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118. Russula ferruginea Corrales & Vera, sp. nov. (Figs 16A; 17-20) DIAGNOSIS. — R. ferruginea sp. nov. differs from the European R. praetervisa Sarnari or the North American R. amerorecondita Avis & Barajas in the combination of the relatively delicate stature, dark brown pileus centre contrasting to its pale yellowish brown margin, almost mild taste and especially its conspicuous color change from light brown to reddish brown or rusty on wounded places especially apparent on the stipe base and the lamellae. It is defined also by combination of narrow hymenial cystidia up to 8 µm and spores with warts connected by fusions and short fine lines. HOLOTYPE. — Colombia. Cundimarca Depart., Mosquera, Chicaque Natural Reserve, 4°36’22”N, 74°18’17”W, alt. 2130 m, in forest dominated by Quercus humboltii, terrestrial, 17.X.2019, A. Corrales 944 (HUA, SAV). MYCOBANK. — MB 841769. GENBANK. — MZ604288 (ITS), MZ604283 (nrLSU), MZ553923 (rpb2), MZ553926 (tef1 α), all from holotype. ETYMOLOGY. — The name refers to reddish spots on the base of the stipe and colour change of the wounded context from light brown to reddish brown, resembling iron rusting. ADDITIONAL MATERIAL STUDIED. — Colombia. Cundimarca Depart., Mosquera, Chicaque Natural Reserve, 4°36’22”N, 74°18’17”W, alt. 2130 m, in forest dominated by Quercus humboltii, terrestrial, multiple collections of different mycelia distant approximately hundred meters apart, 17.X.2019, A. Corrales 914, A. Corrales 935, A. Corrales 1019 (all deposited in HUA). SPECIMENS STUDIED FOR COMPARISON. — Russula austromontana (Singer B 12402 (F), holotype); Russula cf. austromontana / crucensis: Costa Rica, 3.5 km W of Empalme, 2200 m asl., in montane Quercus seemannii forest, 2.VI.2001, leg. B. Buyck, BB 01.023 (PC); ± 5 km SW of Cerro de la Muerte, Albergue de la Montana, Savegre, 2200 m asl., in montane Quercus seemannii forest, 6.VI.2001, leg. B. Buyck, BB 01.076 (PC). DESCRIPTION Pileus Small to medium sized, 24-48 mm in diam., when young convex, mature plane with depressed centre; margin strongly tuberculate-striate to c. half of the radius (7-13 mm); cuticle slimy especially near the center, shiny, margin peeling or radially cracking, color near margin light brown turning to light yellowish brown or beige, near the center dark brown, deep blackish brown to almost black, discoloring to yellowish brown. Lamellae Moderately distant, c. 8-12/ 1 cm near the pileus margin, 1.5-4 mm broad, pale yellowish-brownish to almost white, lamellulae rare, furcations frequent especially near the stipe, edge even and concolorous. Stipe 28-33 × 5-7.4 mm, cylindrical and staight, longitudinally striate, light brown, darker and with reddish spots at the base, cortex 1-2 mm thick, interior cavernate. Context 2-3 mm thick at the middle of the pileus radius, fragile, light brown, flesh turning reddish brown when cut and getting more red spots at the base when bruised, taste slightly bitter and spicy, odour fishy and fetid. Spore print Not observed. Spores (6.4-)6.8-7.5-8.1(-8.6) × (5.4-)5.7-6.2-6.7(-7) µm, subglobose to broadly ellipsoid Q = (1.07-)1.13-1.21-1.28(-1.34); ornamentation of moderately large, moderately distant [(4- 7(-8) in a 3 µm diam. circle] amyloid, obtuse warts, (0.3)0.4- 0.8(-1) µm high, mainly fused in small groups or short chains ([0-]1-4[-5] fusions in the circle), connected by occasional and usually short line connections ([0-]1-3[-5] in the circle); suprahilar spot not amyloid, relatively large, smooth or covered by few small low warts. Basidia (22-)35-43.7-53 × (5.5-)7-9.2-11(-12) µm, narrowly clavate, ocassionally pedunculate, 4-spored; basidiola cylindrical or clavate, c. 5-9 µm wide. Hymenial cystidia Mostly numerous, c. 1800-2100/mm2, (50-)56-67.8-79(- 86) × 6-7.1-8(-9) µm, mainly fusiform or lancelolate, rarely narrowly langeniform or subcylindrical, apically mainly acute and sometimes pointed, occasionally obtuse, often moniliform, mainly with small, pearl-like, 1-3(-6) µm long appendage, thin-walled; contents weakly heteroformous, with fine, dispersed granulations usually near the apex, sometimes optically empty, often in Congo red with pale yellow pigment, turning almost black in sulfovanillin; near the lamellae edges smaller, (35-)38-48.4-58(-66) × 6-6.8-8µm, similar in shape and contents. Marginal cells Similar to basidiola but smaller, (12-)14-17-20(-21) × 5-6.5- 7.5 µm, cilindrical or clavate, apically obtuse, mixed with occasional basidia. Pileipellis Orthochromatic in Cresyl Blue, sharply delimited from the underlying context, 150-240 µm deep; suprapellis strongly gelatinized, verrucose-bumpy in vertical section, irregularly 15-35 µm deep, composed of more or less repent, loose or clustered hyphae; gradually passing to 120-220 µm thick subpellis formed by loose, gelatinised, irregularly oriented but near trama horizontally oriented, dense, 2-4 µm wide hyphae. Acid-resistant incrustations Absent. Hyphal terminations Near the pileus margin composed mainly of one or two cells, flexuous,thin walled, frequently branched, occasionaly nodulose or angulose; terminal cells (9-)12.5-19.7-27(-34) × 2.5-3.8-5(- 5.5) µm, mainly cylindrical or clavate, often apically obtuse and sometimes slightly