Clitolyophyllum umbilicatum J. Z. Xu & Yu Li

Clitolyophyllum umbilicatum J. Z. Xu & Yu Li, Journal of Fungi 7 (12, no. 1101): 9 (2021) Fig. 5 Description. Basidiocarps omphalioid or clitocyboid. Pileus 30–50 mm in diam., deeply depressed, pale orange to greyish-brown (6 A 3-6 D 3), margin incurved with white appendages, slightly wavy with age. Lamellae decurrent, moderately crowded, thin, bluish-grey to grey (20 D 2-19 E 1), with numerous tiers of lamellulae, edges entire. Stipe 40–60 mm long and 5–8 mm wide, central, cylindrical or slightly compressed, equal or slightly tapering towards the apex, surface brownish-grey to dark brown (6 E 2-6 F 5), radially striate. Context thin, fleshy. Basidiospores [30 / 4 / 3] (4.5) 4.6–6.3 – 8.2 (8.6) x (3.1) 3.4–4.3 – 5.3 (5.8) μm, Q = (1.17) 1.18–1.89 (2.10), Qm = 1.50, subglobose-ellipsoid, smooth, inamyloid, cyanophilic. Basidia (20.6) 22.6–25.6 – 28.4 (28.6) x 5.4–7.0 – 8.7 (8.8) μm, narrowly clavate or clavate, 2–4 spores, with siderophilous granulations. Hymenophoral trama regular, hyphae 2.5–16.7 μm wide. Hymenial cystidia not observed. Pileipellis a cutis of subparallel, dense, cylindrical hyphae, hyphae 2.6–16.5 μm wide, thin-walled, irregular. Stipitipellis made up of regularly parallel, hyphae 3.3–17.5 μm wide. Clamp connections present. Habitat. Scattered on soil under mixed forests Known distribution. The species is known to be distributed in China. Specimens examined. China, Jilin Province, Yanbian Korean Autonomous Prefecture, Antu County, Red Pine King Scenic Spot, 31 July 2022, J. Z. Xu HMJU 5573. Comments. This species was originally described from Gansu Province and is characterised by the omphalioid or clitocyboid habit, umbilicate pileus, central stipe, smooth, inamyloid spores and subregular pileipellis (Xu et al. 2021).