioluminescence of My. abramsii was not reported although My. jingyinga has bioluminescent characteristics ( Chang et al., 2020). Mycena jingyinga specimens in the original description were all distributed in Taiwan, but due to the high elevation (above 1,000 m) and collection month (Dec to May) ( Chang et al., 2020), the climatic conditions might be similar to our site.

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.