taxonID	type	description	language	source
38BF004A9FF65EF8890F1AE7494656C2.taxon	description	Figs 2 a, b, 3	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
38BF004A9FF65EF8890F1AE7494656C2.taxon	description	Description. Basidiomata small-sized. Pileus 3 – 4 cm in diameter, subhemispherical to convex; surface dry, ﬁnely tomentose, orangish-yellow to golden-yellow (4 A 6 – 5 A 7); context 0.4 – 0.6 cm in thickness in the center of the pileus, white (1 A 1) to yellowish (1 A 2), unchanging in color when bruised. Hymenophore poroid, slightly decurrent; pores angular to roundish, yellow, changing greenish-blue when bruised; tubes 0.1 – 0.3 cm long, yellow, changing greenish-blue when bruised. Stipe 3 – 5 × 1 – 2 cm, central, solid, subcylindrical, surface tomentose, upper part pale yellow to yellow (3 A 4 – 3 A 5), lower part orangish-brown to ochre (5 C 5 – 6 C 6); context white (1 A 1) to yellowish (1 A 2), unchanging in color when bruised; basal mycelium white. Odor indistinct. Taste mild. Basidiospores [40 / 2 / 1] (6) 6.5 – 9 × (3) 3.5 – 4 μm, Q = (1.5) 1.75 – 3.0, Qm = 2.30 ± 0.32, yellowish brown in KOH, elongated to cylindrical, slightly thick-walled (0.8 – 1 µm), smooth under the light microscope. Basidia 14 – 29 × 5 – 8 μm, clavate, slightly thick-walled (up to 1 µm), 4 - spored, hyaline to pale yellow in KOH; sterigmata 2 – 5 μm in length. Cystidia 20 – 35 × 5 – 7 μm, fusiform or subfusiform, slightly thick-walled (up to 1 μm), pale yellow in KOH. Hymenophoral trama boletoid, colorless to yellowish in KOH, thin- to slightly thick-walled (up to 0.5 μm), 6 – 12 μm wide. Pileipellis an intricate trichoderm 400 – 550 μm in thickness, composed of hyaline to pale yellow in KOH, slightly thick-walled (up to 1 μm) hyphae; terminal cells 9 – 37 × 3 – 7 μm, clavate to subcylindrical or cystidioid. Pileus trama made up of hyphae 2 – 9 μm in diameter, thick-walled (up to 1.5 μm), yellow in KOH. Stipitipellis a trichoderm-like structure 160 – 200 μm thick, composed of pale yellow in KOH, thin-walled hyphae; terminal cells 18 – 27 × 5 – 8 μm, clavate or subcylindrical. Stipe trama composed of parallel hyphae 2 – 16 μm in diameter, cylindrical, thin-walled, yellow in KOH. Clamp connections absent in all tissues.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
38BF004A9FF65EF8890F1AE7494656C2.taxon	distribution	Known distribution. Southern (Hainan Province) and northeastern China (Heilongjiang Province); Europe, North America, Nepal, Korea, and Indonesia (Kallenbach 1929; Aryal and Budathoki 2013; Wu et al. 2016; Venturella 2017; Jo et al. 2019; Putra et al. 2025).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
E06F48463D025412B667C070E6F2B61A.taxon	distribution	Known distribution. Southwestern (Yunnan Province) and southern China (Hainan Province and Hong Kong); Sri Lanka, Malaysia, India, and the Philippines (Pegler 1986; Corner 1972; Ortiz-Santana and Both 2011; Xie et al. 2021; Nanu and Kumar 2022).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
24AF8F349D1952199B6BB33BA5FC2E3D.taxon	description	Figs 2 c – e, 4	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
24AF8F349D1952199B6BB33BA5FC2E3D.taxon	etymology	Etymology. Latin “ aurantiolepidotus ”, referring to the orange squamules on the pileal surface.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
24AF8F349D1952199B6BB33BA5FC2E3D.taxon	diagnosis	Diagnosis. Differs from closest species of Chalciporus by a very small basidioma, a dry pileus covered with orange to reddish squamules, a reddish-orange to reddish hymenophore, and a trichodermal pileipellis.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
