taxonID	type	description	language	source
09428AF036655F5D99682C87DD4066DE.taxon	description	Figs 3, 4, 5	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
09428AF036655F5D99682C87DD4066DE.taxon	vernacular_names	Chinese name: 丹霞山白丝盖伞	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
09428AF036655F5D99682C87DD4066DE.taxon	diagnosis	Diagnosis. Leucoinocybe danxiashanensis is characterized by its mycenoid basidiomata with umbonate at pileus center, sinuate to free lamellae, orange-white pubescence on the stipe surface, diverse cheilocystidia, and broadly elliptical basidiospores.	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
09428AF036655F5D99682C87DD4066DE.taxon	materials_examined	Holotype. China • Guangdong Province: Shaoguan City, Renhua County, Danxiashan National Nature Reserve, on soil, elev. ca. 150 m, 25 ° 03 ' N, 113 ° 45 ' E, 17 September 2015, Ming Zhang (GDGM 80114, holotype!).	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
09428AF036655F5D99682C87DD4066DE.taxon	etymology	Etymology. The specific epithet “ danxiashanensis ” refers to the type locality, the Danxiashan National Nature Reserve in Guangdong Province of China.	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
09428AF036655F5D99682C87DD4066DE.taxon	description	Description. Basidiomata small, mycenoid. Pileus 7 – 22 mm wide, hemispherical to convex when young, becoming convex to nearly plane when mature, umbonate at center, surface dry, pubescent, smooth or with faint brown-striae at margin, brown (6 E 7) at center, light brown to brownish orange (6 D 5 – 5 B 4) towards margin; margin straight, slightly undulate. Lamellae sinuate to free, subdistant to distant, somewhat waxy, white (2 A 2) to cream when young, orange-white (4 A 3 – 5 A 2) with age, 2 – 4 mm wide, even at edge, often with 1 – 3 unequal lamellulae between two entire lamellae. Stipe 11 – 40 × 1.5 – 2.7 mm, central, cylindrical to subcylindrical, straight or curved, yellowish white (4 A 2) to grayish orange (5 B 4), cartilaginous, hollow, somewhat translucent, covered with orange-white (5 A 2) ﬁne pubescence or pruina; basal mycelium white. Odor and taste not distinctive. Basidiospores [40 / 3 / 3] 6.5 – 8.5 × 4.5 – 6.5 μm, L m = 7.41 ± 0.49 μm, W m = 5.51 ± 0.51 μm, Q = (1.15) 1.17 – 1.45 (1.5) μm, Q m = 1.35 ± 0.09, broadly elliptical to elliptical, thin-walled, smooth, guttulate, amyloid. Basidia 29 – 40 × 5 – 7 μm, clavate, hyaline, mostly 4 - spored, rarely 2 - spored, sterigmata 3 – 5 μm long, thin-walled. Cheilocystidia 45 – 120 × 7 – 23 µm, scattered, balloon-shaped, broadly conical, narrowly lageniform, narrowly utriform, fusoid or nearly cylindrical, sometimes with long pedicellate, thin-walled, hyaline. Pleurocystidia rare, similar to cheilocystidia. Lamellar trama regular to subregular, hyaline hyphae 5 – 25 μm wide, thin-walled. Pileipellis a cutis, made up of radially arranged hyaline or slightly pigmented thin-walled hyphae, 3 – 8 μm wide; pileus trama interwoven to subregular, hyaline hyphae 14.5 – 32 μm wide, thin-walled; pileocystidia 24 – 60 × 6 – 9 μm, clavate, fusoid to lageniform, thin-walled to slightly thick-walled, hyaline or pigmented by with brown intraparietal or encrusted pigment. Stipitipellis a cutis, made up of parallel, repent, thin-walled and hyaline hyphae 2 – 5 μm wide; caulocystidia 32 – 90 × 10 – 15 µm, numerous, often arising directly from the cutis hyphae, variable in shape, balloon-shaped, clavate, fusoid or lageniform with a long pedicellate neck, thin-walled to slightly thick-walled, hyaline. Clamp connections present.	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
09428AF036655F5D99682C87DD4066DE.taxon	biology_ecology	Habitat and distribution. Scattered or in small groups on moss bed or humus-rich soil mainly under bamboo groves, elev. 50 – 150 m, only known from the type locality in southern China.	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
09428AF036655F5D99682C87DD4066DE.taxon	materials_examined	Additional materials examined. China • Guangdong Province: Shaoguan City, Yinhua Town, Danxiashan National Nature Reserve, on soil, elev. ca. 121 m, 25 ° 01 ' N, 113 ° 06 ' E, 22 May 2020, Ming Zhang (GDGM 79543); • Same location, elev. ca. 120 m, 25 ° 00 ' N, 113 ° 68 ' E, 26 May 2020, Ming Zhang (GDGM 80113); Same location, elev. ca. 98 m, 25 ° 00 ' N, 113 ° 68 ' E, 28 May 2020, Ming Zhang (GDGM 80184).	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
