Pseudobaorangia lakhanpalii (K. Das, D. Chakraborty, A. Baghela, S. K. Singh & B. T. M. Dentinger,) D. F. Sun, R. Hua, F. Zhou & J. B. Zhang, 2025

Zhou, Fan, Zhang, Junbo, Liu, Shaoxiong, Liu, Qimeng, Luo, Xi, Luo, Xiaokun, Wang, Lei, Liu, Chunli, Guo, Xiang, Feng, Yunli, Sun, Dafeng & Hua, Rong, 2025, Pseudobaorangia (Boletaceae, Boletales), a new genus for Boletus lakhanpalii, MycoKeys 119, pp. 281-294 : 281-294

publication ID

https://doi.org/10.3897/mycokeys.119.144869

DOI

https://doi.org/10.5281/zenodo.15857980

persistent identifier

https://treatment.plazi.org/id/51BB53A4-1281-5559-8402-FF158F7FD06A

treatment provided by

MycoKeys by Pensoft

scientific name

Pseudobaorangia lakhanpalii (K. Das, D. Chakraborty, A. Baghela, S. K. Singh & B. T. M. Dentinger,) D. F. Sun, R. Hua, F. Zhou & J. B. Zhang
status

comb. nov.

Pseudobaorangia lakhanpalii (K. Das, D. Chakraborty, A. Baghela, S. K. Singh & B. T. M. Dentinger,) D. F. Sun, R. Hua, F. Zhou & J. B. Zhang comb. nov.

Figs 2 View Figure 2 , 3 View Figure 3

Basionym.

Boletus lakhanpalii K. Das, D. Chakraborty, A. Baghela, S. K. Singh & B. T. M. Dentinger , Sydowia 67: 14, 2015.

Description.

Pileus 3–5 cm in diameter, greyish-brown (7 E 3) to deep yellow brown (5 E 3), hemispherical to convex when young, applanate to depressed at maturity, surface dry, with a pale yellowish-brown (5 C 3) tomentum and pale yellowish-white (4 A 2) margin slightly enrolled when young, tending to crack into scales with age; context up to 9 mm at the centre of pileus when mature, white (1 A 1) to light yellowish-white (2 A 2), quickly turning blue when cut. Hymenophore slightly depressed and decurrent at stipe apex; pores labyrinthine when young, angular to irregularly arranged when mature, 1–2 per mm, light orange-yellow (4 A 3) to orange-yellow (4 A 5), quickly bluing when touched; tubes 3–6 mm long (in age), orange-yellow (4 A 3) to yellow-brown (4 D 3), turning blue when damaged. Stipe 3–5 × 0.5–1.2 cm, clavate, central, solid, surface pruinose or tiny dots, greyish-brown (1 F 4) to dark red (9 E 3); context is orange-yellow (5 B 3) to reddish-brown (8 D 3) to greyish-brown (8 E 2) from apex to the base, no reaction when cut; basal mycelium yellow (5 A 2) to pale grey (5 B 1). Odour indistinct.

Basidia four-spored, 32.7–48 × 9.8–12.7 μm, clavate, thin-walled, hyaline to pale grey in water, sterigmata 3–6.6 μm long. Basidiospores [100 / 3 / 2] (8.8 –) 9.3–12.3 (– 13.3) × (4.1 –) 4.5–5.5 (– 6) μm, Q = (1.6 –) 1.7–2.5 (– 2.7), Qm = 2.17 ± 0.22, smooth, thin-walled, subellipsoid to amygdaliform, greyish-yellow in water. Hymenophoral trama composed of 4.6–9.5 μm wide, slightly thick-walled interwoven hyphae, hyaline to pale grey in water. Cheilocystidia 27.1–46.4 × 8.4–10.7 μm, uncommon, thin-walled, smooth, subclavate to fusiform with blunt apex, hyaline to pale grey in water. Pleurocystidia 38.8–62.5 × 8.5–9.8 μm, uncommon, thin-walled, smooth, clavate to subfusiform or fusiform with slender apex, hyaline to pale grey in water. Pileipellis a trichoderm composed of interwoven thin-walled hyphae with a diameter of 3.5–6.3 μm, 66–135 μm thick, hyaline to greyish-brown in water; terminal cells clavate or subcylindrical with blunt apex, 10.3–24.9 × 3.6–5.7 μm. Pileus trama composed of 3.5–7.6 μm wide, hyaline to pale grey, thin-walled hyphae. Stipitipellis 40–86 μm thick, clavate, ventricose and subcylindrical terminal cells (19–45 × 4.5–9.5 μm) with rounded apex, hyaline to greyish-brown to yellowish-brown hyphae in water; stipe trama composed of 2.5–6 µm wide, parallel and hyaline hyphae. Clamp connections absent.

Distribution.

Only found in Yunnan Province, China and Sikkim, India.

Habitat.

Mixed forest of Abies georgei and Quercus guyavifolia .

Specimens examined.

China • Yunnan Province: Diqing Tibetan Autonomous Prefecture, Deqin County, Shengping Town, Quzonggong, Baima Snow Mountain Nature Reserve ; 13 August 2024; 28°19.64'N, 99°3.32'E; elev. 3830 m; F. Zhou; 813-75 ( KEF 13271 About KEF ) GoogleMaps ; • same location; 13 August 2024; 28°19.63'N, 99°3.34'E; elev. 3830 m; F. Zhou; 813-78 ( KEF 13272 About KEF ) GoogleMaps .

GenBank accession numbers.

ITS = PQ 773312, nrLSU = PQ 773310, RPB 2 = PQ 824861, TEF 1 - α = PQ 824859 ( KEF 13271 ); ITS = PQ 773313, nrLSU = PQ 773311, TEF 1 - α = PQ 824860 ( KEF 13272 ).

KEF

Kunming Edible Fungi Institute