24AF8F349D1952199B6BB33BA5FC2E3D.taxon	description	Description. Basidiomata very small-sized. Pileus 2 – 2.5 cm in diameter, subhemispherical to convex when young, plano-convex to applanate when mature, margin occasionally upturned; surface dry, covered with orange (6 B 4) to reddish (6 B 3) squamules; context 0.2 – 0.3 cm in thickness in the center of the pileus, white (1 A 1), unchanging in color when bruised. Hymenophore poroid, slightly decurrent; pores angular, 0.1 – 0.25 cm wide, reddish-orange (7 A 4) to reddish (8 A 5), unchanging in color when bruised; tubes 0.2 – 0.3 cm long, reddish (8 A 5), unchanging in color when bruised. Stipe 1.6 – 1.7 × 0.3 cm, central, solid, subcylindrical; surface pale brown, with distinctly longitudinal striations; context white (1 A 1), unchanging in color when bruised; basal mycelium white. Odor indistinct. Taste mild. Basidiospores [60 / 8 / 3] (8) 8.5 – 11 (12) × 4 – 5 μm, Q = (1.6) 1.7 – 2.5 (3.0), Q m = 2.22 ± 0.28, yellowish-brown in KOH, elongated to cylindrical, slightly thick-walled (0.8 – 1 µm), smooth under the light microscope. Basidia 18 – 30 × 8 – 12 μm, clavate, slightly thick-walled (up to 1 µm), 4 - spored, colorless to pale yellow in KOH; sterigmata 2 – 5.5 μm in length. Cheilocystidia 38 – 63 × 8 – 12 μm, fusiform or subfusiform, slightly thick-walled (up to 1 μm), colorless to pale yellow in KOH. Pleurocystidia 41 – 61 × 9 – 13 μm, fusiform or subfusiform, slightly thick-walled (up to 1 μm), pale yellow in KOH. Hymenophoral trama boletoid, colorless to yellowish in KOH, thin- to slightly thick-walled (up to 0.5 μm), 5 – 10 μm wide. Pileipellis a trichoderm 250 – 300 μm in thickness, composed of pale yellow in KOH, slightly thick-walled (up to 1 μm) hyphae; terminal cells 20 – 61 × 5 – 9 μm, clavate to subcylindrical or cystidioid. Pileus trama made up of hyphae 5 – 19 μm in diameter, thick-walled (up to 1.5 μm), yellow in KOH. Stipitipellis a trichoderm-like structure 150 – 200 μm thick, composed of hyaline to pale yellow in KOH, thin-walled hyphae; terminal cells 15 – 30 × 4 – 7 μm, clavate or subcylindrical, occasionally subfusiform. Stipe trama composed of parallel hyphae 3 – 7 μm in diameter, cylindrical, thin-walled, yellow in KOH. Clamp connections absent in all tissues.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
24AF8F349D1952199B6BB33BA5FC2E3D.taxon	distribution	Known distribution. Southern China (Hainan Province), probably Guangdong Province, and Thailand (Fig. 1).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
E3821C42DAC1563BBE33A4D943EDB56F.taxon	description	Figs 2 f – h, 5	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
E3821C42DAC1563BBE33A4D943EDB56F.taxon	etymology	Etymology. Latin “ brunneus ”, referring to the pale brown to brown pileus.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
E3821C42DAC1563BBE33A4D943EDB56F.taxon	diagnosis	Diagnosis. Differs from closest species of Chalciporus by a pale brown to brown pileus, a yellowish-white context unchanging when bruised, a yellow hymenophore, a stipe usually reddish at the apex, and an intricate trichodermal pileipellis.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
E3821C42DAC1563BBE33A4D943EDB56F.taxon	description	Description. Basidiomata very small to small-sized. Pileus 1.2 – 3.6 cm in diameter, subhemispherical to convex or plano-convex, margin incurved; surface slightly viscid when wet, pale brown to brown (6 C 2 – 6 C 3); context 0.2 – 0.7 cm in thickness in the center of the pileus, yellowish white (1 A 2), unchanging in color when bruised. Hymenophore poroid, slightly decurrent; pores roundish or angular, 0.15 – 0.25 cm wide, yellow (5 A 4), unchanging in color when bruised; tubes approximately 0.3 cm long, yellowish orange (5 A 5), unchanging in color when bruised. Stipe 1.8 – 3.8 × 0.3 – 0.65 cm, central, solid, subcylindrical; surface smooth, usually reddish at the apex, yellowish white (1 A 2) in the upper part, gradually becoming brown (6 B 2) toward the base, with distinct reddish longitudinal striations; context yellowish white (1 A 2), unchanging in color when bruised; basal mycelium white. Odor indistinct. Taste mild. Basidiospores [160 / 8 / 4] (7) 8 – 10.5 (11) × 3 – 5 μm, Q = (1.70) 1.90 – 3.00 (3.33), Q m = 2.34 ± 0.31, yellowish brown in KOH, elongated to cylindrical, slightly