taxonID	type	description	language	source
9D5CF2E7A99B584C95DD68BE40CBA634.taxon	description	Figs 2, 3, 4, 5	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
9D5CF2E7A99B584C95DD68BE40CBA634.taxon	diagnosis	Diagnosis. Pileus brown. Lamellae densely covered with dark brown dots, margin brown. Cheilocystidia, pleurocystidia, caulocystidia and terminal cells of stipitipellis with brownish contents. Differ from M. lammiensis by wider basidiospores (width> 4 μm) and fusiform caulocystidia.	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
9D5CF2E7A99B584C95DD68BE40CBA634.taxon	etymology	Etymology. Name refers to the cheilocystidia, pleurocystidia, and caulocystidia with brown contents.	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
9D5CF2E7A99B584C95DD68BE40CBA634.taxon	description	Description. Pileus 10 – 36 mm in diam., plano-convex, with slightly umbo at center, margin revolute, wavy, cracked at mature; * Drab (XLVI 17 ′′′′) at center, gradually towards margin to PaMid Vinaceous-Drab (XLV 5 ′′′′ f), Pale Drab-Gray (XLVI 17 ′′′′ f) to * Drab-Gray (XLVI 17 ′′′′ d), margin * Drab (XLVI 17 ′′′′); striate * Hair Brown (XLVI 17 ′′′′ i), towards the center up to 1 / 2 – 2 / 3 diam .. Context White (LIII), 1.0 mm thick, fragile. Lamellae subdecurrent, 23 – 27 reaching the stipe, 1 – 3 tiers of lamellulae, White (LIII), densely covered with Deep Brownish Drab (XLV 9 ′′′′ i) dots, irregularly intervenose, stretching downward to 2 / 3 – 3 / 4 of the width of lamellae, edge entirely Deep Brownish Drab (XLV 9 ′′′′ i), wavy. Stipe 24 – 44 × 2 – 4 mm, central, cylindrical; apex to middle * Smoke Gray (XLVI 21 ′′′′ d) to Pale Smoke Gray (XLVI 21 ′′′′ f), base * Ecru-Drab (XLVI 13 ′′′′ d) to * Drab-Gray (XLVI 17 ′′′′ d), hollow, fragile, apex with Light Drab (XLVI 17 ′′′′ b) to * Drab (XLVI 17 ′′′′) striates, sparse White (LIII) pubescent at base. Odor and taste not distinctive. Basidiospores (60 / 3 / 2) (5.4) 5.6 – 6.3 – 6.9 (7.1) × (2.6) 2.9 – 3.2 – 3.5 (4.0) μm [Q = (1.72) 1.77 – 2.16 (2.19), Q m = 1.97 ± 0.09] [holotype (40 / 2 / 1) 6.0 – 6.5 – 6.9 (7.1) × 3.0 – 3.2 – 3.5 μm [Q = (1.83) 1.89 – 2.15 (2.18), Q m = 2.00 ± 0.08], narrowly ellipsoid to cylindrical, colorless, smooth (1000 ×), thin-walled, amyloid. Basidia clavate, 16 – 21 × 5 – 7 μm, hyaline, thin-walled, 4 - spored, sterigmata 2 – 3 μm in length. Cheilocystidia fusiform with tapered apices, 36 – 62 × 9 – 14 μm (Fig. 3 G – J, Fig. 4 D 1), acicular to lanceolate, 46 – 84 × 10 – 17 μm (Fig. 3 M – P, Fig. 4 D 2), with brownish contents, thin-walled, smooth. Pleurocystidia similar to cheilocystidia, 39 – 72 × 8 – 15 μm, with brownish contents, thin-walled, smooth. Pileipellis a cutis composed of cylindrical cells, 32 – 121 × 3 – 6 μm, smooth, thin-walled; terminal cells cylindrical, apex tapering, 34 – 87 μm in length, apex 1 – 3 μm, base 3 – 7 μm, thin-walled, hyaline. Hypodermium formed by fusiform to subglobose hyphae, 20 – 72 × 12 – 39 μm, thin-walled, hyaline. Lamellar trama subregular, dextrinoid. Stipitipellis a cutis composed of cylindrical hyphae, 9 – 18 μm in diam., smooth, thin-walled; terminal cells fusiform or cylindrical, apex tapering, 31 – 72 × 4 – 8 μm, with pale brownish contents, thin-walled, smooth; caulocystidia fusiform, 33 – 70 × 7 – 13 μm, with pale brownish contents, thin-walled, smooth. Clamps present in all tissues.	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
