taxonID	type	description	language	source
114987E5FFA7571471BAFF7C20C9FC7A.taxon	diagnosis	Diagnosis: — Gerronema confusum is similar to G. atrialbum and G. wildpretii in the appearance of basidiomata, however it can be distinguished from G. wildpretii in having larger basidiospores (7.5 – 12.5 × 5 – 10 μm) and the absence of clamp connections in all tissues, while from G. atrialbum in having shorter stipe (5 – 7 cm long) and abundant cheilocystidia. ITS-phylogeny supported G. confusum as a distinct species. Etymology: — ‘ confusum’, refers to its confusingly similar macro-morphology with G. wildpretii. Holotype: — CHINA. Shanxi Province, Yuncheng City, Xia County, 35 ° 0 ʹ 24 ʺN, 111 ° 31 ʹ 24 ʺE, elev. 1020 m, 06 October 2020, Hao-Yu Fu, MNM 101 (BJTC FM 1592). Description: — Basidiomata omphalinoid, medium-sized. Pileus 55 – 65 mm broad, sometimes umbilicate, but predominantly infundibuliform to deeply infundibuliform; ground color gray white (# c 0 c 0 c 0), covered with adpressed grayish brown (# 7 d 371 f) to brown (# 52361 b) fibrils and dark brown granulose (# 3 f 2915) all over; margin almost straight to rather reflexed, undulate, with some white split. Lamellae decurrent, white (# d 8 eaf 3), 3.5 – 4.5 mm broad, with lamelluale of 2 – 3 tiers, sometimes with the cross veins, edge entire, concolorous. Stipe 55 – 70 × 9 – 14 mm, cylindrical, equal or slightly broader towards the base, hollow; surface gray white to concolorous with the pileus, granulose toward apex, granulose dark brown (# 3 f 2915). Context thin, white (# aac 0 da). Odour and taste indistinct. Basidiospores 7.5 – 12.5 × 5 – 10 μm; Q (L / I) = 1 – 2 (Qm = 1.47) (n = 60), ellipsoid to subglobose, thin-walled, smooth, inamyloid, hyaline, with a prominent apiculus, often with a large oil drop at the centre. Basidia 37.5 – 62.5 × 5 – 7.5 μm, clavate, sometimes fusiform, thin-walled, 1 – 2 - spored; sterigmata up to 10 μm long. Cheilocystidia abundant, 42.5 – 62.5 × 5 – 12.5 μm, hyaline, thin-walled, subcylindrical to cylindrical. Pleurocystidia absent. Pileipellis a cutis disrupted by clusters of erect or semi-erect pileocystidia; hyphae hyaline or often with a light brown plasmatic pigment, thin-walled, with slightly swollen terminal elements. Pileocystidia 62.5 – 85 × 7.5 – 10 μm, flexuose, clavate or subclavate, with a light brown plasmatic pigment, thin-walled. Stipitipellis a cutis disrupted by caulocystidia and occasional ascending or erect hyphae with inflated terminal hyphae, hyaline or with a light brown plasmatic pigment. Caulocystidia 42.5 – 62.5 × 5 – 8.75 μm, with a light brown plasmatic pigment, cylindrical, fusoid, clavate or sometimes irregular in shape, thin-walled. Clamp connections absent. Habitat: — Solitary, growing on buried wood in the broad-leaved forests dominated by Quercus sp. Known distribution: — Shanxi, CHINA Additional specimens examined: — CHINA. Shanxi Province, Yuncheng City, Xia County, 35 ° 4 ʹ 46 ʺN, 111 ° 23 ʹ 43 ʺE, elev. 1000 m, 04 October 2020, Ning Mao, MNM 039 (BJTC FM 1624).	en	Zhao, Tao-Yu, Fan, Li (2022): Gerronema confusum (Porotheleaceae), a new species from North China. Phytotaxa 550 (2): 186-194, DOI: 10.11646/phytotaxa.550.2.7