09428AF036655F5D99682C87DD4066DE.taxon	discussion	Notes. Morphologically, L. danxiashanensis is similar to L. sulcata, they both share the common characters of brownish pileus. However, L. sulcata is different in its more distinctly sulcate pileus, subdistant lamellae, glabrous stipe and smaller basidiospores (5 – 6.5 × 4 – 5.5 μm) (Deepna Latha et al. 2015). In addition, L. sulcata grows on the bark of living Hydnocarpus (Flacourtiaceae) trees in the tropical region of India (Deepna Latha et al. 2015). Phylogenetically (Figs 1, 2), Leucoinocybe danxiashanensis is closely related to L. papillata, both species have brown pileus and thin-walled cheilocystidia. However, L. papillata, originally described from Pakistan, is different from L. danxiashanensis in having narrower and off-white lamellae, smaller basidiospores (4.8 – 7.4 × 3.9 – 5.8 μm), thick-walled pileocystidia and caulocystidia (Cazabonne et al. 2025).	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
38BDA634E8B351139996526ACAC2CE1A.taxon	description	Figs 6, 7, 8	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
38BDA634E8B351139996526ACAC2CE1A.taxon	vernacular_names	Chinese name: 海珠白丝盖伞	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
38BDA634E8B351139996526ACAC2CE1A.taxon	diagnosis	Diagnosis. Leucoinocybe haizhuensis is characterized by its very small basidiomata, brown to yellowish white pileus with finely pubescent on the surface, diverse shaped cheilocystidia, 2 - spored basidia, elliptical to broadly elliptical and amyloid basidiospores (7 – 9 × 5 – 7 µm).	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
38BDA634E8B351139996526ACAC2CE1A.taxon	materials_examined	Holotype. China • Guangdong Province: Guangzhou City, Haizhu National Wetland Park, elev. ca. 4 m, at 23 ° 3 ' 35 " N, 113 ° 20 ' 30 " E, 7 August 2025, Ruihua Sun and Xinyue Yang (GDGM 102360, holotype!).	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
38BDA634E8B351139996526ACAC2CE1A.taxon	etymology	Etymology. The specific epithet “ haizhuensis ” refers to the type locality of this new taxon, the Haizhu Wetland Park in Guangdong Province of China.	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
38BDA634E8B351139996526ACAC2CE1A.taxon	description	Description. Basidiomata small, mycenoid. Pileus 3 – 8 mm broad, paraboloid, hemispherical to convex, slightly umbonate at center, surface dry, pruinose, chocolate brown, teak brown, burnt umber (6 F 6 – 8), brown (6 E 4 – 6), yellowish brown (6 D 5 – 8), light orange to pale orange (6 B 3 – 5) when young; usually light orange to pale orange (6 B 3 – 5) at center, pale orange, orange white to white (5 A 1 – 3) toward margin when aged; margin straight, undulate, with light yellow (3 A 4, 4 A 4) to pale yellow (3 A 3, 4 A 3) striations. Lamellae adnexed, subdistant to distant, even at edge, white (2 A 2) to cream, often with 1 – 3 unequal lamellulae between two entire lamellae. Stipe 2 – 25 × 0.3 – 0.6 mm, central, hollow, subcylindrical, translucent, fragile, chocolate brown, teak brown, burnt umber (6 F 6 – 8) to brown (6 E 4 – 6) when young, white (1 A 1) when aged, sometimes with brown (6 E 4 – 6) to light orange (5 B 3 – 4), obviously light orange (5 B 3 – 4) at the base, changing to negro to brownish gray (6 F 2 – 3) at age, densely pruinose; basal mycelium white. Odor and taste not recorded. Basidiospores [50 / 3 / 3] 7 – 9 × (5) 5.5 – 7 μm, L m = 8.23 ± 0.58 µm, W m = 6.24 ± 0.42 µm, Q = (1.15) 1.17 – 1.42 (1.45), Q m = 1.32 ± 0.07, broadly elliptical to elliptical, thin-walled, smooth, hyaline in 5 % KOH, guttulate, amyloid. Basidia (18.5) 19 – 35 (36.5) × 5.5 – 7.5 (8) μm, clavate, thin-walled, yellowish white to hyaline, 2 - spored, with sterigmata 2 – 7.5 µm long, sometimes with a white patch, clampless. Cheilocystidia 26 – 44 × 6.5 – 13.5 µm, distinct, ovoid, conical, broadly conical, fusiform, broadly fusiform to subcapitate, sometimes apex acuminate to