narrowed; subterminal cells usually as wide as long, frequently branched or with lateral projections.Hyphal terminations near the pileus centre similar, (12-)14-23.8-33(- 41) × 3-4.3-5(-6) µm, more frequently angulose-nodulose. Pileocystidia Near the pileus margin always 1-celled, subulate, narrowly fusiform or lancelolate, variable in length and often long and originating deep in the subpellis, thin-walled, (24-)29-40.4- 51(-76) × 3-4.2-5 µm, apically mainly acute, with a small appendage or knob; contents dispersed, finely granulous, weakly greying in sulfovanillin. Pileocystidia near the pileus centre similar in shape but usually shorter (22-)28-36.6- 42.5(-47) × (3-)3.6-4.4-5.2(-6.5) µm, more frequently apically constricted than acute, with contents located in diverse places, usually in apical parts. Cystidioid hyphae Dispersed in subpellis but more frequent near the context, sometimes similar to cystidia but longer, contents often more conspicuous, oleipherous and turning dark brown in sulfovanillin and red after carbolfuchsin treatment. Clamp connections Absent from all tissues. NOTES The multilocus phylogenetic reconstruction based on nrLSU, rpb2 and tef1 α (Fig. 5) clearly places our Colombian and Panamanian collections in one monophyletic clade with strong support values concerning bootstrap (MLbs = 100 %) and Bayesian posterior probability (BPP = 1). This clade is recognised in this study on the rank of species as R. ferruginea sp. nov. It belongs to section Ingratae Quél. of the subgenus Heterophyllidinae Romagn. The rusty-spotted North American R. pulverulenta Peck is the sister species of R. ferruginea sp. nov. (MLbs = 61 %, BPP = 0.96), although with poor support. The collection BPL276, labelled as R. pectinatoides Peck, is placed on the higher rank node with moderate support (ML = 68, BI = 0.96). In the ITS analyses (see sample with GenBank accession number KT 933975 in Fig. 6), however, this collection forms part of the species clade of R. amerorecondita. Because sequence data are not yet available for many species of the section Ingratae, our multilocus analysis is undersampled. To trace close relationships and to eliminate coidentity with some taxa published earlier, we analysed also the ITS region based on a set of sequences (Fig. 6) representing the described diversity of American species of the section Ingratae. The topology of this tree is not consistent with the topology obtained in the multilocus analyses and good bootstrap support is usually limited to terminal nodes. Russula ferruginea sp. nov. is placed in a strongly supported clade on a long branch, but there is no support for a more precise placement within the section Ingratae. Colombian and Panamanian collections of the new species received good support (MLbs = 97% and MLbs = 94 % respectively), but they are recognised on the rank of subspecies as discussed below (see comment under subsp. panamensis). The field appearance of R. ferruginea sp. nov. with a relatively fragile stature, dark brown pileus centre contrasting to its pale yellowish brown margin and almost mild taste resembles the European species R. praetervisa or the North American R. amerorecondita. A remarkable feature of R. ferruginea sp. nov. is its conspicuous color change, of the trama becoming reddish brown or rusty on wounded places, especially apparent at the base of the stipe and at the lamellae. This distinct rusty aspect of bruised surfaces is known in several other species of Ingratae such as R. illota Romagn. or R. pulverulenta. With different intensity, however, this color change also occurs in many other species of Ingratae. Among the 78 Russula species described from Latin America (Vera et al. 2021), only some are known from subtropical and tropical montane oak forests and, among these, four are described from Costa Rica as members of the section Ingratae: R. arcyospora Singer, R. austromontan a Singer, R. crucensis Gómez and Alfaro and R. quercusoleoideis Singer et al. Russula arcyospora is similar to R. foetens Romagn. but has odour components of bitter almond and a prominent spore ornamentation composed of high ridges (Singer 1990). Russula austromontana (Singer 1989) is similar to R. ferruginea sp. nov., but has broader hymenial cystidia and more prominent spore ornamentation composed of mostly isolated warts, according to our personal (BB) observations of the type. We sequenced two recent collections collected at or near the type locality in Costa Rica with macroscopical and microscopical characteristics similar to the type collection of R. austromontana. These specimens proved to be unrelated to R. ferruginea sp. nov. in our phylogeny. Russula crucensis, originally classified in sect. Pellicullariae R. Heim subsect. Discopodinae R. Heim, is another member of the section Ingratae (Buyck 1992) and differs from R. ferruginea sp. nov. exactly in the same features as R. austromontana, from which it is difficult to distinguish at this moment. R. quercusoleoideis was originally placed in sect. Ingratae (Singer et al. 1983), but according to Buyck (1992) it is a member of subsect. Griseinae Jul. Schäff. and both, pileipellis structure and hymenial cystidia, are different from the corresponding structures in R. ferruginea sp. nov.