thick-walled (0.8 – 1 µm), smooth under the light microscope. Basidia 19 – 30 × 6 – 9 μm, clavate, slightly thick-walled (up to 1 µm), 4 - spored, colorless to pale yellow in KOH; sterigmata 2 – 4 μm in length. Cheilocystidia 33 – 65 × 5 – 11 μm, fusiform or subfusiform, slightly thick-walled (up to 1 µm), colorless in KOH. Pleurocystidia 33 – 71 × 6 – 9 μm, fusiform or subfusiform, slightly thick-walled (up to 1 µm), colorless in KOH. Hymenophoral trama boletoid, colorless to yellowish in KOH, thin- to slightly thick-walled (up to 0.5 μm), 4 – 10 μm wide. Pileipellis an intricate trichoderm 200 – 360 μm in thickness, composed of hyaline in KOH, slightly thick-walled (up to 1 µm) hyphae; terminal cells 8 – 69 × 4 – 8 μm, clavate to subcylindrical or cystidioid. Pileus trama made up of hyphae 4 – 20 μm in diameter, slightly thick-walled (up to 1 µm), colorless in KOH. Stipitipellis a trichoderm-like structure 150 – 300 μm thick, composed of hyaline to pale yellow in KOH, slightly thick-walled (up to 1 µm) hyphae; terminal cells 30 – 60 × 5 – 6 μm, clavate or subcylindrical, occasionally subfusiform. Stipe trama composed of parallel hyphae 3 – 13 μm in diameter, cylindrical, thin- to slightly thick-walled (up to 1 μm), hyaline to pale yellow in KOH. Clamp connections absent in all tissues.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
E3821C42DAC1563BBE33A4D943EDB56F.taxon	distribution	Known distribution. Southern China (Hainan Province).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
C07D2934170F51E0A1F817497AF48080.taxon	distribution	Known distribution. Central (Hunan Province) and eastern China (Zhejiang Province) (Zhang et al. 2017).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
1D53C5A7F5335F4BBA1A40BEFD6DAA94.taxon	description	Figs 2 i, 6	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
1D53C5A7F5335F4BBA1A40BEFD6DAA94.taxon	description	Description. Basidiomata very small-sized. Pileus 1 – 2 cm in diameter, subhemispherical to convex when young, plano-convex to applanate when mature; surface dry, tomentose, light orange-brown (5 A 3 – 5 A 4); context 0.2 – 0.5 cm in thickness in the center of the pileus, white (1 A 1), changing red when bruised. Hymenophore poroid, slightly decurrent; pores angular, about 0.1 cm wide, reddish orange (6 A 5 – 6 A 6); tubes about 0.2 cm long, reddish orange (6 A 5). Stipe 1.1 – 2.3 × 0.2 cm, central, solid, subcylindrical; surface orange-brown to brown (5 B 4 – 5 B 6), but reddish at the apex, with distinctly longitudinal striations; context white (1 A 1), changing red when bruised; basal mycelium white. Odor indistinct. Taste mild. Basidiospores [80 / 4 / 1] 7.5 – 10 × 3.5 – 5 μm, Q = (1.70) 1.88 – 2.50 (2.57), Q m = 2.16 ± 0.19, yellowish brown in KOH, elongated to cylindrical, thin-walled, smooth under the light microscope. Basidia 17 – 30 × 8 – 10.5 μm, clavate, thin-walled, 4 - spored, colorless in KOH; sterigmata 3 – 5 μm in length. Cheilocystidia 17 – 31 × 6 – 12 μm, fusiform or subfusiform, slightly thick-walled (up to 1 μm), colorless in KOH. Pleurocystidia 22 – 35 × 7 – 10 μm, fusiform or subfusiform, slightly thick-walled (up to 1 μm), colorless in KOH. Hymenophoral trama boletoid, yellowish in KOH, thin- to slightly thick-walled (up to 0.5 μm), 3 – 11 μm wide. Pileipellis a trichoderm 200 – 350 μm in thickness, composed of pale yellow in KOH, slightly thick-walled (up to 1 μm) hyphae; terminal cells 20 – 65 × 7 – 9 μm, clavate to subcylindrical or cystidioid. Pileus trama made up of hyphae 1 – 9 μm in diameter, thin-walled, colorless to pale yellow in KOH. Stipitipellis a trichoderm-like structure 150 – 250 μm thick, composed of hyaline to pale yellow in KOH, slightly thin-walled (up to 1 μm) hyphae; terminal cells 10 – 30 × 5 – 8 μm, clavate or subcylindrical, occasionally fusiform. Stipe trama composed of parallel hyphae 4 – 15 μm in diameter, cylindrical, thin-walled, yellow in KOH. Clamp connections absent in all tissues.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
