Collybiopsis subumbilicata J.Sung Kim & Y.W. Lim, in Kim, Cho, Park, Park, Kim, Kim & Lim, MycoKeys 88: 95 (2022)
Index Fungorum number: IF 842057; MycoBank number: MB 842057; Facesoffungi number: FoF 17124; Fig. 1
Pileus 10–40 mm diam., plano-convex to plano-concave, subumbilicate, becoming undulate and uplifted in age, grayish orange to brown. Context cream, ca. 1 mm broad. Lamellae subdistant, free to adnexed, white. Stipe 40–65 × 2-4 mm, cylindrical, tomentose, hollow, light brown to dark brown, becoming paler to the apex, covered with pubescence.
Basidiospores 5.5–7.5 × 2.5–3.5 µm, Q = 1.8–2.3, oblong to subcylindrical, smooth, hyaline, non-dextrinoid, with drops. Basidia 18–25.5 × 3.5–5.5 µm, 4-spored, narrowly clavate, cylindrical. Cheilocystidia and Pleurocystidia not observed. Trama hyphae cylindrical, subinflated branched, smooth, non-dextrinoid, 2-8 µm wide. Pileipellis a cutis made up of cylindrical, often incrusted, with heavy annular ornamentation, 5-15 µm wide hyphae. Stipitipellis a cutis of cylindrical, smooth, thin-walled, 2-6 µm wide hyphae. Clamp connections present in all the tissues.
Material examined – CHINA, Hubei Province, Shennongjia National Park, 31°29’N 110°17’W, ca. 2283 m asl, 23 Jun 2023, Jia-Xin Li and Wen-Qiang Yang, ZRL20230148 (HMAS 287967).
GenBank – HMAS 287967: PQ620225 (ITS).
Notes – The morphological and molecular data from the Chinese specimen is consistent with the holotype (Kim et al. 2022). New geographical record from the Shennongjia National Park, China.
Figure 1 – Collybiopsis subumbilicata (HMAS 287967). a Habitat. b Basidiomata. Scale bar: b = 2 cm.