acute, rarely rostrate, thin-walled, hyaline, clampless. Pleurocystidia absent. Lamellar trama regular to subregular, hyaline hyphae 12 – 27.5 μm wide, thin-walled, clamped. Pileipellis a cutis, composed of fusiform, irregular or subcylindrical hyphae 3 – 12 μm wide, smooth, thin-walled, yellow to yellowish brown, clamped; pileocystidia 22 – 50 × 6.5 – 21.5 μm, ellipsoid, obovoid, clavate, broadly clavate to utriform, thin-walled to slightly thick-walled, yellowish white to hyaline, clampless. Stipitipellis a cutis, 3.5 – 11 μm wide, occasionally upturned, smooth, thin-walled, hyaline, clamped; caulocystidia 15 – 147 × 3 – 8.5 μm, obovoid, clavate, broadly clavate to lanceolate, thin-walled to slightly thick-walled, hyaline, clampless.	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
38BDA634E8B351139996526ACAC2CE1A.taxon	biology_ecology	Habit and distribution. Scattered or gregarious, living on Mangifera trees in broad-leaved forests. Currently only known from the type locality in southwestern China.	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
38BDA634E8B351139996526ACAC2CE1A.taxon	materials_examined	Additional specimen examined. China • Guangdong Province: Guangzhou City, Haizhu National Wetland Park, elev. ca. - 2 m, at 23 ° 4 ' 39 " N, 113 ° 20 ' 4 " E, 29 April 2024, Ruihua Sun and Guorui Zhong (GDGM 94606); • Same location, elev. ca. 7 m, at 23 ° 3 ' 56 " N, 113 ° 20 ' 30 " E, 22 August 2024, Ruihua Sun and Liuying An (GDGM 95340); • Same location, elev. ca. 7 m, at 23 ° 9 ' 9 " N, 113 ° 17 ' 21 " E, 19 June 2025, Ruihua Sun and Guorui Zhong (GDGM 99242); • Same location, elev. ca. 10 m, at 23 ° 4 ' 48 " N, 113 ° 18 ' 12 " E, 19 June 2025, Ruihua Sun and Xinyue Yang (GDGM 99420).	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
38BDA634E8B351139996526ACAC2CE1A.taxon	discussion	Notes. Morphologically, L. lenta is similar to L. haizhuensis. However, L. lenta can be distinguished from L. haizhuensis by its mostly 4 - spored basidia, smaller basidiospores (5.5 – 8 × 4 – 5.5 µm), thick-walled and larger pileocystidia (32 – 140 × 6 – 11 µm) and caulocystidia (50 – 150 × 6 – 16 µm) (Antonín et al. 2019; Kaygusuz et al. 2020; Na et al. 2024). The basidioma color of L. haizhuensis is also similar to L. auricoma. However, L. auricoma differs by its larger basidiomata (pileus up to 25 mm broad), covered with orange to yellowish orange flocci on pileus surface and smaller basidiospores (5 – 7 × 3 – 4 µm) (Takahashi 1999). In nrITS-LSU phylogenetic tree (Fig. 1), L. haizhuensis is closely related to L. taniae, both species have convex pileus, variably shaped cystidia, and similar-sized basidiospores. However, L. taniae, originally described from Spain, is different from L. haizhuensis in having larger basidiomata (pileus up to 15 mm broad), orange to reddish brown pileus, creamy or isabelline lamellae, brown to light orange stipe, 4 - spored basidia (Vila 2002; Antonín et al. 2019). In nrITS phylogenetic tree (Fig. 2), this new species is placed within Leucoinocybe clade, forming a relatively independent clade, and is closely related to L. danxiashanensis and L. papillata. However, L. danxiashanensis is distinguished from L. haizhuensis in having larger basidiomata (pileus 7 – 22 mm broad), light brown to brownish orange pileus, sinuate to free lamellae, narrower basidiospores (6.5 – 8.5 × 4.5 – 6.0 µm), and mostly 4 - spored basidia; L. papillata, originally described from Pakistan, is different from L. haizhuensis in having larger basidiomata (pileus up to 16 mm broad), campanulate with a distinct papilla, mustard brown to turning light brown pileus, sinuate lamellae, smaller basidiospores (4.8 – 7.4 × 3.9 – 5.8 µm) and absent cystidia (Cazabonne et al. 2025). Besides, L. danxiashanensis and L. papillata also differ in growing on forest soil, the ecological characteristic that clearly distinguishes them from L. haizhuensis.	en	Xia, Wen-Xiao, Wang, Chao-Qun, Chen, Xiang-Lian, Sun, Rui-Hua, Fan, Cun-Xiang, Li, Tai-Hui, Deng, Wang-Qiu, Yue, Hai-Mei, Zhang, Ming (2026): Two mycenoid species of Leucoinocybe (Agaricales, Basidiomycota) from southern China. MycoKeys 129: 325-343, DOI: 10.3897/mycokeys.129.174720
