taxonID	type	description	language	source
BDAF011A1B4857CD9F9046A2FCA8AF49.taxon	description	Description. Basidiomata small to medium-sized, terrestrial or lignicolous. Pileus conical until mature, almost glabrous to finely sulcate but never cracking into plication, veil absent, brown hairs present. Lamellae adnate, withering at age. Stipes hollow, most glabrous. Basidiospores not flattened, ellipsoid to ovoid in front view and side view, germ pore central. Basidia monomorphic, regularly 4 - spored. Lamellae trama regular, colorless or in brown hue. Lamellae margin infertile, cheilocystidia abundant, subglobose, utriform, ellipsoid, sublageniform. Pleurocystidia present or not, when present subglobose, utriform, sublageniform or subcylindrical. Original pileipellis a hymeniform, composed of sphaeropedunculate cells, secondary pileipellis absent. Sclerocystidia present. Caulocystidia present at upper part of stipe, uniformly or in small cluster distributed, subglobose, utriform, sublageniform or (sub) cylindrical. Clamps present and sometimes present pseudoclamps.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
FA3C6FC81F6E5AEFAC760604D5EAE1A9.taxon	description	Description. Basidiomata small-sized, mainly terrestrial, sometimes fimicolous or lignicolous, withering or partial deliquescent at age. Pileus almost flattened cracking into plication when mature, veil absent. Lamellae free, mostly remote from stipe, withering. Stipes hollow, most glabrous, occasionally with flour scales. Basidiospores subglobose, ellipsoid, ovoid, rounded subtriangular, rhombic, subpentangular, hexagonal in front view, ellipsoid or lentiform in side view, germ pore central or eccentric. Basidia dimorphic, regularly 4 - spored. Lamellae trama regular, colorless or in brown hue. Lamellae margin infertile, cheilocystidia abundant, subglobose, utriform, ellipsoid, sublageniform or subcylindrical. Pleurocystidia mainly present, subglobose, utriform, sublageniform or subcylindrical. Original pileipellis hymeniform, secondary pileipellis subcutis. Caulocystidia only accumulate at top of stipe forming pseudocollarium. Clamps present and sometimes present pseudoclamps.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
3708EAE6EB3E5E74B1AFAE3F41A352C8.taxon	description	Figs 12 d – f, 14	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
3708EAE6EB3E5E74B1AFAE3F41A352C8.taxon	diagnosis	Diagnosis. Pileus sordid yellow, ochreous to dark red-brown at center and gray or pale gray at margin when mature; basidiospores 11.4 – 12.0 × 10.0 – 10.4 × 8.4 – 9.4 μm, ovoid or broadly ellipsoid, sometimes lemon-shaped in front view, dark red-brown to almost black, germ pore eccentric, 1.7 – 3.5 μm wide; basidia dimorphic; cheilocystidia 30 – 75 × 12 – 27 μm, ellipsoid, sublageniform or constricted-cylindrical; pleurocystidia 34 – 103 × 10 – 25 μm, narrow utriform, sublageniform, (sub) cylindrical or clavate.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
3708EAE6EB3E5E74B1AFAE3F41A352C8.taxon	etymology	Etymology. The specific epithet “ chowii ” is a tribute to the Chinese mycologist Chung-Hwang Chow for his contribution to the study of ontogeny of coprinoid fungi.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
3708EAE6EB3E5E74B1AFAE3F41A352C8.taxon	description	Description. Pileus 6 – 8 × 9 – 12 mm when still closed, up to 14 mm when mature, at first ovoid or ellipsoid, expanded pileus conical to flattened; dry; sordid yellow, ochreous to dark red brown at center, gray or pale gray at margin, sometimes with slightly brown hue; sulcate-striate up to center. Context extremely thin, almost unseen in membrane part of pileus, somewhat fleshy and up to 0.8 mm in central disc, white to pale gray, odor and taste not distinctive. Lamellae crowded, free and remote from stipe, with a circular empty space which is visible around the apex of the stipe, 1 – 2 mm in wide, L = 35 – 41, I = 1 – 2, first white to beige, then become purple-gray to dark gray, hardly deliquescent with age. Stipe 20 – 51 × 1 – 2 mm, cylindrical, hollow, equal or attenuate towards the apex, white, glabrous; with white tomentose at base. Spore print not recorded. Basidiospores [60, 4, 3] (10.2 –) 11.4 – 12.0 (– 13.8) × (9.0 –) 10.0 – 10.4 (– 11.4) × (7.8 –) 8.4 – 9.4 (– 9.9) μm, Q 1 = 1.06 – 1.28, Q 2 = 1.22 – 1.40, av. Q 1 = 1.14, av. Q 2 = 1.28; subglobose, ovoid or broadly ellipsoid, sometimes lemon-shaped, with apical papilla and convex base in front view, flattened, broadly ellipsoid to ellipsoid in side view; smooth, dark red-brown to almost black, with yellow-brown oil droplet; inamyloid; germ pore eccentric, 1.7 – 3.5 μm wide. Basidia dimorphic, 20 – 41 × 9 – 12 μm, sterigma 4 – 7 μm, clavate, sometimes constricted in middle part, hyaline, 4 - spored, surrounded with 4 – 7 pseudoparaphyses; subhymenium composed of subglobose, ellipsoid, oblong or cylindrical elements, 10 – 28 × 7 – 19 μm. Cheilocystidia abundant, 30 – 75 × 12 – 27 μm, ellipsoid, sublageniform or constricted cylindrical, smooth, colorless, thin-walled. Pleurocystidia 34 – 103 × 10 – 25 μm, narrow utriform, sublageniform, (sub) cylindrical or clavate, colorless, thin-walled. Lamella trama regular, 3 – 5 μm wide, hyaline, colorless, thin-walled. Pileipellis a hymeniderm, made up of sphaeropedunculate cells, 33 – 49 × 15 – 36 μm, hyaline, with brown hue at base; pileus trama hyphae densely interwoven, thin-walled, hyaline, yellow brown to brown, 3 – 5 μm wide. Stipipellis hyphae 3 – 11 μm in wide, hyaline, thin-walled, colorless, thin-walled; hyphae of stipe trama 8 – 16 μm wide, colorless, thin-walled; caulocystidia unseen. Clamp connection abundant.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
