Infundibulicybe swatica Amjad, Kiran & Khalid, 2024

Kiran, Munazza, Amjad, Atika, Naseer, Arooj, Ullah, Zia, Razzaq, Annum, Hussain, Shah & Khalid, Abdul Nasir, 2024, Infundibulicybe swatica (Basidiomycota, Agaricales), a new species from Pakistan, Phytotaxa 672 (1), pp. 89-98 : 93-95

Infundibulicybe swatica Amjad, Kiran & Khalid , sp.nov. ( Figs. 3 & 4 )

MycoBank: —MB842483

Etymology: —‘ swatica’ represents the type locality from which it was collected.

Diagnosis: — Infundibulicybe swatica differs macro-morphologically from its closest ally Infundibulicybe gibba by pale yellow to pale yellow brown to brown pileus with a dark brown center and bicolorous stipe: white at the apex and pale yellow brown at the base, in contrast to the pinkish tan pileus and white to off-white slightly paler stipe of I.gibba . Anatomically, both species have smooth, lacrymoid to sub-lacrymoid basidiospores but the latter species has longer size of basidiospores (≥ 7 μm).

“ Type: — PAKISTAN. Khyber Pakhtunkhwa Province: Swat District, Sakhra, on soil under mixed coniferous and Quercus trees, 35º 4ʹ 38ʺ North and 72º 24ʹ 48ʺ East 1,480 m, 15 Aug 2019, Zia Ullah, SK-11 (LAH37008!, ITS: OM203466)”.

Description: — Basidiomata small to medium-sized. Pileus 2–7 cm in diameter, umbilicate when young, becoming slightly infundibuliform at maturity, deeply depressed when mature, pale yellow (10YR 8/6) to pale yellow brown (10YR 6/8) to brown (7.5YR 6/6) pileus with a dark brown center (10YR 5/8), surface dry, margins involute, rarely revolute when young, sometimes incised at maturity. Lamellae decurrent, crowded to close, thin, narrow, sometimes forked, cream colored (2.5GY 9/2). Lamellulae present in a single tier. Stipe 5–6 cm long, central or sub-eccentric, equal or sometimes with a slightly enlarged base often with white tomentum adhering to leaves or woody debris, glabrous or slightly longitudinally striated, bicolorous, white at the apex, concolorous to that of pileus at the base. Basidiospores [n/b/p] [60/6/6], (4.0) 4.5 8.5(̶ 9) × (2.0 ̶) 3.5 5.0 (̶ 5.5) µm, avl × avw = 6.5 × 4.2 µm, Q = (1.1‒) 1.2‒2.1 (‒2.8), Qe = 1.6, lacrymoid to sub-lacrymoid, smooth, hyaline, apiculate, inamyloid. Basidia 26 36.5 × 6 8.5 µm (avl × avw = 31 × 7 µm), narrowly clavate, hyaline in KOH, clamped, 2–4 spored, sterigmata 2 2.5 µm long. Hymenial cystidia absent. Pileipellis intricate trichoderm, hyphae septate, cylindrical, 7 13 µm in dia. (av = 10.5 µm). Stipitipellis intricate trichoderm, hyphae septate, cylindrical, interwoven, 3.5 9.5 µm (av = 7.5 µm) in diameter, hyaline in KOH. Clamp connections present in all tissues.

Additional materials examined: PAKISTAN. Khyber Pakhtunkhwa Province: Swat District, Sakhra, 1680 m, on soil, 15 August 2019, Zia Ullah SK 26 ( LAH37009 , ITS: OM203467 ), Shawar Valley, 2100 m, solitary on soil, 28 July 2016, Zia Ullah, AR-09 ( LAH37129 , ITS: ON527812 , LSU: ON527816 ), AR-43 ( LAH37130 , ITS: ON527813 ), solitary on soil under Quercus incana (Bartram,W., Travels Carolina 1791) , 14 July 2015, A. Naseer, M. Kiran & A. N. Khalid, SW-35 ( LAH35235 , ITS: ON527814 ) & SW-86 ( LAH35236 , ITS: ON527815 , LSU: ON527817 ). Punjab province: Rawalpindi District , Bhurban town ; 1828 m, on soil under Pinus ; 7 September 2020, Annum Razzaq BR56 ( ITS: PP345592 ), GC26 ( ITS: PP345593 ), GC25 ( ITS: PP345594 ) .

Figures

FIGURE 3. A–D Basidiomata of Infundibulicybe swatica in the field. Scale bars: A–D =15mm.

FIGURE 4. A–D Line drawings of Infundibulicybe swatica. A—basidia, B—basidiospores, C—pileipellis and D— stipitipellis. Scale bars: A=B= 5 µm, C= 20 µm, D =15 µm.