Tylopilus pallidocervicolor Z. J. Lin &amp; L. H. Qiu 2023, sp. nov.
Creators: name: Lin, Zhi-Jun
name: Li, Hui-Bin
name: Liu, Xiao-Chun
name: Liang, Ying-Shan
name: Huang, Xiao-Xia
name: Qiu, Li-Hong
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Fungi
Basidiomycota
Agaricomycetes
Boletales
Boletaceae
Tylopilus
Tylopilus pallidocervicolor

description: <i>Tylopilus pallidocervicolor</i> Z.J. Lin &amp; L.H. Qiu, <i>sp. nov.</i> (Figs. 3, 4) MycoBank: MB 848015 Etymology:—“ <i>pallido</i> ” (Lat.)—pale; “ <i>cervicolor</i> ” (Lat.)—deer color, referring to the color of the basidiomata. Holotype:— CHINA, GUANGDONG PROVINCE: Guangzhou City, Baiyun Mountain, 23°10′10″ N 113°17′31″ E, elev. 120 m, 20 August 2022, L.H. Qiu, GDGM91094 (GenBank acc. no.: OQ617298 for nrITS, OQ617304 for nrLSU, OQ676968 for <i>rpb1</i>, OQ676973 for <i>rpb2</i>, OQ676977 for <i>tef1-α</i>). Diagnosis:— <i>Tylopilus pallidocervicolor</i> is characterized by tannish brown to light brown basidiomata, stipe with distinct reticulum on upper portion, and a palisadoderm pileipellis. Description:— <i>Basidiomata</i> medium to large-sized. <i>Pileus</i> (3.5) 5–11 cm in diam., hemispherical to subhemispherical when young, applanate to plano-depressed at maturity; surface dry, finely tomentose, reddish brown (#8C3613) to dark brown (#704214) when young, tannish brown (#D2B48C) to light brown (#AC8260) at maturity, paler towards margin with age; context solid when young, spongy with age, white, without discoloration when bruised. <i>Hymenophore</i> poroid, adnate when young, slightly depressed around the apex of stipe with age; surface yellowish brown (#AD8F77) to pinkish brown (#E3B7AC), staining nude (#BF7258) when bruised; pores angular, 0.6–1.1 mm wide; tubes 6–14 mm long, concolorous with hymenophoral surface, slowly staining deep brown (#8E5627) when bruised or aging. <i>Stipe</i> 4–6.8 × 2.1–2.3 cm, clavate to subcylindrical, moderately enlarged downwards when young, attenuate at middle at maturity; surface predominantly concolorous with pileus, distinctly reticulate over upper portion, slowly staining brownish red when touched; context solid, pallid, slowly staining brown (#8C794E, #5A3E29) when bruised; basal mycelium pallid to yellowish. <i>Spore print</i> not obtained. <i>Taste</i> not obtained. <i>Odor</i> mild. <i>Basidiospores</i> [200/3/3] (8.8) 10.1–12.0 (15.0) × (3.1–)3.5–4.1 (4.8) μm, Q = (2.39–)2.66–3.23 (–3.51), Q m = 2.94 ± 0.22, ellipsoid to cylindrical, smooth under light microscope and SEM, hyaline to yellowish brown in KOH, yellowish brown in Melzer’s reagent. <i>Basidia</i> 22–29 × 7–10 μm, clavate, 4-sterigmata, hyaline in KOH. <i>Hymenophoral trama</i> boletoid, composed of 8–11 μm wide cylindrical hyphae, thin-walled, hyaline in KOH. <i>Cheilocystidia</i> moderate, scattered, 43–56 × 8–13 μm, ventricose to ventricose-mucronate, thin-walled, yellowish brown in KOH. <i>Pleurocystidia</i> rare, scattered, 64–78 × 7–14 μm, fusiform to subfusiform, thin-walled, yellowish brown in KOH. <i>Pileipellis</i> a palisadoderm, composed of 6–10 wide μm hyphae, thin-walled, hyaline or yellowish in KOH, yellowish brown in Melzer’s reagent; terminal cells 24–54 (64) × 9.0–16.1 (20) μm, fusiform to subfusiform or ventricose, thin-walled, hyaline or yellowish to brownish in KOH. <i>Pileal trama</i> composed of 5–12 μm wide interwoven cylindrical hyphae, thin-walled, hyaline in KOH. <i>Stipitipellis</i> a cutis about 236 μm thick, composed of 3–7 μm wide cylindrical hyphae, thin walled, yellowish to brownish in KOH. <i>Stipe trama</i> composed of cylindrical hyphae 5–8 μm wide, thin-walled, hyaline in KOH. <i>Clamp connections</i> absent in all tissues. Habitat:—Scattered to solitary on soil in subtropical forests dominated by Fabaceae and Fagaceae. Distribution:—Currently known from southern China. Additional specimens examined:— CHINA, GUANGDONG PROVINCE: Guangzhou City, Baiyun Mountain: 23°10′7″ N 113°17′31″ E, elev. 90 m, 5 June 2021, GDGM91091, L.H. Qiu; 23°10′7″ N 113°17′31″ E, elev. 119 m, 12 June 2021, B21061201, X.X. Huang; 23°10′3″ N 113°17′32″ E, elev. 88 m, 16 August 2021, GDGM91092, L.H. Qiu; 23°10′3″ N 113°17′29″ E, elev. 88 m, 4 September 2021, GDGM91093, Z.J. Lin &amp; Y.S. Liang.
description: Published as part of <i>Lin, Zhi-Jun, Li, Hui-Bin, Liu, Xiao-Chun, Liang, Ying-Shan, Huang, Xiao-Xia &amp; Qiu, Li-Hong, 2023, Tylopilus pallidocervicolor, a new species from Baiyun Mountain, Guangzhou, China, pp. 137-151 in Phytotaxa 619 (2)</i> on pages 139-144, DOI: 10.11646/phytotaxa.619.2.2, http://zenodo.org/record/8425871