9D5CF2E7A99B584C95DD68BE40CBA634.taxon	distribution	Known distribution. Heilongjiang Province, Jilin Province, China.	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
07E18D409E3A5152B03FA94798B95305.taxon	description	Figs 6, 7, 8	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
07E18D409E3A5152B03FA94798B95305.taxon	diagnosis	Diagnosis. Pileus light pinkish-purple, light brown at center, hygrophanous when old. Cheilocystidia and pleurocystidia fusiform with tapered apices, thin-walled. Differ from M. subulata by lacking pleurocystidia and having acicular to lanceolate, thick-walled cheilocystidia.	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
07E18D409E3A5152B03FA94798B95305.taxon	etymology	Etymology. Name refers to light pinkish-purple pileus.	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
07E18D409E3A5152B03FA94798B95305.taxon	description	Description. Pileus 13 – 22 mm in diam., oblate hemispherical to plano-convex, with slightly depressed at center, margin wavy, occasionally cracked at mature; * Ecru-Drab (XLVI 13 ′′′′ d), Light Drab (XLVI 17 ′′′′ b) to * Drab-Gray (XLVI 17 ′′′′ d) at center, gradually towards margin to Pale Verbena Violet (XXXVI 55 ′′ f), Light Pinkish Lilac (XXXVII 65 ′′ f), Pale Grayish Vinaceous (XXXIX 9 ′′′ f), margin White (LIII); striate Pale Smoke Gray (XLVI 21 ′′′′ f), Pale Ecru-Drab (XLVI 13 ′′′′ f) to * Ecru-Drab (XLVI 13 ′′′′ d), towards the center up to 1 / 3 diam.; surface dry, hygrophanous when old. Context White (LIII), 1.0 mm thick, fragile. Lamellae sinuate to subdecurrent, 21 – 28 reaching the stipe, 1 – 3 tiers of lamellulae, White (LIII), irregularly intervenose, stretching downward to 1 / 3 – 3 / 4 of the width of lamellae, edge concolorous, wavy, serrated. Stipe 32 – 57 × 1 – 4 mm, central, cylindrical; apex Pale Drab-Gray (XLVI 17 ′′′′ f), Pale Vinaceous-Drab (XLV 5 ′′′′ d), Pale Brownish Drab (XLV 9 ′′′′ d), lower part Pale Purple-Drab (XLV 1 ′′′′ d), Light Purple-Drab (XLV 1 ′′′′ b) to * Ecru-Drab (XLVI 13 ′′′′ d), hollow, fragile; sparse White (LIII) pubescent at base. Odor and taste raphanoid. Basidiospores (100 / 5 / 4) (5.6) 5.9 – 6.7 – 7.4 (7.8) × 3.0 – 3.5 – 3.9 (4.1) μm [Q = (1.70) 1.72 – 2.10, Q m = 1.90 ± 0.09] [holotype (40 / 2 / 1) (6.0) 6.2 – 6.7 – 7.4 (7.7) × 3.0 – 3.5 – 3.9 (4.1) μm, Q = (1.71) 1.77 – 2.12, Q m = 1.93 ± 0.11], narrowly ellipsoid to cylindrical, colourless, smooth (1000 ×), thin-walled, amyloid. Basidia clavate, 18 – 31 × 4 – 7 μm, hyaline, thin-walled, 4 - spored, sterigmata 2 – 4 μm in length. Cheilocystidia fusiform, subfusiform, with apices tapered, 35 – 97 × 7 – 18 μm, thin-walled, smooth. Pleurocystidia similar to cheilocystidia, 30 – 80 × 6 – 18 μm, thin-walled, smooth. Pileipellis a cutis composed of cylindrical cells, 29 – 81 × 3 – 11 μm, smooth, thin-walled; terminal cells cylindrical, apex tapering, 20 – 99 μm in length, apex 2 – 4 μm, base 2 – 9 μm, thin-walled, hyaline. Hypodermium formed by fusiform to subglobose hyphae, 20 – 76 × 6 – 37 μm, thin-walled, hyaline. Lamellar trama subregular, dextrinoid. Stipitipellis a cutis composed of cylindrical hyphae, 4 – 17 μm in diam., smooth, thin-walled; caulocystidia fusiform, clavate, sometimes utriform, 23 – 66 × 6 – 20 μm, thin-walled, smooth. Clamps present in all tissues.	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