1D53C5A7F5335F4BBA1A40BEFD6DAA94.taxon	distribution	Known distribution. Southern (Hainan Province) and southeastern China (Fujian Province).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
B88FE090702B57198A07E4F95672E09D.taxon	distribution	Known distribution. Northern China (Shanxi Province), Europe, and North America (Halling et al. 2004; Wu et al. 2014; Xu et al. 2021; Mao et al. 2023); probably southwestern China (Yunnan Province) (Fig. 1).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
30A298ED2A3E56819C7A69243D36D1F7.taxon	distribution	Known distribution. Central (Hunan Province), eastern (Zhejiang Province), southeastern (Fujian Province), and southern China (Guangdong and Hainan Provinces) (Zhang et al. 2016; Chai et al. 2019).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
7BE7A3537E17584B9F89C9B24EF14E2B.taxon	description	Figs 2 j – l, 7	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
7BE7A3537E17584B9F89C9B24EF14E2B.taxon	etymology	Etymology. Latin “ roseus ”, referring to pinkinsh to dark reddish pileus.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
7BE7A3537E17584B9F89C9B24EF14E2B.taxon	diagnosis	Diagnosis. Differs from closest species of Chalciporus by a pinkish to dark reddish pileus with squamules, a yellow hymenophore bruising blue, a pale yellow context changing blue when bruised, broadly ellipsoid to elongate basidiospores measuring 4 – 5.5 × 3 – 3.5 μm, and a trichodermal pileipellis.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
7BE7A3537E17584B9F89C9B24EF14E2B.taxon	description	Description. Basidiomata small-sized. Pileus 2.8 – 4.1 cm in diameter, hemispherical to applanate; surface dry, pinkish to dark reddish (11 A 4 – 11 B 5), covered with squamules; context 0.3 – 0.7 cm in thickness in the center of the pileus, pale yellow (1 A 2), changing blue when bruised. Hymenophore poroid, slightly decurrent; pores subangular to roundish, 0.1 – 0.25 cm wide, yellow (1 A 4), changing blue in color when bruised; tubes yellowish, changing blue when bruised. Stipe 4.7 – 6.2 × 0.4 – 0.8 cm, central, solid, subcylindrical; surface pinkish to dark reddish (11 A 4 – 11 B 5), with distinctly longitudinal striations; context pale yellow (1 A 2), changing red when bruised; basal mycelium white. Odor indistinct. Taste mild. Basidiospores [60 / 3 / 3] (3.5) 4 – 5.5 (6) × (2.5) 3 – 3.5 (4) μm, Q = (1.14) 1.17 – 1.83 (2.0), Q m = 1.54 ± 0.18, yellowish brown in KOH, broadly ellipsoid, ellipsoid to elongate, slightly thick-walled (0.8 – 1 µm), smooth under the light microscope. Basidia 7 – 22 × 4 – 8 μm, clavate, thin-walled, 4 - spored, colorless to pale yellow in KOH; sterigmata 2 – 6 μm in length. Cheilocystidia 26 – 44 × 5 – 9 μm, fusiform or subfusiform, slightly thick-walled (up to 1 μm), colorless to pale yellow in KOH. Pleurocystidia 19 – 43 × 5 – 8 μm, fusiform or subfusiform, thin-walled, colorless to pale yellow in KOH. Hymenophoral trama boletoid, colorless to yellowish in KOH, thin- to slightly thick-walled (up to 0.5 μm), 9 – 15 μm wide. Pileipellis a trichoderm 150 – 250 μm in thickness, composed of colorless to pale yellow in KOH, slightly thick-walled (up to 1 μm) hyphae; terminal cells 14 – 40 × 6 – 10 μm, clavate to subcylindrical or cystidioid. Pileus trama made up of hyphae 5 – 19 μm in diameter, slightly thick-walled (up to 1 μm), colorless in KOH. Stipitipellis a trichoderm-like structure 700 – 800 μm thick, composed of hyaline to pale yellow in KOH, thin-walled hyphae; terminal cells 10 – 29 × 4.5 – 9 μm, clavate or subcylindrical. Stipe trama composed of parallel hyphae 3 – 7 μm diameter, cylindrical, thin-walled, yellow in KOH. Clamp connections absent in all tissues.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
7BE7A3537E17584B9F89C9B24EF14E2B.taxon	distribution	Known distribution. Southern China (Hainan Province).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
