Morphological characteristics and phylogenetic analyses revealed two additional taxa in Cyathus (Agaricales, Basidiomycota) Author Duan, Zi-Yan 0000-0003-2673-8890 Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province, Southwest Forestry University, Kunming 650224, P. R. China & fungiziyand @ 163. com; https: // orcid. org / 0000 - 0003 - 2673 - 8890 Author Yang, Xin 0009-0009-7755-0581 Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province, Southwest Forestry University, Kunming 650224, P. R. China & Fungixiny @ 163. com; https: // orcid. org / 0009 - 0009 - 7755 - 0581 Author Liu, Chao-Mao 0000-0002-9548-9683 Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province, Southwest Forestry University, Kunming 650224, P. R. China & lcm 1987 swkx @ 163. com; https: // orcid. org / 0000 - 0002 - 9548 - 9683 Author Zhao, Chang-Lin 0000-0002-8668-1075 Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province, Southwest Forestry University, Kunming 650224, P. R. China & Yunnan Key Laboratory of Gastrodia and Fungal Symbiotic Biology, Zhaotong University, 657000, P. R. China & Yunnan Key Laboratory for Fungal Diversity and Green Development, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, P. R. China & fungichanglinz @ 163. com; https: // orcid. org / 0000 - 0002 - 8668 - 1075 text Phytotaxa 2023 2023-05-19 598 1 1 20 http://dx.doi.org/10.11646/phytotaxa.598.1.1 journal article 10.11646/phytotaxa.598.1.1 1179-3163 7958744 Cyathus asiaticus Z.Y. Duan & C.L. Zhao , sp. nov. Figs. 3–6 MycoBank no.: MB 845559 Etymology:— asiaticus (Lat.) referring to the provenance (Asian) of the type specimen. Holotype :— CHINA . Yunnan Province , Wenshan , Pingba Town , Huguangqing Village , E 104°33′ , N 23°60′ , on fallen branch of Pinus yunnanensis Franch , 11 August 2020 , CLZhao 19445 ( SWFC ). Fruiting body :— obconical, campanulate to cupulate, 5–10 mm in height, 4–6 mm in width at the upper part, without expanding at the top or tapering abruptly at the base; the base usually attached to the substrate by a conspicuous emplacement, yellowish brown (5E4). young fruit bodies clavate, covered by hairs aggregated into tomentum or shaggy clusters, pale yellow (4A3) to yellowish brown (5E4). exoperidium yellowish to yellowish brown (5E4), shaggy or hirsute, external wall non-striate, covered with pale yellow (4A3), irregular and flexible tufts of hair; hair hyphae with the clamp connections, yellowish, thick-walled (up to 0.5–2 μm thick), 2.5–11.5 µm in diameter; endoperidium concolorous with the exoperidium, non-shiny, smooth to faintly striate, with 0.5–0.7 mm between groves. mouth smooth. peridium walls consist of three different layers: (1) outer wall layer: hyphal system dimitic, CB–, IKI–, tissues unchanged in KOH; generative hyphae with clamp connections, yellowish brown, slight thick-walled, frequently branched, 1.5–4.5 µm in diameter; skeletal hyphae yellowish brown, thick-walled, unbranched, 2–4 µm in diameter; (2) inner wall layer: hyphal system dimitic, CB–, IKI–, tissues unchanged in KOH; generative hyphae with clamp connections, yellowish-brown, slight thick-walled, frequently branched, 1.5–4.5 µm in diameter; skeletal hyphae yellowish brown, thick-walled, unbranched, 1–3 µm in diameter; (3) pseudoparenchymatous layer. Peridioles : — shiny, regular to irregular, elliptical to broadly ellipsoid, silver gray to black, surface irregular, wrinkled, tunica present, slightly thin, dark grey (8F1) to brownish gray (7F2). cortex single-layered, 1.5–2.5 × 1.5–2 mm . funicular cord present, funiculus generative hyphae with clamp connections, thick-walled, branched, yellowish, 1–4.5 µm in diameter. hyphal system monomitic, generative hyphae with clamp connections, colorless, thick-walled, branched, with oil drops inside, 3–7 µm in diameter, CB–, IKI–, tissues unchanged in KOH. Basidiospores : — 3.5–10.5 × 3–5.5 µm, L = 7.0 µm, W = 4.4 µm, Q = 1.6 (n = 90/2), broadly ellipsoid, elliptical, subglobose, ovoid, broadly ovate, some irregular, colorless, smooth, slight thick-walled (up to 0.5–1 μm thick), CB–, IKI–, some basidiospores with the inconspicuous apiculus. Basidia not observed. Additional specimen examined : — CHINA , Yunnan Province , Wenshan, Pingba Town, Huguangqing Village, E 104°33′ , N 23°60′ , on fallen branch of angiosperm, 12 Aug 2020 , CLZhao 19847 (SWFC).