46CC4C4EBAA751C9ACFA9DC9953C88C8.taxon	description	Figs 8 h – i, 9	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
46CC4C4EBAA751C9ACFA9DC9953C88C8.taxon	etymology	Etymology. The specific epithet “ constrictospora ” means the constricted ellipsoid shape of basidiospores.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
46CC4C4EBAA751C9ACFA9DC9953C88C8.taxon	diagnosis	Diagnosis. Pileus sordid yellow to cinnamon with grayish hue when young, orange-brown to chestnut-color at center, brown-gray to gray at margin when age; fine sulcate-striate up to center; context thin, pale gray to gray; basidiospores 10.7 – 11.4 × 8.8 – 9.1 × 6.4 – 6.9 μm, broad ellipsoid to ellipsoid, usually constricted in middle part, dark red-brown to almost black, germ pore central; basidia dimorphic; cheilocystidia globose, subglobose, utriform, ellipsoid or broad lageniform; pleurocystidia similar to cheilocystidia; sclerocystidia present.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
46CC4C4EBAA751C9ACFA9DC9953C88C8.taxon	description	Description. Pileus 8 – 12 × 5 – 10 mm when still closed, 12 – 19 mm when mature, at first conical to convex, finally become flat, with glabrous disc at center, sometimes slightly depresses; dry; sordid yellow to cinnamon with grayish hue when young, orange-brown to chestnut-color at center, brown-gray to gray at margin when aged; fine sulcate-striate up to center. Context thin, pale gray to gray, odor and taste not distinctive. Lamellae crowded, almost free to free, 1 – 2 mm in wide, L = 30 – 41, I = 0 or 1, initially pale gray then become gray to dark gray when mature, more pale at margin; hardly deliquescent. Stipe 49 – 61 × 2 – 3 mm, cylindrical, hollow, almost equal, pale gray and with somewhat brown hue at base, subglabrous with sparse tiny hairs, clavate. Spore print without recording. Basidiospores [42, 3, 2] (9.6 –) 10.7 – 11.4 (– 13.2) × (7.6 –) 8.8 – 9.1 (– 9.8) × (6.1 –) 6.4 – 6.9 (– 7.5) μm, Q 1 = 1.07 – 1.42, Q 2 = 1.36 – 1.59, av. Q 1 = 1.24, av. Q 2 = 1.47; broad ellipsoid to ellipsoid, or mitriform, usually constricted in middle part, with apical papilla and convex base in front view, slightly flattened, ellipsoid in side view; smooth, dark red-brown to almost black; inamyloid; germ pore central, 2.5 – 3.1 μm wide. Basidia dimorphic, 20 – 32 × 11 – 12 μm, sterigma 3 – 6 μm in length, clavate, hyaline, 4 - or 2 - spored, surrounded with 4 – 6 pseudoparaphyses; subhymenium composed of ellipsoid, oblong or cylindrical elements, 18 – 28 × 10 – 18 μm. Cheilocystidia 20 – 70 × 11 – 26 μm, globose, subglobose, utriform, ellipsoid or broad lageniform, smooth, colorless, thin-walled. Pleurocystidia 15 – 60 × 11 – 25 μm, similar to cheilocystidia. Lamella trama regular, 3 – 13 μm in diam, hyaline, colorless, thin-walled. Pileipellis a hymeniderm at yellow-brown sulcate, made up of sphaeropedunculate cells, 19 – 43 × 11 – 21 μm, hyaline, with brown hue at base in most cases; other part of pileus with brown-gray hue a cutis, made up of hyaline, brown to brown-gray, 3 – 8 μm in diam; pileus trama hyphae densely interwoven, thin-walled, hyaline, yellow-brown to brown, 4 – 17 μm wide; sclerocystidia 29 – 161 × 6 – 9 μm, yellow-brown, thick-walled, wall 1.4 – 2.8 μm in thickness. Caulopellis hyphae parallel, 4 – 9 μm wide, hyaline, thin-walled, sometimes diverticulate; caulocystidia unseen, however, clustered tiny hairs at stipe pellis; hyphae of stipe trama 9 – 21 μm wide, colorless, thin-walled. Clamp connection present at all tissues.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
5ADBA7E1487A5F3DBAF2CC3F2A34F543.taxon	description	Figs 6 f – k, 7	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
5ADBA7E1487A5F3DBAF2CC3F2A34F543.taxon	etymology	Etymology. The specific epithet refers to the obscure sulcate-striate pileus of this species.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
5ADBA7E1487A5F3DBAF2CC3F2A34F543.taxon	diagnosis	Diagnosis. Basidiocarps psathyrelloid; pileus conico-convex to paraboloid when mature, sometimes with obvious papilla, lacteous to pale brown-gray, somewhat yellow-brown at center, surface subglabrous to uneven, mainly with obscure sulcate-striate up to 1 / 3 to 1 / 2 part from margin to center; lamellae adnate; stipes glabrous with clavate base; basidiospores 10.3 – 10.7 × 7.3 – 7.6 × 6.4 – 7.0 μm, ellipsoid or ovoid in front view and ellipsoid to oblong in side view, germ pore central or slightly eccentric, 1.8 – 3.3 μm wide; basidia monomorphics, with relatively long sterigma which is up to 8 μm; sclerocystidia present; caulocystidia present, mostly sublageniform or subcylindrical.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
