Laccaria acanthospora A. W. Wilson & G. M. Muell.
Year: 2026
Type: article
Abstract: Laccaria acanthospora A. W. Wilson & G. M. Muell., in Wilson, Hosaka, Perry & Mueller, Mycoscience 54 (6): 412 (2013) Figs 8, 9, 10 j – l Chinese name. 刺孢蜡蘑 (Ci Bao La Mo). Description. Basidiomata small. Pileus 4–15 mm diameter, plano-concave to convex, with the center depressed to umbilicate, surface glabrous, at times weakly fibrillose, the center is moderate orange (# c 17 c 55) and the edges are soft orange (# e 99 b 60), margin striate, subhemispherical; pileus context thin, 1–2 mm. Lamellae adnate to adnate with decurrent tooth, broad, distant, lamella edge even or entire; lamellulae in 2–4 tiers, pale orange color than pileus (# ffceb 3). Stipe 27–45 × 1–3 mm, cylindrical, fistulose, central or eccentric, fibrillose striate, base orange-pink (# fac 794) with some brown streaks (# 874 a 2 b), transitioning to light orange (# e 99 b 60); stipe context fistulose, soft orange (# e 99 b 60), subbulbous at the base. Odor and taste not observed. Basidia 35–50 × 9–15 μm, av. 38 ± 4.4 × 13 ± 1.6 μm, clavate, mostly 4 - spored, rarely 2 - spored; sterigmata 4–10 × 2–4 μm, av. 6.5 ± 1.2 × 2.7 ± 0.4 μm. Basidiospores (excluding ornamentation) [65 / 1 / 1] (6.6 –) 7.1–10.8 (– 11.1) × (6.4 –) 7.0–10.6 (– 10.9) μm, av. 9.1 ± 0.8 × 9.1 ± 0.8 μm, Q m = 1.0–1.1, Q av. = 1.0 ± 0.02, broadly ellipsoid to globose, strongly echinate; spines 2–6 × 1–2 μm, crowded, with acute hylar appendage. Cheilocystidia measuring 26–50 × 2–11 μm, av. 37.1 ± 7.7 × 6.5 ± 2.8 μm, polymorphic, predominantly subclavate to narrowly clavate or hyphoid in form, flexuose and irregular, with thin hyaline walls. Pleurocystidia 13–23 × 2–8 μm, av. 17 ± 2.8 × 5 ± 1.1 μm, morphologically distinct from cheilocystidia, polymorphic, subclavate to narrowly clavate or hyphoid in form, flexuous or mucronate, occasionally exhibiting branching, with thin hyaline walls. Lamellar trama parallel to interwoven, composed of cylindrical hyphae 30–100 μm in diameter. Subhymenium 13–27 μm thick, tightly interwoven, fusiform or irregular cells, 3–7 × 2–5 μm. Pileipellis is a cutis composed of cylindrical hyphae 3–11 μm in diameter, interwoven and repent, with frequent branches. Stipitipellis composed of interwoven, cylindrical, clamped hyphae, 3–12 μm in diameter. Caulocystidia were not observed. Clamp connection present at some septa in pileipellis, lamellae, and stipitipellis. Habitat and phenology. Scattered, gregarious, or caespitose on the edges of ditches, in grasslands, on sandy soils, and beside woods. Additional specimens examined. China • Yunnan Province, Dali Autonomous Prefecture, Shaxi Town, Shibao Mountain, 26°39'55.70"N, 100°24'32.02"E, ele. 2,500 m., 8 September 2024, G. Zhao, 2024090827 (HKAS 147006). Notes. Following BLAST searches of the NCBI GenBank database, the ITS and LSU sequences of the collected specimen (HKAS 147006) showed the highest similarity to L. acanthospora (99.63 % sequence identity with specimen AWW 485 for ITS and 99.88 % with specimen HKAS 45998 for LSU), and its morphological characteristics are consistent with the original description of L. acanthospora from Xizang by Wilson et al. (2013). Based on combined morphological and phylogenetic analyses, this specimen was identified as L. acanthospora. This species was originally described from specimens collected in Xizang, southwestern China, and this study represents a new collection record from Dali, Yunnan Province.
Institution: Dali University
Language: English
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7204447768