Gymnopus violaceigregarius A.B. Qasmi, A. Izhar, & Khalid, 2025
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publication ID |
https://doi.org/10.11646/phytotaxa.715.3.4 |
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persistent identifier |
https://treatment.plazi.org/id/0067E73B-FFCA-967C-D283-46942C3EF905 |
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treatment provided by |
Felipe |
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scientific name |
Gymnopus violaceigregarius A.B. Qasmi, A. Izhar, & Khalid |
| status |
sp. nov. |
Gymnopus violaceigregarius A.B. Qasmi, A. Izhar, & Khalid sp. nov. ( Figs. 2 View FIGURE 2 , 3 View FIGURE 3 )
MycoBank:—MB849043
Etymology:—The etymology is from the Latin ‘ violaceus ’ (= deep violet colour) and ‘ gregarious ’ (= clustered together). In terms of the new species producing clustered basidiomata, but not united or matted together”
Diagnosis:— Gymnopus violaceigregarius can be easily differentiated from closely-related species Gymnopus brassicolens due to its light red to reddish yellow pileus at the center and pink towards the margins white to reddish yellow lamellae, multiple shaped cheilocystidia and pileipellis simple diverticulate with several lateral projections.
Holotype:— PAKISTAN. Khyber Pakhtunkhwa, Dir Upper District, Kumrat Valley, among the grass, on soil under Abies pindrow , ( 35°34′56″N 72°10′10″E), 2232 m, a.s.l., August 01, 2022, Aiman Izhar & Abdul Nasir Khalid, KUM _48, Holotype (LAH37854).
Gene sequence ex-holotype:—GenBank OR063896 (nrITS), OR063898 (for LSU).
Description:— Basidiomata 4.5–9 cm, fleshy, small to medium-sized, gregarious, terrestrial. Pileus 2.5–5 cm in diam., glabrous, dry, light red (Hue 2.5 YR, 6/8) to reddish yellow (Hue 5 YR, 6/8) at the center, pink (Hue 5 YR, 8/4) towards margins, convex to plano-convex when young, then applanate with rounded to shallowly depressed center, uplifted to revolute, or undulating margins, dry and dull, rugulose surface. Context whitish, thin. Lamellae 0.2–0.3 cm wide, white (Hue 7.5 YR, 8/1) to reddish yellow (Hue 7.5 YR, 7/6), adnate to emarginate ventricose, attached with a small tooth, broad, thick, sub distant, edges even to crenate, 1–2 series of lamellulae. Stipe 4–5 × 0.2–0.3 cm, violet to dark violet grey (5P 3/1) black (7.5 YR 2/1), brownish grey (7.5 YR 5/1) to dark reddish brown (7.5 YR 3/4), central to eccentric, terete, flexuous, smooth, longitudinally striate, rhizomorph present. Odor garlic like and Taste not recorded.
Basidiospores (4.7–)4.8–7.98(–8.8) × 3–4.2 μm, avl × avw = 6.39 × 3.6 μm, Q = 1.56 × 2.9 μm, [Qav = 2.2 µm, n = 20 × 4], obovoid, ellipsoidal to oblong, apiculate, monoguttulate, smooth surface, thin-walled, hyaline in 5% KOH. Basidia 28.2–36.2 × 4.1–7.2 μm, clavate to narrowly clavate, 2‒, 4‒spored, thin walled, hyaline in 5% KOH. Basidioles subclavate to cylindrical, numerous. Cheilocystidia 35.6–41 × 2.8–5.3 μm, cylindrical, irregularly clavate, utriform to broadly utriform, clamped at base, thin-walled, hyaline. Pleurocystidia absent. Pileipellis cutis, composed of irregularly interwoven and cylindrical hyphae, septate, smooth, terminal cells cylindrical to subclavate, 5.9 – 9.8 µm diam., avw = 8.41 µm, irregularly branched to lobate, simple diverticulate, thin-walled, clamp connection extensively present, light brown to brown in 5% KOH. Stipitipellis 3.5–8 µm diam, avw = 5.34 µm, cutis, parallel, branched cylindrical hyphae, septate, smooth, non-dextrinoid, terminal cells cylindrical to subclavate, coralloid, irregularly branched projections, thin to thick-walled. Clamp connections present in all tissues
Distribution: Only known from Kumrat Valley, Khyber Pakhtunkhwa Province, Pakistan. Additional material examined: PAKISTAN. Khyber Pakhtunkhwa, Dir Upper District, Kumrat Valley, found gregarious on moss covered soil, ( 35°32′ 13.5′′ N and 72°13′09.5′′ E, 2232 m, 04 Aug 2022, Aiman Izhar & Abdul Nasir Khalid, KUM _49, (LAH37855), GenBank OR063897 (nrITS), OR063899 (nrLSU).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.