5ADBA7E1487A5F3DBAF2CC3F2A34F543.taxon	description	Description. Basidiocarps small, psathyrelloid, not collapsing. Pileus 6 – 7 × 6 – 8 mm at young stage, 10 – 18 mm when mature, at first conical, finally conico-convex to paraboloid and never flattened, sometimes with obvious papilla; dry; sordid yellow to light cinnamon when young, lacteous to pale brown-gray, somewhat yellow-brown at center when age; surface subglabrous to uneven, sometimes with obscure sulcate-striate up to 1 / 3 to 1 / 2 part from margin to center. Context thin, white to pale gray, odor and taste not distinctive. Lamellae crowded, adnate, 1 – 3 mm in wide, L = 32 – 39, I = 1 or 3, initially pale gray then become brown gray with somewhat olivaceous hue and finally purple gray or dark gray when mature, more pale at margin; not deliquescent. Stipe 31 – 74 × 1 – 2 mm, cylindrical, hollow, equal or attenuate towards the apex, white to sordid yellow, glabrous, clavate and without white hairs at base of stipes. Spore print not recording. Basidiospores [49, 4, 3] (9.3 –) 10.3 – 10.7 (– 11.4) × (6.6 –) 7.3 – 7.6 (– 8.2) × (5.8 –) 6.4 – 7.0 (– 7.2) μm (10.5 × 7.4 × 6.7 μm in average), Q 1 = 1.29 – 1.51, Q 2 = 1.46 – 1.80, av. Q 1 = 1.41, av. Q 2 = 1.58; ellipsoid or ovoid in front view and ellipsoid to oblong in side view, with apical papilla, with conical base and truncate apex, smooth, dark yellow-brown to almost black; inamyloid; germ pore central or slightly eccentric, 1.8 – 3.3 μm wide. Basidia monomorphics, 20 – 37 × 8 – 13 μm, with relatively long sterigma which up to 8 μm, clavate, hyaline, 4 - or 2 - spored, surrounded with 4 – 6 pseudoparaphyses; subhymenium composed of subglobose, ellipsoid, oblong or cylindrical elements, 8 – 20 × 6 – 16 μm. Cheilocystidia abundant, 26 – 76 × 15 – 28 μm, subglobose, utriform, ellipsoid or sublageniform, smooth, colorless, thin-walled. Pleurocystidia relatively rare, when present, 41 – 79 × 11 – 32 μm, broad utriform, sublageniform or (sub) cylindrical. Lamella trama regular, 3 – 12 μm wide, hyaline, colorless, thin-walled. Pileipellis a hymeniderm mainly made up of sphaeropedunculate cells with inconspicuous short pedicels, 20 – 43 × 14 – 21 μm, hyaline, with brown hue at base in most cases, mixed with sclerocystidia; sclerocystidia 28 – 159 × 4 – 6 μm, yellow-brown, thick-walled; pileus trama hyphae densely interwoven, thin-walled, hyaline, dark yellow to yellow-brown, 4 – 6 μm wide. Caulopellis hyphae parallel, 4 – 9 μm wide, hyaline, thin-walled, slightly diverticulate; hyphae of stipe trama 9 – 21 μm wide, colorless, thin-walled; caulocystidia present at upper part of stipe, 30 – 53 × 11 – 16 μm, mostly in cylindrical or broad lageniform, 16 – 21 × 11 – 16 μm, sometimes subglobose to ellipsoid, hyaline, thin-walled. Clamp connection abundant, pseudoclamp also present.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
056F140AABE15C4DB9E3D90BD099814D.taxon	description	Figs 17 a – f, 18	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
056F140AABE15C4DB9E3D90BD099814D.taxon	diagnosis	Diagnosis. Pileus lacteous, pale gray to gray at margin, sordid yellow to slightly ochreous in center, sulcate-striate almost up to center, ridge of plication fine grained; lamellae free and remote from stipe by pseudocollarium; basidiospores 9.7 – 10.9 × 10.0 – 10.4 × 8.4 – 9.4 μm, rhomboid or mitriform in front view, ellipsoid to narrow ellipsoid in side view, with slightly eccentric or almost central germ pore of 1.8 – 2.1 μm in diam; sclerocystidia absent.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
056F140AABE15C4DB9E3D90BD099814D.taxon	etymology	Etymology. The specific epithet “ eburnea ” refers to the white with slightly sordid yellow color of the basidiocarp.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
056F140AABE15C4DB9E3D90BD099814D.taxon	description	Description. Pileus 4 – 8 × 5 – 10 mm when still closed, 5 – 13 mm when mature, at first ovoid or ellipsoid, then paraboloid, finally almost flattened, sometime with a depressed disc at center; dry; sordid yellow to slightly ochreous and in center, sometimes with red-brown hue when dry, lacteous, pale gray or gray at margin, slight brown at center at age; sulcate-striate almost up to center, ridge edge fine-grained. Context extremely thin, almost unseen, odor and taste not distinctive. Lamellae medium crowded, free and remote from stipe by pseudocollarium, 1 – 2 mm in wide, L = 19 – 28, I = 1, first white to beige, pale gray to purple-gray when expanded, hardly deliquescent with age. Stipe 15 – 45 × 1 – 2 mm, cylindrical, hollow, equal or attenuate towards the apex, white to gray brown, somewhat translucent when moist, glabrous, at base somewhat swollen. Spore print not recorded. Basidiospores [47, 4, 2] (9.0 –) 9.7 – 10.9 (– 12.1) × (9.0 –) 10.0 – 10.4 (– 11.4) × (7.8 –) 8.4 – 9.4 (– 9.9) μm, Q 1 = 1.16 – 1.40, Q 2 = 1.35 – 1.83, av. Q 1 = 1.30, av. Q 2 = 1.58; rhomboid or mitriform, with apical papilla and convex base in front view, flattened, ellipsoid to narrow ellipsoid in side view; smooth, yellow-brown to dark brown-gray, with yellow-brown oil droplet; inamyloid; germ pore slightly eccentric or almost central, 1.8 – 2.1 μm wide. Basidia dimorphic, 17 – 43 × 8 – 16 μm, sterigma 3 – 6 μm, clavate, occasionally constricted in middle part, hyaline, 4 - or 2 - spored, surrounded with 4 – 6 pseudoparaphyses; subhymenium composed of subglobose, ellipsoid, oblong or cylindrical elements, 8 – 19 × 6 – 14 