Entoloma subtenuicystidiatum Xiao Lan He & T.H. Li

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 : 74-76

Entoloma subtenuicystidiatum Xiao Lan He & T.H. Li ,

Mycological Progress 11: 921 (2012) [MB#563509] ( Figs. 1F and 2F )

Korean name: ŭƞq1fflŷďNjffi

Pileus convex to plane, center depressed when mature, margin straight, even, 8-12 mm in diam. Pileus surface smooth, lightly virgate, yellowish brown, reddish brown in the center. Lamellae adnate, subdistant. Stipe central, equal, light brown, 20-25 × 0.7-1.2 mm. Hyphal system monomitic, simple septate, unbranched, with few clamp connections, thin-walled, hyaline, 3.9-7.4 μm. Basidia subclavate to cylindrical, 4-spored, rarely 2-spored, smooth, thin-walled, hyaline, without a clamp connection, some bearing guttules, 24.3-31.3 × 7.9-11.0 μm. Cheilocystidia cylindrical, smooth, thin-walled, without a clamp connection, 25.6-33.3 × 7.2-8.2 μm. Pleurocystidia absent. Basidiospores hexagonal or heptagona, smooth, thick-walled, pale yellow, bearing a guttule, 9.1-10.9 × 6.3-8.2 μm [Q = 1.33-1.44].

Specimen examined. Korea, Daejeon, Yuseong-gu , Korea Research Institute of Bioscience and Biotechnology ( KRIBB), 36°22 ʹ 36.0 ʺ N, 127°21 ʹ 30.9 ʺ E, 53 m, occurring scattered on a lawn, 24 Jun 2014, Y. W. Lim, SFC2014 0624-04 (NIBRFG0000136737) .

Notes - SFC20140624-04 is morphologically similar to the original description ( He et al., 2012), but the original description has longer cheilocystidia (40-70 × 7-10 μm) and bigger basidiospores (9.5-13 × 7.5-9 μm) than our specimen ( He et al., 2012). Entoloma subtenuicystidiatum resembles E. tenuicystidiatum morphologically, but E. tenuicystidiatum has pale brown to brown pileus and larger basidiospores (10-15 × 8-10 μm) ( Noordeloos and Gates, 2009). Entoloma subtenuicystidiatum occurred on a lawn, which accords with the original description ( He et al., 2012). However, these specimens were reported in Southern China, Jiangxi, and Fuzhou ( He et al., 2012), so this study is the first report of E. subtenuicystidiatum in the region above 30 degrees north latitude.

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).