Gyroporus swaticus Sana & Kiran, 2025

Gyroporus swaticus Sana & Kiran sp. nov. ( Figs. 3 View FIGURE 3 , 4 View FIGURE 4 & 5 View FIGURE 5 )

MycoBank:—MB857591

Etymology:—The specific epithet “ swaticus ” refers to the locality “Swat” from where the holotype was collected.

Diagnosis:— Gyroporus swaticus is characterized by a flat to concave and brown to orange-brown pileus, adnate hymenophore, broadly ellipsoid to elongate basidiospores (6.6 × 4.3 μm), broadly clavate basidia, mostly lageniform and fusiform, few narrowly utriform cheilocystidia, conical to broadly conical pleurocystidia, a trichodermium pileipellis, and a cutis stipitipellis. It differs from G. castaneus in having brown to orange-brown pileus, adnate hymenophore with pentagonal pores, cylindrical stipe, broadly ellipsoid to elongate basidiospores (6.6 × 4.3 μm), broadly clavate basidia, mostly lageniform and fusiform, few narrowly utriform cheilocystidia, and conical to broadly conical pleurocystidia, subfusiform to narrowly fusiform terminal cells of pileipellis and oblong to elongate, a few narrowly clavate terminal cells of trichoderm stipitipellis.

Holotype:— PAKISTAN. Khyber Pakhtunkhwa Province, Swat District, Aligrama Village , 34.80068° N, 72.31424° E, 908 m a.s.l. on soil under Quercus spp. , 30 July 2023, Wajid Ali AS-16 ( LAH38570 About LAH !; ITS: PV102406; LSU: PV102405 About LSU ). GoogleMaps

Description:—Basidiomata small to medium-sized. Pileus 25–48 mm diam., initially flat becoming hemispheric to convex and finally concave at maturity, initially brown (7.5 YR 4/4 – 7.5 YR 4/6), fading upon age and becoming orange (7.5 YR 6/8) at maturity with a darker brown (7.5 YR 4/6) center, margins smooth and initially decurved becoming uplifted at maturity. Context white, unchanged upon bruising. Hymenophore poroid, adnate, smooth, pores 1–2 per mm, 1–3 mm deep, pentagonal, initially white becoming yellow (5Y 8/6 – 5Y 8/8) with age. Stipe 32 – 55 × 3 – 14 mm, central, initially decurved with a slightly wider base becoming cylindrical upon maturity, brittle, hollow, surface dry, concolorous to pileus.

Basidiospores [40/2/2], (5.1–)6.0–7.2(–8.1) × (3.2–)3.7–5.1(–5.4) μm, avL × avW= 6.6 × 4.3 μm, Q= 1.2–1.9, Q av =1.6, smooth, broadly ellipsoid to elongate. Basidia 17.1–20.63 × 10.86–14.86 µm, broadly clavate, 2–4 spored, mostly bispored, sterigmata almost 2–3 µm long. Basidioles 10.4–14.63 × 6.86–8.86 µm, narrowly clavate to clavate. Cheilocystidia 22.13–30.7 × 12.2–24.47 µm, mostly lageniform and fusiform, a few narrowly utriform. Pleurocystidia, small to big, ranging from 45.23–88.72 × 9.2–22.42 µm, conical to broadly conical. Cystidioles 8.21–10.32 × 6.16– 8.17 µm, obovoid. Trama regular, hyphae 5.1–8.5 µm. Pileipellis trichoderm, hyphae 5–7 µm diam., terminal elements 29–80 × 8–19 µm, subfusiform to narrowly fusiform with obtuse and acute apex. Stipitipellis, a trichoderm, hyphae 4–6 µm diam., terminal elements 37–55 × 9–15 µm, oblong to elongate, a few narrowly clavate, obtuse apex.

Habit and Habitat:— On soil under Quercus spp. in Aligrama Village, Swat, Pakistan.

Additional material examined: PAKISTAN. Khyber Pakhtunkhwa Province, Swat District, Aligrama Village , 34.80068° N, 72.31424° E, 908 m a.s.l. on soil under Quercus spp. , 18 August 2018, Wajid Ali AS-65 ( LAH38569 About LAH !; ITS: PV102404; LSU: PV111937 About LSU ) GoogleMaps .