μm. Cheilocystidia 16 – 52 × 10 – 22 μm, abundant, subglobose, utriform, ellipsoid, sublageniform or subcylindrical, smooth, colorless, thin-walled. Pleurocystidia 32 – 82 × 11 – 32 μm, utriform, ellipsoid, sublageniform or (sub) cylindrical. Lamella trama regular, 3 – 10 μm wide, hyaline, colorless, thin-walled. Pileipellis a hymeniderm at yellow-brown sulcate, mainly made up of sphaeropedunculate cells, sometimes ellipsoid or utriform with inconspicuous short pedicels, 21 – 46 × 13 – 22 μm, hyaline, with brown hue at base in most cases; other part of pileus with gray hue a cutis, made up of hyaline, almost colorless hyphae, 6 – 8 μm; pileus trama hyphae densely interwoven, thin-walled, hyaline, yellow-brown to brown, 3 – 8 μm wide. Sclerocystidia absent. Caulopellis hyphae parallel, 3 – 9 μm wide, hyaline, thin-walled; hyphae of stipe trama 7 – 15 μm wide, colorless, thin-walled or slightly thick-walled; caulocystidia unseen, occasionally seen specialized terminal elements. Clamp connection present.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
C6B001E2835D536790125E72E6EB8902.taxon	description	Figs 8 d – g, 10	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
C6B001E2835D536790125E72E6EB8902.taxon	diagnosis	Diagnosis. Basidiomata relatively large. Pileus pearly white to pale gray at margin and yellow-brown at the center; with annular zone at the junction of the lamellae and stipe, basidiospores 9.3 – 10.1 × 7.7 – 8.0 × 6.3 – 6.5 μm, broad ellipsoid in front view, brown to dark brown; basidia dimorphic, 4 - spored; cheilocystidia 19 – 77 × 8 – 19 μm, subglobose, utriform, ellipsoid or broad lageniform; pleurocystidia 55 – 80 × 19 – 25 μm, (sub) cylindrical or lageniform; pileipellis a hymeniderm mixed with sphaeropedunculate and clavate cells; sclerocystidia present; clustered tiny hairs at stipipellis.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
C6B001E2835D536790125E72E6EB8902.taxon	etymology	Etymology. The specific epithet “ grisella ” refers the distinct pearly gray color of pileus when mature.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
C6B001E2835D536790125E72E6EB8902.taxon	description	Description. Basidiomata small to medium-sized. Pileus 5 – 9 × 5 – 8 mm when still closed, 14 – 27 mm when mature, at first conical to subglobose, finally become flat, with glabrous disc at center; dry; yellow brown to red brown at first, then fade from edge of pileus, finally become pearly gray except sordid yellow to yellow brown at center; fine sulcate-striate up to center. Context thin, cream to pale gray, odor and taste not distinctive. Lamellae crowded, free, with annular zone at the junction of the lamellae and stipe, 1 – 2 mm in wide, L = 35 – 43, I = 0 – 2, initially pale gray then become gray with olive-green hue, dark gray when mature, more pale at margin; hardly deliquescent. Stipe 43 – 64 × 2 – 3 mm, cylindrical, hollow, almost equal, cream to pale gray, subglabrous with sparse tiny hairs, clavate. Spore print not recorded. Basidiospores [63, 5, 3] (7.7 –) 9.3 – 10.1 (– 10.5) × (6.8 –) 7.7 – 8.0 (– 8.4) × (5.8 –) 6.3 – 6.5 (– 6.7) μm, Q 1 = 1.18 – 1.28, Q 2 = 1.26 – 1.56, av. Q 1 = 1.21, av. Q 2 = 1.40; broad ellipsoid, occasionally with 5 - or 6 - rounded angles, with apical papilla and convex base in front view, slightly flattened, narrow ellipsoid to ellipsoid in side view; smooth, brown to dark brown in H 2 O and olive-brown in 5 % KOH; inamyloid; germ pore central, 1.7 – 2.7 μm wide. Basidia bimorphic, 17 – 32 × 8 – 11 μm, sterigma 3 – 6 μm in length, clavate, sometimes constricted in middle part, hyaline, 4 - spored, surrounded with 3 – 5 pseudoparaphyses; subhymenium composed of ellipsoid, oblong or cylindrical elements, 7 – 20 × 8 – 11 μm. Cheilocystidia 19 – 77 × 8 – 19 μm, subglobose, utriform, ellipsoid or broad lageniform, smooth, colorless, thin-walled. Pleurocystidia 55 – 80 × 19 – 25 μm, (sub) cylindrical or lageniform. Lamellar trama regular, 8 – 16 μm in diam, hyaline, colorless, thin-walled. Pileipellis a hymeniderm at sulcate, made up of sphaeropedunculate and clavate cells, 29 – 43 × 9 – 22 μm, hyaline, with brown hue at base in most cases; other part of pileus a cutis, made up of hyaline, colorless or slightly yellow hyphae, 3 – 8 μm in diam; pileus trama hyphae densely interwoven, thin-walled, hyaline, yellow-brown to brown, 6 – 17 μm wide; sclerocystidia 29 – 181 × 5 – 11 μm, yellow-brown, thick-walled, wall 2.5 – 3.2 μm in thickness. Stipitipellis hyphae parallel, 4 – 10 μm wide, hyaline, thin-walled, sometimes diverticulate; caulocystidia unseen, while clustered terminal cells of the stipitipellis protrude from the surface; hyphae of stipe trama 9 – 16 μm wide, colorless, thin-walled. Clamp connections present.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
DBE2DBABED34517AB0843D473D57D369.taxon	description	Figs 17 m – o, 20	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