241BE5515D90573DB1640F3DB39582E1.taxon	distribution	Known distribution. Southwestern China (Yunnan Province) (Wu et al. 2016).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
B3E9DD7EB92B5AB796D5072C7E371A4B.taxon	distribution	Known distribution. Southern China (Hainan Province) (Xu et al. 2021).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
B618092EB77059C39E8C61FFA59FDBD5.taxon	distribution	Known distribution. Southern China (Hainan Province) (Xu et al. 2021).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
62CFFCC32EDD55ECBC253802B33EBB24.taxon	distribution	Known distribution. Eastern China (Zhejiang Province) (Qin et al. 2024).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
0A53BB281E14515FB8A9E86CB7E92D13.taxon	description	Figs 2 m – o, 8	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
0A53BB281E14515FB8A9E86CB7E92D13.taxon	etymology	Etymology. Latin “ castaneus ”, referring to the chestnut-brown pileus.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
0A53BB281E14515FB8A9E86CB7E92D13.taxon	diagnosis	Diagnosis. Differs from closest species of Pseudophylloporus by a chestnut-brown pileus, cystidia with golden or yellowish-brown plasmatic pigments, and an intricate trichodermal pileipellis.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
0A53BB281E14515FB8A9E86CB7E92D13.taxon	description	Description. Basidiomata very small-sized. Pileus 2.5 – 3 cm in diameter, subhemispherical when young, then subhemispherical to plano-convex; surface dry, tomentose, chestnut-brown (5 E 7 – 5 E 8); context 0.3 – 0.6 cm in thickness in the center of the pileus, white (1 A 1), changing bluish when injured. Hymenophore lamellate, free; lamellae 0.1 – 0.3 cm in height, subdistant, usually forked, brown (5 D 4), turning blue quickly. Stipe 1.7 – 2.6 × 0.3 – 0.5 cm, clavate or tapering upwards, solid; surface yellow (4 A 3) to yellowish-brown (4 C 5), with purple-reddish (10 E 3) longitudinal striations; context pale yellow (2 A 2), changing blue slightly when injured; basal mycelium yellowish (2 A 4). Odor indistinct. Taste mild. Basidiospores [60 / 3 / 3] 8 – 9.5 (10) × 3 – 4 (4.5) μm, Q = 2.0 – 3.0, Q m = 2.44 ± 0.29, yellowish brown in KOH, fusoid to cylindrical, slightly thick-walled (0.8 – 1 µm), smooth under the light microscope. Basidia 24 – 34 × 5 – 8 μm, clavate, slightly thick-walled (0.8 – 1 µm), 4 - spored, colorless to pale yellow in KOH; sterigmata 2 – 5 μm in length. Cheilocystidia 43 – 65 × 10 – 15 μm, abundant, ventricose, subclavate or subfusiform, slightly thick-walled (up to 1 μm), with golden or yellowish brown plasmatic pigment in KOH. Pleurocystidia 41 – 65 × 8 – 15 μm, subclavate or subfusiform, thin- to slightly thick-walled (up to 1 μm), with golden or yellowish brown plasmatic pigment in KOH. Hymenophoral trama boletoid, colorless to yellowish in KOH, thin- to slightly thick-walled (up to 0.5 μm), 4 – 17 μm wide. Pileipellis an intricate trichoderm 150 – 350 μm in thickness, composed of light yellow in KOH, slightly thick-walled (up to 1 μm) hyphae; terminal cells 25 – 95 × 4 – 9 μm, clavate to subcylindrical or cystidioid. Pileus trama made up of hyphae 4 – 10 μm in diameter, slightly thick-walled (up to 1 μm), yellow in KOH. Stipitipellis a trichoderm-like structure 30 – 100 μm thick, composed of pale yellow in KOH, slightly thick-walled (up to 1 μm) hyphae, terminal cells 30 – 60 × 5 – 6 μm, subclavate or clavate. Stipe trama composed of parallel hyphae 5 – 30 μm in diameter, cylindrical, thin- to slightly thick-walled (up to 0.5 μm), pale yellow in KOH. Clamp connections present in all tissues.	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
0A53BB281E14515FB8A9E86CB7E92D13.taxon	distribution	Known distribution. Eastern China (Zhejiang Province).	en	Zhang, Xu, Li, Xin-Ni, Liang, Wei-Qing, Mu, Xiao-Dong, Yu, Ye-Fei, Wu, Xiao-Jun, Chen, Si-Yu, Pu, Jin-Bao, Zeng, Nian-Kai (2025): The subfamily Chalciporoideae (Boletaceae, Boletales) in China. MycoKeys 124: 123-157, DOI: 10.3897/mycokeys.124.165901
