Collybiopsis bambusicola Q. Y. Zhang, J. Si &amp; H. J. Li 2023, sp. nov.
Creators: name: Zhang, Qiu-Yue
name: Zhou, Meng
name: Shi, Feng-Ming
name: Si, Jing
name: Li, Hai-Jiao
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Fungi
Basidiomycota
Agaricomycetes
Agaricales
Marasmiaceae
Collybiopsis
Collybiopsis bambusicola

description: <i>Collybiopsis bambusicola</i> Q.Y. Zhang, J. Si &amp; H.J. Li, <i>sp</i>. <i>nov</i>. (Figures 2–3) MycoBank no.—845655 <b>Etymology</b>:— <i>Bambusicola</i> (Lat.): refers to the species that inhabit dead bamboo. <b>Diagnosis</b>:—This species notably has nearly poroid hymenophores radially arranged from the base of the stipe, oblong ellipsoid basidiospores, and gregarious on dead bamboo. <b>Habitat and distribution</b>:—Gregarious on dead bamboo, at present only discovered from its type locality with three collections, mid-summer. <b>Type</b>:— CHINA. Yunnan Province: Honghe, Jinping County, Fenshuiling Nature Reserve, E 103°28′, N 22°53′, 16 August 2019, <i>Dai 20745</i> (Holotype, BJFC 032412). <b>Description:</b> —Basidiomata annual, gregarious, gelatinous when fresh, brittle when dry. Pilei conchoidal, reniform or round, 2–5 mm broad; pileal surface cream to cinnamon when fresh, becoming brownish gray upon drying, powdery, convex to plane, striate to sulcate; context concolorous with pileal surface, thin, 0.2–1 mm (Figure 2). Hymenophore concolorous with pileal surface, lamellate; lamellae forked and transverse veined to nearly poroid, radially arranged as if a concentric ring centered on the base of the stipe, close with 1–2 series of lamellulae; lamellae surface powdery. Stipe eccentric, yellow near the pileus and to reddish brown near the base, terete, solid, 1–2 × 0.5–1 mm (Figure 2). Odor and taste indistinct. Basidiospores 6–8.3(–9.2) × 3–4.3 μm, L = 7.43 μm, W = 3.89 μm, Q = 1.87–1.95 (n = 60/2), oblong ellipsoid, hyaline, thin-walled, smooth, with one or two guttules, IKI–, CB– (Figure 3a). Basidia 25−32 ×6−8 µm, clavate, 2– spored, sterigmata 3–6 μm long; basidioles narrowly clavate to lanceolate. Pleurocystidia absent. Cheilocystidia 15–27 × 7–12 µm, clavate to pyriform to coralloid, with one or more broad finger-like projections at the apex (Figure 3e). Pileipellis hyphae interwoven, smooth to diverticulate, thin-walled, 2–6 µm in diameter; terminal cells free-form or “antler-shaped”, with broad finger-like projections (Figure 3c). Tramal hyphae subparallel, hyaline, some part swollen, thin-walled, 1.5–4 μm in diameter (Figure 3e). Hyphae in stipe parallel along stipe, sometimes swollen, slightly thickwalled, 4−6 µm in diameter (Figure 3d); Caulocystidia hyaline, thin-walled, smooth, clavate to irregular, 9–14 × 4.5–8 µm (Figure 3b); Clamp connections present in all tissues. <b>Additional specimens examined (paratypes):</b> — CHINA. Yunnan Province: Honghe, Jinping County, Fenshuiling Nature Reserve, E 103°28′, N 22°53′, on dead bamboo, 16 August 2019, <i>Dai 20739</i> (BJFC 032406), <i>Dai 20740</i> (BJFC 032407).
description: Published as part of <i>Zhang, Qiu-Yue, Zhou, Meng, Shi, Feng-Ming, Si, Jing &amp; Li, Hai-Jiao, 2023, Collybiopsis bambusicola sp. nov. in Yunnan Province, Southwestern China, pp. 125-135 in Phytotaxa 578 (1)</i> on pages 129-131, DOI: 10.11646/phytotaxa.578.1.7, http://zenodo.org/record/7517756