DBE2DBABED34517AB0843D473D57D369.taxon	description	Description. Pileus 7 – 9 × 9 – 14 mm when still closed, up to 19 mm when mature, at first subglobose or ovoid, expanded pileus conical or occasionally flattened; dry; ochreous to red-brown at center, especially when young, usually with shades of gray at margin; at first with distinct longitudinal ridge at center, sulcate-striate up to 3 / 4 part from margin to center at age, sometimes with cracking edge. Context extremely thin, almost unseen in membrane part of pileus, whitish, young transparent light yellow or slightly brown-gray, brittle, odor and taste not distinctive. Lamellae rather crowded, free, 1 – 3 mm in wide, L = 46 – 53, I = 0 or 1, first white to beige, then become pale gray, brown-gray or gray, hardly deliquescent with age. Stipe 46 – 105 × 2 mm, cylindrical, hollow, almost equal or attenuate towards the apex, sordid white or cream, with brown or ochreous hue at bottom of stipe, glabrous; with white tomentose at base. Spore print not recorded. Basidiospores (8.5 –) 9.3 – 10.5 (– 12.9) × (7.4 –) 7.9 – 8.7 (– 10.5) × (6.3 –) 6.5 – 6.9 (– 7.5) μm, Q 1 = 1.15 – 1.29, Q 2 = 1.30 – 1.52, av. Q 1 = 1.21, av. Q 2 = 1.44; strongly lentiform, round-angled triangular, rhomboid, ovoid or mitriform, usually with apical papilla and convex base in face view, ellipsoid to narrow ellipsoid in side view; smooth, yellow-brown to brown-black in water and red-brown in 5 % KOH, with yellow-brown oil droplet; inamyloid; germ pore eccentric, 1.7 – 2.8 μm in wide. Basidia dimorphic, 18 – 36 × 8 – 10 μm, with brachybasidia which are up to 15 μm in length, sterigma 3 – 6 μm, clavate, sometimes constricted in middle part, hyaline, 4 - or 2 - spored, surrounded with 4 – 7 pseudoparaphyses; subhymenium composed of ellipsoid, oblong or cylindrical elements, 12 – 28 × 8 – 17 μm. Cheilocystidia 33 – 55 × 14 – 23 μm, abundant, ellipsoid, fusiform or sublageniform, sometimes with a capitate apex, rarely globose, smooth, colorless, thin-walled. Pleurocystidia 46 – 76 × 17 – 33 μm, sublageniform or (sub) cylindrical, usually constricted in middle part. Lamella trama regular, 10 – 19 μm wide, hyaline, colorless, thin-walled. Pileipellis a hymeniderm at yellow-brown sulcate, mainly made up of clavate cells or rarely sphaeropedunculate cells, 25 – 43 × 13 – 18 μm, hyaline, with brown hue at base in most cases; other part of pileus with gray hue a cutis, made up of hyaline, almost colorless hyphae, 5 – 11 μm; pileus trama hyphae densely interwoven, thin-walled, hyaline, yellow-brown to brown, 3 – 7 μm wide. Sclerocystidia absent. Stipipellis hyphae parallel, 3 – 7 μm wide, hyaline, thin-walled, often diverticulate; hyphae of stipe trama 11 – 24 μm wide, colorless, thin-walled; caulocystidia unseen. Clamp-connection and pseudoclamps present.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
6DE436BECA815A8BB7A8540F80167BA2.taxon	description	Figs 8 m – o, 11	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
6DE436BECA815A8BB7A8540F80167BA2.taxon	description	Description. Pileus 7 – 10 × 4 – 8 mm when still closed, 8 – 12 mm when mature, at first ovoid or ellipsoid, expanded pileus conical to flattened; dry; sordid yellow, ochreous to red brown at center, gray or pale gray at margin, sometimes with slightly brown hue; sulcate-striate up to center. Context extremely thin, almost unseen in membrane part of pileus, white to pale gray, odor and taste not distinctive. Lamellae crowded, free and remote from stipe, with a circular empty space which is visible around the apex of the stipe, 1 – 2 mm in wide, L = 35 – 41, I = 1 – 2, first white to beige, then become purple gray to dark gray, hardly deliquescent with age. Stipe 20 – 51 × 1 – 2 mm, cylindrical, hollow, equal or attenuate towards the apex, white, glabrous; with white tomentose at base. Spore print not recorded. Basidiospores [40, 2, 1] (14.6 –) 14.9 – 16.3 (– 17.1) × (9.3 –) 10.6 – 11.4 (– 12.6) × (10.1 –) 10.4 – 11.2 (– 12.2) μm, Q 1 = 1.24 – 1.59, Q 2 = 1.31 – 1.68, av. Q 1 = 1.39, av. Q 2 = 1.46; ellipsoid, with apical papilla and convex base in front view, ellipsoid in side view; smooth, dark brown to almost black, with olive-brown oil droplet; inamyloid; germ pore central, 2.6 – 4.9 μm wide. Basidia dimorphic, 22 – 43 × 9 – 12 μm (in average 33 × 15 μm), sterigma 3 – 7 μm, clavate, sometimes constricted in middle part, hyaline, 4 - spored, surrounded with 5 – 8 pseudoparaphyses; subhymenium composed of subglobose, ellipsoid, oblong or cylindrical elements. Cheilocystidia 34 – 53 × 23 – 34 μm, abundant, ellipsoid or sublageniform, smooth, colorless, thin-walled. Pleurocystidia rare, if present, (sub) cylindrical, 56 – 81 × 15 – 22 μm, colorless, thin-walled. Lamella trama regular, 3 – 9 μm wide, hyaline, colorless, thin-walled. Pileipellis a hymeniderm, made up of sphaeropedunculate and clavate cells, 21 – 44 × 9 – 23 μm, hyaline, most with brown hue at base; pileus trama hyphae densely interwoven, thin-walled or slightly thick-walled, hyaline, yellow-brown to brown, 3 – 7 μm wide; sclerocystidia present, 34 – 135 × 4 – 7 μm, yellow-brown to brown, thick-walled, wall 1.4 – 2.8 μm in thickness. Stipipellis hyphae parallel, 2 – 6 μm wide, hyaline, thin-walled, sometimes with short branches; hyphae of stipe trama 8 – 18 μm wide, colorless, thin-walled; caulocystidia unseen. Clamp connection abundant.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
F316F3B011115E0CB365A71384005FA3.taxon	description	Figs 12 o, 16	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