07E18D409E3A5152B03FA94798B95305.taxon	distribution	Known distribution. Heilongjiang Province, Jilin Province, China.	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
FBB06453D7BB5059B93CE1AA68BD7753.taxon	description	Figs 9, 10, 11	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
FBB06453D7BB5059B93CE1AA68BD7753.taxon	diagnosis	Diagnosis. Pileus light reddish-brown to light grayish-brown, near margin hygrophanous. Pleurocystidia and caulocystidia absent. Differ from M. polycystidiata Z. W. Liu, Y. P. Ge, L. Zou & Q. Na by having pleurocystidia and caulocystidia.	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
FBB06453D7BB5059B93CE1AA68BD7753.taxon	etymology	Etymology. Name refers to the light reddish-brown, light grayish brown to brown pileus.	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
FBB06453D7BB5059B93CE1AA68BD7753.taxon	description	Description. Pileus 17 – 26 mm in diam., hemispherical, plano-convex at mature, margin wavy; Light Drab (XLVI 17 ′′′′ b) at center, gradually towards margin to Light Vinaceous-Fawn (XL 13 ′′′ d), Pale Ecru-Drab (XLVI 13 ′′′′ f) to * Drab-Gray (XLVI 17 ′′′′ d), margin Light Drab (XLVI 17 ′′′′ b) to * Drab (XLVI 17 ′′′′); striate * Drab (XLVI 17 ′′′′), towards the center up to 1 / 8 – 1 / 7 diam.; surface moist, near margin hygrophanous. Context White (LIII), 1.0 mm thick, fragile. Lamellae adnexed or subdecurrent, approximately 38 reaching the stipe, 1 – 3 tiers of lamellulae, White (LIII), irregularly intervenose, stretching downward to 2 / 3 – 3 / 4 of the width of lamellae, edge concolorous, wavy. Stipe 44 – 45 × 2 – 4 mm, central, cylindrical; apex to lower part Vinaceous-Drab (XLV 5 ′′′′), Light Brownish Drab (XLV 9 ′′′′ b) to * Hair brown (XLVI 17 ′′′′ i), base Light Grayish Olive (XLVI 21 ′′′′ b), hollow, fragile; base swollen, sparse White (LIII) pubescent at base. Odor and taste faintly raphanoid. Basidiospores (40 / 2 / 2) (5.1) 6.2 – 7.4 – 8.5 (8.8) × (3.8) 4.0 – 4.6 – 5.5 (5.7) μm [Q = (1.52) 1.55 – 1.84 (1.89), Q m = 1.69 ± 0.10] [holotype (20 / 1 / 1) (6.8) 7.2 – 7.6 – 8.3 (8.5) × (3.8) 4.1 – 4.6 – 4.8 (5.0) μm [Q = 1.60 – 1.81, Q m = 1.70 ± 0.08], ellipsoid to narrowly ellipsoid, colourless, smooth (1000 ×), thin-walled, amyloid. Basidia clavate, 16 – 28 × 5 – 8 μm, hyaline, thin-walled, 4 - spored, sterigmata 2 – 4 μm in length. Cheilocystidia utriform, clavate, 24 – 67 × 8 – 23 μm, thin-walled, smooth. Pleurocystidia absent. Pileipellis a cutis composed of cylindrical cells, 28 – 76 × 5 – 15 μm, smooth, thin-walled; terminal cells cylindrical, apex tapering, 33 – 75 μm in length, apex 2 – 9 μm, base 3 – 11 μm, thin-walled, hyaline. Hypodermium formed by fusiform to subglobose hyphae, 26 – 84 × 11 – 34 μm, thin-walled, hyaline. Lamellar trama subregular, dextrinoid. Stipitipellis a cutis composed of cylindrical hyphae, 6 – 16 μm in diam, smooth, thin-walled; projecting terminal cells cylindrical or fusiform, 31 – 73 × 4 – 9 μm, thin-walled, smooth, hyaline; caulocystidia absent. Clamps present in all tissues.	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
FBB06453D7BB5059B93CE1AA68BD7753.taxon	distribution	Known distribution. Heilongjiang Province, China.	en	Guo, Jingwen, Liu, Zewei, Zeng, Hui, Ge, Yupeng, Na, Qin (2025): Three new species of Mycena sect. Calodontes (Mycenaceae, Agaricales) from Northeastern China. MycoKeys 125: 51-79, DOI: 10.3897/mycokeys.125.169722
