Notes of 15 unrecorded macrofungi in Korea Author Cho, Minseo Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Author Kwon, Sun Lul BK 21 FOUR R & E Center for Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Author Jang, Seokyoon Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, & Forest Industrial Materials Division, National Institute of Forest Science, Seoul 02455, Republic of Korea Author Yoo, Yeonjae Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Author Lee, Sang Hyun Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Author Kwon, Dae Young Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Author Kim, Changmu Species Diversity Research Division, National Institute of Biological Resources, Incheon 22689, Republic of Korea Author Lim, Young Woon School of Biological Sciences and Institute of Microbiology, Seoul National University, Seoul 08826, Republic of Korea ywlim@snu.ac.kr Author Kim, Jae-Jin Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, ywlim@snu.ac.kr text Journal of Species Research 2024 13 1 67 88 journal article 10.12651/JSR.2024.13.1.067 2713-8615 13161759 Scytinostroma acystidiatum Q.Y. Zhang, L.S. Bian & Q. Chen, Frontiers in Cellular and Infection Microbiology 564(1): 13 (2023) [MB#848524] ( Figs. 1N and 2N ) Korean name: ĕƚǵ"űŀġfflŷ Basidiome annual, resupinate, effused, thin. Hymenial surface coriaceous, smooth, slightly cracked, pale yellow, margin white. Hyphal system dimitic, generative hyphae simple septate, rarely branched, without clamp connections, thin-walled, hyaline, 1.4-2.1 μm. Skeletal hyphae aseptate, frequently branched, interwoven, without clamp connections, thick-walled, hyaline, 1.9-2.8 μm. Basidia subclavate to cylindrical, 4-spored, smooth, thin-walled, hyaline, with a basal clamp connection, 10.5-19.0× 2.6- 4.5 μm. Cystidia rare, cylindrical, slightly bent, 20.9- 26.3 × 4.3-5.1 μm. Basidiospores narrowly ellipsoid to cylindrical, smooth, thin-walled, hyaline, 3.5-5.1 × 2.0- 2.8 μm [Q = 1.75-1.82]. Specimen examined. Korea , Gyeongsangbuk-do , Cheongsong-gun , Juwangsan National Park , 36°26 ʹ 26.0 ʺ N , 129° 08 ʹ 17.6 ʺ E , 346 m , mixed hardwood forest, occurring on hardwood branch near Dalgi Falls , 20 Jun 2019 , S. Jang and S. L. Kwon , KUC20190620-28 ( NIBRFG0000506 080 ) . Notes - Scytinostroma Donk is a white-rot corticioid fungus, and 36 species have been reported worldwide ( Donk, 1956 ; Nakasone, 2008 ; Wang et al. , 2020 ; Zhang et al. , 2023 ). Two species have been reported in Korea ( Lee et al. , 2004 ; Park et al. , 2017 ). Scytinostroma acystidiatum is characterized by resupinate and coriaceous pale yellow basidiome, and dimitic hyphal system ( Zhang et al. , 2023 ). Morphologically, KUC20190620-28 has smaller basidiospores compared to original description, (4.5-)4.7- 7 × (3-)3.5-4.7(-5) μm ( Zhang et al. , 2023 ). Also, cystidia were not described in the original description ( Zhang et al. , 2023 ), but few cystidia was observed in our specimen. In the phylogenetic analysis, Sc. renisporum is grouped with Sc. acystidiatum with high bootstrap value ( Fig. 12 ). However, Sc. renisporum has membranaceous basidiome and larger cystidia, 20-35 × 6-10 μm ( Boidin and Lanquetin, 1987 ). Furthermore, KUC 20121019 -32 was previously reported as Lachnocladiaceae sp. 1 in Jang et al. (2016b) , and it was figured out as Sc. acystidiatum in this study.