F316F3B011115E0CB365A71384005FA3.taxon	description	Description. Pileus 8 – 11 × 6 – 9 mm when still closed, 15 – 18 mm when mature, at first semiglobose to mitriform, expanded pileus conical to flattened, mostly with a depressing disc at center; dry; ochreous to dark yellow-brown at center, surrounded with a water-soaked circulus, pale brown-gray at margin, dark yellow-brown at ridge of plication; sulcate-striate up to center. Context extremely thin, almost unseen in membrane part of pileus, cream to sordid yellow, odor and taste not distinctive. Lamellae crowded, free and remote from stipe, with a circular empty space which is visible around the apex of the stipe, 1 mm in wide, L = 35 – 42, I = 0 or 1, first pale-yellow gray then become gray to purple-gray, or dark gray; hardly deliquescent with age. Stipe 48 – 71 × 2 – 3 mm, cylindrical, hollow, equal or slightly attenuate towards the apex, cream and darker at base, glabrous. Spore print not recorded. Basidiospores [37, 2, 1] (13.1 –) 14.4 – 15.1 (– 16.3) × (9.3 –) 10.1 – 10.5 (– 11.9) × (8.3 –) 8.8 – 9.5 (– 9.7) μm, Q 1 = 1.28 – 1.55, Q 2 = 1.59 – 1.61, av. Q 1 = 1.43, av. Q 2 = 1.60; ellipsoid, with apical papilla and convex base in front view, narrow ellipsoid in side view; smooth, dark brown to almost black; inamyloid; germ pore central, 2.0 – 2.9 μm wide. Basidia dimorphic, 17 – 44 × 11 – 15 μm (in average 32 × 13 μm), sterigma 4 – 6 μm, clavate, sometimes constricted in middle part, hyaline, 4 - spored, surrounded with 5 – 7 pseudoparaphyses; subhymenium yellow brown, composed of subglobose, ellipsoid, oblong or cylindrical elements. Cheilocystidia 25 – 55 × 23 – 34 μm, abundant, subglobose, utriform, ellipsoid or sublageniform, smooth, colorless, thin-walled. Pleurocystidia very rare, when present 49 – 75 × 22 – 26 μm, oblong to cylindrical, smooth, colorless, thin-walled. Lamella trama regular, 6 – 10 μm wide, hyaline, colorless, thin-walled. Pileipellis a hymeniderm, made up of sphaeropedunculate and clavate cells, 30 – 43 × 13 – 21 μm, hyaline, with yellow-brown hue at base; pileus trama hyphae densely interwoven, thin-walled or slightly thick-walled, hyaline, yellow-brown, 5 – 8 μm wide; sclerocystidia absent. Stipipellis hyphae parallel, 4 – 8 μm wide, hyaline, thin-walled, occasionally with short branches; hyphae of stipe trama 9 – 20 μm wide, colorless, thin-walled; caulocystidia unseen. Clamp connection present.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
978B5B39E4A5585391B0CCC19486878C.taxon	description	Figs 12 g – l, 15	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
978B5B39E4A5585391B0CCC19486878C.taxon	diagnosis	Diagnosis. Pileus light yellow-brown at margin and orange-brown in center when young, light gray-brown and with a bright orange-brown center when mature; stipe white to pale gray at upper part, light brown at lower part; basidiospores 7.4 – 8.1 × 5.8 – 6.1 × 5.0 – 5.4 μm, most in ovoid, mitriform, ellipsoid or limoniform in front view, flattened, ellipsoid to narrow ellipsoid in side view, dark olive-brown to almost black; germ pore slightly eccentric; basidia dimorphic, 16 – 31 × 5 – 9 μm, 4 - spored; cheilocystidia 25 – 54 × 10 – 26 μm, abundant, utriform, broad ellipsoid or broad lageniform, sometimes apically mastoid; pleurocystidia 37 – 100 × 13 – 27 μm, sublageniform or (sub) cylindrical; pileipellis a hymeniderm at yellow-brown sulcate, mainly made up of ellipsoid or clavate cells, sometimes subglobose or utriform with short pedicels; sclerocystidia absent; some terminal elements of caulopellis hyphae obtuse, attenuated or cystidioid.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
978B5B39E4A5585391B0CCC19486878C.taxon	etymology	Etymology. The epithet “ neoplicatilis ” means that this species has similar morphological characteristics and close genetic relationship with P. plicatilis.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
978B5B39E4A5585391B0CCC19486878C.taxon	description	Description. Pileus 4 – 6 × 6 – 9 mm when still closed, 11 – 15 mm when mature, at first mitriform or ellipsoid, finally almost flattened, sometimes with a conspicuous depressed disc at center; dry; light yellow-brown at margin and orange-brown in center when young, light gray at margin and with a bright orange-brown center at age, sometimes with water-soaking texture; sulcate-striate almost up to center. Context extremely thin, brown in center and almost unseen at margin, odor and taste not distinctive. Lamellae crowded, free and remote from stipe by pseudocollarium, 1 mm in wide, L = 31 – 40, I = 0 or 1, first white to beige, pale brown-gray when expanded; hardly deliquescing with age. Stipe 48 – 67 × 2 mm, cylindrical, hollow, equal or attenuate towards the apex, slender, white to pale gray at upper part, light brown at lower part, white to cream at base, glabrous or with sparse tiny hairs. Spore print not recorded. Basidiospores [58, 5, 3] (6.0) 7.4 – 8.1 (9.4) × (4.5) 5.8 – 6.1 (6.7) × (4.3) 5.0 – 5.4 (6.3) μm, Q 1 = 1.09 – 1.51, Q 2 = 1.33 – 1.73, av. Q 1 = 1.28, av. Q 2 = 1.53; most in ovoid, mitriform, ellipsoid or limoniform with apical papilla and convex base in front view, flattened, ellipsoid to narrow ellipsoid in side view; smooth, dark brown to almost black, with yellow-brown oil droplet; inamyloid; germ pore slightly eccentric, 1.3 – 1.7 μm wide. Basidia dimorphics, 16 – 31 × 5 – 9 μm, sterigma 