Candolleomyces subcacao 2021

Candolleomyces subcacao T. Bau & J.Q. Yan, sp. nov. 2021

MycoBank No: 839231

Holotype: China. Henan Province: Bird Island, Nanwan Lake, Xinyang City, 32°06'43.32"N, 113°06'03.06"E, 124 m elevation, 17 July 2016, Tolgor Bau, Jun Qing Yan, HMJAU37807 (holotype!)

Morphological description

Sexual morph: Pileus 11–35 mm, spreading hemispherically to planar, hygropha nous, brown, striate up to halfway from the margin or indistinct, becom ing slightly dirty white upon drying. Veil pale brown, thin, f ibrillose, falling off easily. Context thin and very fragile, dirty white, approximately 1.0 mm thick at the centre. Lamellae 3.0–4.0 mm wide, moderatelyclose, adnate to slightly adnexed, pale brown to dark brown, saw-toothed under 20× magnification. Stipe 40–50 mm long, approximately 2.0 mm thick, white, hollow, equal, smooth, with white fibrils at the base. Odour and taste indistinct.

     Spores 6.8–8.0(8.8) × 3.9–4.9 μm, Q = 1.4–1.8, ellipsoid to oblong-ellipsoid, profile slightly flattened on one side, rarely phaseoliform, inamyloid, smooth, pale yellow-brown, darkening in 5% KOH, pale brown, germ pores distinct, but small, approximately 1.0 μm wide. Basidia 17–22 × 6.1–7.3 μm, clavate, hyaline, 4-spored. Pleurocystidia absent. Cheilocystidia 22–36 × 9.8–14 μm, scattered to moderately nu merous, various, utriform to fusiform, with an obtuse to broadly obtuse apex, rarely subcapitate or clavate, ovoid, thin-walled. Trama of gills irregular. Pileipellis consisting of 2–3 cells in the deep layer of the subglobose cell, 20–37 μm wide.

Asexual morph: Undetermined

Culture characteristics:

Habitat: Solitary to scattered on rotten wood in oak forest.

Distribution: China

GenBank Accession:

ITS MW301064; LSU MW301092; β-Tub MW314063; tef-1α MW314081

ITS MW301065; LSU MW301093; β-Tub MW314064; tef-1α MW314082

ITS MW559218; LSU ––; β-Tub ––; tef-1α ––

ITS MW559219; LSU ––; β-Tub ––; tef-1α ––

ITS MW559220; LSU ––; β-Tub ––; tef-1α ––

Notes:

Reference: [1] Bau, T. , &  Yan, J. Q. . (2021). Two new rare species of candolleomyces with pale spores from china. MycoKeys, 80, 149-161.

Basidiomata and microscopic features of Candolleomyces subcacao a–c Basidiomata d spores e basidia f pileipellis g cheilocystidia. Scale bars: 10 mm (a–c); 10 μm (d–g).