Candolleomyces virgatus Haqnawaz, Niazi & Khalid 2025, sp. nov.
Creators: name: Li, Qirui
name: Haqnawaz, Muhammad
name: Niazi, Abdul Rehman
name: Khalid, Abdul Nasir
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Fungi
Basidiomycota
Agaricomycetes
Agaricales
Psathyrellaceae
Candolleomyces
Candolleomyces virgatus

description: Candolleomyces virgatus Haqnawaz, Niazi & Khalid sp. nov.
Figs 7, 8
Etymology.
Species name “ virgatus ” (Latin) refers to the virgate pileus surface.
Holotype.
Pakistan • Punjab Province: Kot Addu District, Indus Riverbed, (30°14'44"N, 70°51'04"E, 134 m a. s. l.), on soil, rich in organic matter, 29 Aug 2020, Muhammad Haqnawaz, EF – 17 (Holotype LAH 38259). GenBank: PQ 329543 [ITS], PQ 329549 [LSU], PQ 369430 [tef- 1 α].
Diagnosis.
This species is different from Candolleomyces campanulatus by its parabolic to plane, distinct umbo, virgate surface of pileus, crinkled, 1–7 tiers of forking lamellae, marginate base, longitudinally striation on surface of stipe, lageniform with moniliform at top, moniliform, cylindrical, tibiiform, conical cheilocystidia.
Description.
Basidiomata medium-sized. Pileus 17–30 mm diameter, parabolic at young stage, campanulate to plane, umbonatus, straight shape and regular cap of margins, virgate, light brownish gray (7.5 YR 7 / 1), and dull reddish brown (5 YR 5 / 4) center. Lamellae adnate, broad, crinkled, 1–7 tiers of lamellae, branched or forking; some are not branched, grayish red (10 R 6 / 2). Stipe 40–80 × 1–4 mm, white gray (N 8 / 0), slightly flexuous, hollow, tomentose, and broad at base, marginate, longitudinally striation. Annulus absent.
Basidiospores [150 / 2 / 3], (6 –) 7–9 (– 10) × (4 –) 4.5–5 (– 6) µm, Q = 1.2–1.8, Qav = 1.61, ellipsoid to broadly ellipsoid, thick-walled, smooth, guttulate, germ pore present, purplish to brownish with greenish to yellow guttule in 5 % KOH and water. Basidia (12 –) 13–29 (– 30) × (6 –) 7–9 (– 10) µm, clavate, broadly clavate, hyaline to light yellowish in 5 % KOH, thick-walled, smooth, with 2–4 sterigmata. Cheilocystidia (26 –) 27–46 (– 47) × (8 –) 9–13 (– 14) µm, utriform, lageniform with moniliform at top, moniliform, cylindrical, tibiiform, conical, hyaline to light yellowish in 5 % KOH. Pleurocystidia and Caulocystidia absent. Pileipellis an irregular epithelium; pileipellis cells 30–60 × 20–42 µm diameter, globose to subglobose and ellipsoid to broadly ellipsoid, clavate, hyaline to light yellowish in 5 % KOH. Stipitipellis a cutis, hyphae subregular, branched 6–15 µm in diameter, thin-walled, septate, hyaline to light yellowish in 5 % KOH. Clamp connection present in all tissues.
Ecology and habitat.
Terrestrial, gregarious, scattered, on loamy soil rich in organic matter.
Additional material examined.
Pakistan • Punjab Province: Kot Addu, Noor Shah Thal, (30°27'47"N, 71°02'05"E, 132 m a. s. l.), on loamy soil, 02 September 2020, Muhammad Haqnawaz, KA – 59 (Paratype; LAH 38260) GenBank PQ 329544 [ITS], PQ 329550 [LSU], PQ 369431 [tef- 1 α].
description: Published as part of Li, Qirui, Haqnawaz, Muhammad, Niazi, Abdul Rehman & Khalid, Abdul Nasir, 2025, Phylogenetic studies on the genus Candolleomyces (Psathyrellaceae, Basidiomycota) occurring in the bed of the Indus River, Punjab, Pakistan, reveal three new species, pp. 165-182 in MycoKeys 112 on pages 165-182, DOI: 10.3897/mycokeys.112.141766