3 – 6 μm, clavate, hyaline, 4 - spored, surrounded with (3) 4 – 7 pseudoparaphyses; subhymenium composed of subglobose, ellipsoid, oblong or cylindrical elements, 9 – 21 × 4 – 7 μm. Cheilocystidia 25 – 54 × 10 – 26 μm, abundant, utriform, broad ellipsoid or broad lageniform, sometimes apically mastoid, smooth, colorless, thin-walled. Pleurocystidia 37 – 100 × 13 – 27 μm, sublageniform or (sub) cylindrical. Lamella trama regular, 5 – 12 μm wide, hyaline, colorless, thin-walled. Pileipellis a hymeniderm at yellow-brown sulcate, mainly made up of ellipsoid or clavate cells, sometimes subglobose or utriform with short pedicels, 34 – 59 × 11 – 23 μm, hyaline, with brown hue at base; other part of pileus with gray hue a cutis, made up of hyaline, colorless to light brown, 4 – 9 μm; context at pilei center composed of densely interwoven hyphae, thin-walled, hyaline, yellow brown to brown, 7 – 14 μm wide. Sclerocystidia absent. Caulopellis hyphae parallel, 4 – 13 μm wide, hyaline, thin-walled, often diverticulate; hyphae of stipe trama 9 – 20 μm wide, colorless, thin-walled; caulocystidia unseen but some terminal elements of caulopellis hyphae obtuse, attenuated or cystidioid. Clamp connection and pseudoclamp present.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
97A2433559CE5DE8A7D6D693612E122B.taxon	description	Figs 17 g – l, 19	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
97A2433559CE5DE8A7D6D693612E122B.taxon	diagnosis	Diagnosis. Pileus lacteous to cream at margin, light brown at center; basidiospores 11.0 – 11.7 × 11.3 – 11.8 × 6.9 – 7.4 μm, with variable shapes, ranging from triangular, pentangular to heart-shape in front view, sometimes with two germ pore, yellow-brown or olive-brown; basidia dimorphic, 2 - spored; cheilocystidia 25 – 47 × 9 – 22 μm, utriform, ellipsoid, sublageniform, fusiform or clavate; pleurocystidia 40 – 65 × 13 – 26 μm, ellipsoid or sublageniform; pileipellis a hymeniderm mixed with clavate and ellipsoid cells; sclerocystidia absent.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
97A2433559CE5DE8A7D6D693612E122B.taxon	etymology	Etymology. The specific epithet “ orientolactea ” is combined with “ oriento ” (eastern) which refers the occurrence of the new species in the Far East and “ lactea ” meaning the close affinity to Parasola lactea.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
97A2433559CE5DE8A7D6D693612E122B.taxon	description	Description. Pileus 4 – 7 × 5 – 9 mm when still closed, 8 – 13 mm when mature, at first ovoid or ellipsoid, finally almost flattened, often with a depressed disc at center; dry; lacteous to cream at margin and sometimes with brown hue in center when young, pale gray at age, sometimes with water-soaking texture; sulcate-striate almost up to center. Context extremely thin, almost unseen, odor and taste not distinctive. Lamellae medium crowded, free and remote from stipe by pseudocollarium, 1 – 2 mm in wide, L = 26 – 39, I = 0 or 1, first white to beige, pale gray to purple-gray when expanded; hardly deliquescent with age. Stipe 35 – 81 × 1 – 2 mm, cylindrical, hollow, equal or attenuate towards the apex, white to pale gray, glabrous. Spore print without being recorded. Basidiospores [64, 5, 3] (10.2 –) 11.0 – 11.7 (– 14.6) × (10.6 –) 11.3 – 11.8 (– 13.7) × (6.0 –) 6.9 – 7.4 (– 8.1) μm, Q 1 = 0.92 – 1.07, Q 2 = 1.45 – 1.86, av. Q 1 = 0.98, av. Q 2 = 1.64; mostly in triangular, pentangular or heart-shape with apical papilla and convex base and occasionally in broad heart-shape or subrectangle when with two germ pore in front view, flattened, ellipsoid to narrow ellipsoid or narrow fabiform in side view; smooth, yellow-brown or olive-brown, with yellow-brown oil droplet; inamyloid; germ pore eccentric, 2.3 – 4.3 μm wide. Basidia dimorphic, 15 – 30 × 9 – 12 μm, sterigma 4 – 8 μm, clavate, occasionally constricted in middle part, hyaline, 2 - spored, surrounded with 4 – 6 pseudoparaphyses; subhymenium composed of subglobose, ellipsoid, oblong or cylindrical elements, 7 – 21 × 8 – 16 μm. Cheilocystidia 25 – 47 × 9 – 22 μm, abundant, utriform, ellipsoid, sublageniform, fusiform or clavate, smooth, colorless, thin-walled. Pleurocystidia 40 – 65 × 13 – 26 μm, ellipsoid or sublageniform. Lamella trama regular, 4 – 12 μm wide, hyaline, colorless, thin-walled. Pileipellis a hymeniderm at yellow-brown sulcate, mainly made up of clavate cells, sometimes ellipsoid or utriform with inconspicuous short pedicels, 35 – 64 × 10 – 19 μm, hyaline, sometimes with light-brown hue at base; other part of pileus with gray hue a cutis, made up of hyaline, almost colorless hyphae, 4 – 10 μm; pileus trama hyphae densely interwoven, thin-walled, hyaline, colorless or with pale brown hue, 6 – 8 μm wide. Sclerocystidia absent. Stipipellis hyphae parallel, 3 – 6 μm wide, hyaline, thin-walled, often diverticulate; hyphae of stipe trama 8 – 21 μm wide, colorless, thin-walled; caulocystidia absent. Clamp connection and pseudoclamp present.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
