Cruentomycena kedrovaya R.H. Petersen, Kovalenko & O.V. Morozova, Mycotaxon

Cho, Hae Jin, Lee, Hyun, Li, Vladimir, Jargalmaa, Suldbold, Kim, Nam Kyu & Lim, Min-Ji Kim and Young Woon, 2018, Six unrecorded macrofungi from the Royal Tombs (Donggureung and Seooreung) of the Joseon Dynasty and Jongmyo Shrine, Korea, Journal of Species Research 7 (1), pp. 1-8 : 5

Cruentomycena kedrovaya R.H. Petersen, Kovalenko & O.V. Morozova, Mycotaxon 105: 127 (2008)

Hierarchy: Basidiomycota, Agaricales , Mycenaceae

Specimens examined: KOREA, Gyeonggi-do, Guri-si , Donggureung , 37°37 ʹ 06 ʺ N, 127°07 ʹ 58 ʺ E, 11 Aug 2015 , Hae Jin Cho, Young Woon Lim, SFC20150811-45 (GenBank accession No. MF445220 ), on the leaf litter of Quercus spp. and Alnus japonica .

Pileus 7-11 mm, first convex, then applanate with central depression in age, surface glabrous, dull, margin slightly crenate, striate, pastel red (8A5) to brownish red (9C8). Lamellae decurrent, distant, concolorous with pileus, occasionally forked, lamellulae present. Stipe 12- 20 × 0.4-0.8 mm, terete, tough, hollow, slightly darker than pileus.

Basidiospores 8.4-9.2-10.3 × 3.2-3.6-4.0 μm, Q = 2.24- 2.54-2.91, oval, sometimes obclavate, thin-walled, hyaline. Basidia 4-spored, 20.2-22.8-25.8 × 5.2-6.4-7.6 μm, narrowly clavate, contents with small guttules. Cheilocystidia 24.0-29.9-39.9 × 8.2-8.9-9.4 μm, pedicellate, clavate to broadly clavate. Pleurocystidia 32.2-36.0- 40.3 × 6.9-7.2-7.4 μm, rare, pedicellate, clavate. Caulocystidia 32.8-41.4-61.2 × 6.9-7.9-9.0 μm, very thin-walled, broadly clavate, clamped.

Remarks: This study is the first report of genus Cruentomycena in Korea. The key features of this genus are bloody red basidiocarps and absence of pleurocystidia. Petersen et al. (2008) reported that almost all basidiomata of C. kedrovaya were collected on catkins of Alnus in Russia. Korean sample of this species were also collected on the litter layer of Quercus spp. and Alnus japonica . However, pleurocystidia are observed in Korean samples. Further studies for Cruentomycena on the presence or absence of pleurocystidia are needed.