Crepidotus iqbalii A. Izhar, Usman & Khalid 2021, sp. nov.
Creators: name: Izhar, Aiman
name: Usman, Muhammad
name: Khalid, Abdul Nasir
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Fungi
Basidiomycota
Agaricomycetes
Agaricales
Inocybaceae
Crepidotus
Crepidotus iqbalii

description: Crepidotus iqbalii A. Izhar, Usman & Khalid sp. nov. Figs. 2–4
MycoBank:—MB838246
Holotype:— PAKISTAN. Punjab, Sheikhupura, on muddy soil of graveyard, (31°43’3.71”N, 73°57’19.73”E), 236 m a.s.l., 18 August 2018, Aiman Izhar, Skp003 (LAH 36654).
Diagnosis:—Pileus brown to yellow, hygrophanous. Stipe central to slightly eccentric. Basidiospores 8.7–10 × 4.9–6.3 μm, ellipsoid-amygdaliform, almost smooth to finely verruculose. Cheilocystidia clavate to subcylindric. Pleurocystidia absent. Both pileipellis and the stipitipellis a trichoderm with many cystidia. Clamp connections present.
Etymology:—In honor of Prof. Dr. S. H. Iqbal (Late) Mycologist, for his contributions to fungal taxonomy in Pakistan.
Gene sequence ex-holotype:—GenBank MT 97348 (ITS) and MW 888515 (LSU).
Description:— Pileus 15–30 mm diam, reniform when seen from above, hemispherical to convex, a few almost circular, some later becoming flabelliform, bright brown (7.5 YR 5/6) when immature, pale yellow (5 Y 8/4) to yellow (10 YR 8/8) at maturity, umbilicate at disc with dull brown color (7.5 YR 5/4), flabby, hygrophanous, surface smooth to velvety, minutely tomentose near disc, margin straight, later inflexed, tuberculate-striate to rimose. Lamellae 2–4 mm broad, adnate, some emarginate with a decurrent tooth, yellow (10 YR 8/8) when young, later fading to pale yellow (5 Y 8/4), moderately crowded, furcate, edges entire to undulate. Stipe 10–17 × 3–6 mm, central to slightly eccentric, cylindrical, forked near the cap, base broad, pale yellow (5 Y 8/4) near pileus, white to dull orange (7.6 YR 6/4) towards base, turning dark brown (10 YR 3/4) on handling, rubbery, hollow, minutely pruinose, mycelial pad at base. Annulus absent. Odor not characteristic. Taste not checked.
Basidiospores 8.7–10 × 4.9–6.3 μm, Lm × Wm = 9.6 ± 0.7 × 5.4 ± 0.4 μm, Q = 1.7–1.6 μm, avQ = 1.8, ellipsoidamygdaliform, almost smooth to very finely verruculose, thick-walled, with a large and many little brownish gray (10 YR 6/1) guttules. Basidia 22–34 × 7–9 μm, cylindrical to clavate, clamped, mostly 4-spored, few 2-spored, hyaline, thin-walled, granulate, a few large oil drops present. Cheilocystidia 14–28 × 3.6–6.8 μm, mostly clavate or flexuous less cylindric, mostly often septate, clamped. Pleurocystidia absent. Pileipellis a trichoderm, with hyaline, cylindrical hyphae, 4–8 μm, avw = 6 μm, septate, branched, gelatinization present in some of the hyphae, frequently clamped, terminal cells cylindrical or clavate (5–9 μm), occasionally branched. Pileocystidia 19.8–38 × 6.3–7.8 μm, clavate to cylindrical, at times narrowly clavate, lageniform, narrowly utriform, mostly flexuous, clamped. Stipitipellis an intricate trichoderm, with interwoven hyphae 7–5 μm (avw = 4.1 μm), thin to slightly thick-walled, hyaline, septate, some hyphae with gelatinization terminal cells cylindric, clamped. Caulocystidia 10–17 × 3.8–7.6 μm, mostly lageniform to utriform, few lecythiform, clavate, flexuous, grouped, basal cells slightly inflated, hyaline, clamped.
Habitat and distribution:—Pleurotoid, solitary, on muddy soil of a burial ground which adjoins a church, under Ficus benghalensis.
Additional material examined:— PAKISTAN. Punjab, Sheikhupura, on muddy nutrient rich soil of graveyard, (31°43’3.71”N, 73°57’19.73”E), 236 m a.s.l., 4 August 2019, Aiman Izhar, Skp1b (LAH 36655), GenBank MT 973499 (ITS) and MZ 081842 (LSU); ibid. (31°42′40″ N, 73°59′16″ E, 236 m a.s.l., 6 September 2020, Aiman Izhar, Skp2 B (LAH 36656).
description: Published as part of Izhar, Aiman, Usman, Muhammad & Khalid, Abdul Nasir, 2021, Crepidotus iqbalii (Crepidotaceae, Agaricales) a new stipitate species, from Pakistan, pp. 95-107 in Phytotaxa 500 (2) on pages 100-103, DOI: 10.11646/phytotaxa.500.2.2, http://zenodo.org/record/5424475