4BA75A4DDEFC5241B28B40B54D07A1C5.taxon	description	Description. Basidiomata small to medium-sized, most terrestrial, sometimes fimicolous or lignicolous. Pileus radially sulcate or almost glabrous, veil absent, sometimes with brown hair, center with depressing disc or not. Lamellae adnate or free, withering or partial deliquescent at age. Stipes hollow, most glabrous. Basidiospores flattened or not, subglobose, ellipsoid, ovoid, rounded subtriangular, rhombic, subpentangular, hexagonal in front view, ellipsoid or lentiform in side view, germ pore central or eccentric. Basidia monomorphic or dimorphic, usually 4 - spored, occasionally 2 - spored. Lamellae trama regular, colorless or in brown hue. Lamellae margin infertile, cheilocystidia abundant, subglobose, utriform, ellipsoid, sublageniform or subcylindrical. Pleurocystidia are mainly present, subglobose, utriform, sublageniform or subcylindrical. Original pileipellis a hymeniform, secondary pileipellis is a subcutis when present. Caulocystidia is only present at the upper part of stipes. Clamps present and sometimes present pseudoclamps. Two sections in Parasola are inferred based on molecular data, scoring of macro- and micro-morphological traits (Fig. 5). Macromorphologically, consistent characters supporting the two sections include the pileus shape and the lamellae-stipe attachment type, while micromorphologically diagnostic features encompass the presence or absence of secondary pileipillis, and the basidia morphological type.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
B9B7E4645C9055C49A3E5E49E73E2C8A.taxon	description	Figs 12 a – c, 13	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
B9B7E4645C9055C49A3E5E49E73E2C8A.taxon	diagnosis	Diagnosis. Basidiomata tiny-sized. Pileus less than 10 mm in diameter, orange-brown in center, often with a conspicuous depressed disc; stipe white to pale gray at upper part, brown to sandy beige at lower part, sometimes translucent; basidiospores 9.7 – 10.1 × 7.9 – 8.2 × 6.1 – 6.6 μm, most in ovoid, ellipsoid or limoniform in front view, flattened, ellipsoid to narrow ellipsoid in side view, dark olive-brown to almost black; basidia dimorphic, 4 - spored; lamella trama dark olive-brown; cheilocystidia 18 – 49 × 11 – 24 μm, utriform, ellipsoid or fusiform; pleurocystidia 38 – 77 × 16 – 26 μm, sublageniform or (sub) cylindrical; pileipellis a hymeniderm at yellow-brown sulcate, mainly made up of ellipsoid or clavate cells, sometimes subglobose or utriform with short pedicels; sclerocystidia absent.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
B9B7E4645C9055C49A3E5E49E73E2C8A.taxon	etymology	Etymology. The epithet “ tenuissima ” refers to the slender basidiocarps of this species.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
B9B7E4645C9055C49A3E5E49E73E2C8A.taxon	description	Description. Basidiomata tiny-sized. Pileus 4 – 6 × 7 – 10 mm when still closed, 8 – 10 mm when mature, at first ovoid or ellipsoid, finally almost flattened, often with a conspicuous depressed disc at center; dry; cream to light yellow-brown at margin and orange-brown in center when young, pale gray but always with brown hue at age, sometimes with water-soaking texture; sulcate-striate almost up to center. Context extremely thin, pale brown or almost unseen, odor and taste not distinctive. Lamellae medium crowded, free and remote from stipe by pseudocollarium, 1 mm in wide, L = 27 – 32, I = 0 or 1, first white to beige, pale gray when expanded; hardly deliquescent with age. Stipe 35 – 51 × 1 – 2 mm, cylindrical, hollow, equal or attenuate towards the apex, slender, white to pale gray at upper part, brown to sandy beige at lower part, sometimes translucent, glabrous. Spore print not recorded. Basidiospores [50, 4, 3] (8.9 –) 9.7 – 10.1 (– 12.2) × (7.4 –) 7.9 – 8.2 (– 9.2) × (5.9 –) 6.1 – 6.6 (– 6.7) μm, Q 1 = 1.10 – 1.47, Q 2 = 1.41 – 1.75, av. Q 1 = 1.25, av. Q 2 = 1.53; most in ovoid, ellipsoid or limoniform in front view, with apical papilla and convex base, flattened, ellipsoid to oblong in side view; smooth, dark olive-brown, dark red-brown to almost black, with yellow-brown oil droplet; inamyloid; germ pore eccentric, 1.5 – 2.5 μm wide. Basidia dimorphic, 17 – 36 × 8 – 13 μm, sterigma 4 – 7 μm, clavate, occasionally constricted in middle part, hyaline, 4 - spored, surrounded with 4 – 6 pseudoparaphyses; obvious subhymenium unseen. Cheilocystidia abundant, 18 – 49 × 11 – 24 μm, utriform, ellipsoid or fusiform, smooth, colorless, thin-walled. Pleurocystidia 38 – 77 × 16 – 26 μm, sublageniform or (sub) cylindrical, colorless, thin-walled. Lamellar trama regular, 4 – 7 μm wide, hyaline, dark olive-brown, thin-walled. Pileipellis a hymeniderm at yellow-brown sulcate, mainly made up of clavate cells, sometimes subglobose or utriform with short pedicels, 16 – 42 × 11 – 23 μm, hyaline, with brown hue at base; other part of pileus with gray hue a cutis, made up of hyaline, colorless to light brown, 2 – 3 μm; pileus trama hyphae slightly interwoven, thin-walled, hyaline, yellow-brown to yellow, 4 – 7 μm wide. Sclerocystidia absent. Caulopellis hyphae parallel, 2 – 7 μm wide, hyaline, thin-walled, often short-diverticulate; hyphae of stipe trama 10 – 16 μm wide, colorless, thin-walled; caulocystidia unseen. Clamp connection and pseudoclamp present.	en	Zhu, LiYang, Bau, Tolgor (2025): Emendation of morphology and infrageneric standards of Parasola (Psathyrellaceae, Agaricales) and its species diversity in China. IMA Fungus 16: e 143796, DOI: 10.3897/imafungus.16.143796
