taxonID	type	description	language	source
A44E85689F01FF87FF18FFD8C690F23E.taxon	description	MycoBank no.: — 846815	en	Zhang, Qiu-Yue, Si, Jing, Li, Hai-Jiao (2023): A new Marasmius species (Agaricales, Marasmiaceae) with sessile basidiomata growing on wood, from Yunnan, China. Phytotaxa 578 (2): 169-179, DOI: 10.11646/phytotaxa.578.2.3, URL: http://dx.doi.org/10.11646/phytotaxa.578.2.3
A44E85689F01FF87FF18FFD8C690F23E.taxon	etymology	Etymology: — yunnanensis (Lat.): refers to the type locality of Yunnan Province, southwest China.	en	Zhang, Qiu-Yue, Si, Jing, Li, Hai-Jiao (2023): A new Marasmius species (Agaricales, Marasmiaceae) with sessile basidiomata growing on wood, from Yunnan, China. Phytotaxa 578 (2): 169-179, DOI: 10.11646/phytotaxa.578.2.3, URL: http://dx.doi.org/10.11646/phytotaxa.578.2.3
A44E85689F01FF87FF18FFD8C690F23E.taxon	distribution	Habitat and distribution: — gregarious on fallen angiosperm branch in tropical forest.	en	Zhang, Qiu-Yue, Si, Jing, Li, Hai-Jiao (2023): A new Marasmius species (Agaricales, Marasmiaceae) with sessile basidiomata growing on wood, from Yunnan, China. Phytotaxa 578 (2): 169-179, DOI: 10.11646/phytotaxa.578.2.3, URL: http://dx.doi.org/10.11646/phytotaxa.578.2.3
A44E85689F01FF87FF18FFD8C690F23E.taxon	diagnosis	Diagnosis: — Differs from other Marasmius species by the tiny basidiomata, sessile or short, inconspicuous stipe, and interwoven and anastomosing to subreticulate lamellae.	en	Zhang, Qiu-Yue, Si, Jing, Li, Hai-Jiao (2023): A new Marasmius species (Agaricales, Marasmiaceae) with sessile basidiomata growing on wood, from Yunnan, China. Phytotaxa 578 (2): 169-179, DOI: 10.11646/phytotaxa.578.2.3, URL: http://dx.doi.org/10.11646/phytotaxa.578.2.3
A44E85689F01FF87FF18FFD8C690F23E.taxon	materials_examined	Type: — CHINA. Yunnan Province: Honghe, Pingbian County, Daweishan Natural Forest Park, on fallen angiosperm branch, 26 June 2019, Dai 19782 (holotype, BJFC 031457).	en	Zhang, Qiu-Yue, Si, Jing, Li, Hai-Jiao (2023): A new Marasmius species (Agaricales, Marasmiaceae) with sessile basidiomata growing on wood, from Yunnan, China. Phytotaxa 578 (2): 169-179, DOI: 10.11646/phytotaxa.578.2.3, URL: http://dx.doi.org/10.11646/phytotaxa.578.2.3
A44E85689F01FF87FF18FFD8C690F23E.taxon	description	Description: — Basidiomata annual, gregarious. Pileus conchoidal, reniform to semicircular, 1.6 – 2.4 mm in diameter, convex to applanate; pileal surface cinnamon to cream when fresh, becoming clay-buff upon drying, dry, dull, striate to sulcate, minutely pruinose; context concolorous with pileal surface, thin. Hymenophore concolorous with pileal surface, lamellate; lamellae adnexed, interwoven and anastomosing to subreticulate, irregularly convex, collarium complete, distinct to indistinct in sessile basidiomata, incomplete, distinct in stipitate basidiomata; lamellae surface powdery. Stipe none, or short and inconspicuous. Odor and taste not distinctive. Basidiospores (7.2 –) 8 – 10 × 5 – 6.2 (– 6.3) μm, L = 8.80 μm, W = 5.83 μm, Q = 1.50 – 1.52 (n = 60 / 2), ellipsoid, hyaline, thin-walled, smooth, with some guttules, IKI –, CB –. Basidia 24 – 30 × 6 – 8 µm, clavate, with a few guttules, 2 (– 4) - spored, sterigmata 1 – 2 μm long; basidioles numerous, lanceolate to clavate. Cheilocystidia abundant, of two types, the first type dominant, 12 – 30 × 8 – 16 µm, as Rotalis - type broom cells, slightly thick-walled, broadly clavate to pyriform, or turbinate, or irregular, with abundant apical diverticula, often wart-like, some short and digitiform, 1 – 2 × 0.5 – 1 μm; the other type, 9 – 32 × 6 – 10 µm, smooth, slightly thick-walled, clavate to pyriform. Pleurocystidia not observed. Pileipellis composed of a hymeniform layer of smooth or Rotalis - type broom cells; terminal cells 19 – 40 × 12 – 20 μm, in shape similar to cheilocystidia, oriented perpendicular to pileal surface. Hymenophoral tramal hyphae subparallel, hyaline, some partly swollen, thin-walled, 3 – 7 μm in diameter. Clamp connections present in all tissues. Trama, stipe medulla and stipitipellis hyphae are slightly dextrinoid.	en	Zhang, Qiu-Yue, Si, Jing, Li, Hai-Jiao (2023): A new Marasmius species (Agaricales, Marasmiaceae) with sessile basidiomata growing on wood, from Yunnan, China. Phytotaxa 578 (2): 169-179, DOI: 10.11646/phytotaxa.578.2.3, URL: http://dx.doi.org/10.11646/phytotaxa.578.2.3
A44E85689F01FF87FF18FFD8C690F23E.taxon	materials_examined	Additional specimen examined (paratype): — CHINA. Yunnan Province: Honghe, Pingbian County, Daweishan Natural Forest Park, on fallen angiosperm branch, 26 June 2019, Dai 19857 (BJFC 031532).	en	Zhang, Qiu-Yue, Si, Jing, Li, Hai-Jiao (2023): A new Marasmius species (Agaricales, Marasmiaceae) with sessile basidiomata growing on wood, from Yunnan, China. Phytotaxa 578 (2): 169-179, DOI: 10.11646/phytotaxa.578.2.3, URL: http://dx.doi.org/10.11646/phytotaxa.578.2.3