114. Inocybe hebes Eyssart. & Buyck, sp. nov. (Figs 7; 8) DIAGNOSIS. — Resembles Inosperma curvipes, but differs from it in its association with trees from the African miombo woodland, its more vivid brown colours, non spermatic smell, and lageniform often subcapitate cystidia. HOLOTYPE. — Zambia. Near Lusaka, gregarious in miombo woodland, 10.II.1996, Eyssartier 96110, (holo-, P[PC0088772]). INDEX FUNGORUM. — IF558792. GENBANK. — JN974997 (LSU). ETYMOLOGY. — Named after the general form of the cap, from the latin adjective hebes, “blunt, obtuse”. DESCRIPTION Pileus Measuring12-20(25) mm in diam., obtuse conico-campanulate then plano-convex to plane, ochraceous-blond, ochraceous beige to dull brown, sometimes darker at the top, fibrillose to coarsely fibrillose, sometimes with erected squamules around the centre. Lamellae Subhorizontal, not very close to quite distant, (1.5)2-3(4) mm broad, emarginate, pale beige then ochraceous brown, with very slightly pruinose edges. Stipe 20-35(40) × 2-3 mm, slightly broadened at the base up to 5-7 mm, seldom cylindrical but never bulbous, pale beige sometimes with pinkish tinges at the tip, then brownish to dirty brown in the older stages, not pruinose or very finely just under the lamellae. Flesh Pale,sometimes with pinkish tinges in- the upper part of the stipe. Odor Particular, of fresh bread or brioche, sometimes honey-like. Taste Mild. Spores Nodulose, with 5-6(7) obtuse swellings, (7)8-9(10) × (5.5) 6-7(7.5) µm. Paracystidia Clavate, small, 15-25 × 8-10 µm. Cheilocystidia Lageniform often subcapitate, without or with few crystals, (40)45-55(60) × (10)13-15(18)µm, with thickened walls up to 2-3 µm, hyaline in 10% ammonia. Pleurocystidia Cheilocystidia-like, but slightly bigger, up to 75(90)µm long. Pileipellis A cutis of relatively broad hyphae, (5)8-12(15) µm. Pigment incrusting. Clamp-connections Present in all parts. NOTES The LSU sequence of our species was part of phylogenetic analyses presented in Ryberg & Matheny (2012) but its systematic position was not discussed. As far as we are aware, it is not mentioned in any other publication so far. nBLAST of this sequence does not suggest high similarities with other African species, although the most similar sequence (96.7% for 99 % coverage) is obtained from another Inocybe from African miombo woodlands: our still unpublished I. subfuscescentipes nom. prov. Inocybe curvipes P. Karst., a species described from Finland but now widely distributed throughout the world (Bougher & Matheny 2011), resembles it in a number of ways, notably in its browning stipe and spore shape, but has more vivid brown colours, spermatic smell, cylindrical or slightly swollen stipe and larger cystidia, broadly fusiform and noticeably tapered towards the apex; in addition, Inocybe curvipes associates with introduced Quercus or Pinus radiata, and also possibly Salix., Published as part of Buyck, Bart, Eyssartier, Guillaume, Armada, François, Corrales, Adriana, Hembrom, Manoj Emanuel, Rossi, Walter, Bellanger, Jean-Michel, Das, Kanad, Dima, Bálint & Ghosh, Aniket, 2022, Fungal biodiversity profiles 111 - 120, pp. 23-61 in Cryptogamie, Mycologie 20 (2) on pages 32-34, DOI: 10.5252/cryptogamie-mycologie2022v43a2, http://zenodo.org/record/7828891, {"references":["RYBERG M. & MATHENY P. B. 2012. - Asynchronous origins of ectomycorrhizal clades of Agaricales. Proceedings of the Royal Society. B 279, 2003 - 2011. https: // doi. org / 10.1098 / rspb. 2011.2428","BOUGHER N. L. & MATHENY P. B. 2011. - Two species of Inocybe (fungi) introduced into Western Australia. Nuytsia 21 (3): 139 - 148."]}

120. Vuilleminia tropica Hembrom, A. Ghosh, A. Parihar & K. Das, sp. nov. (Figs 23-25) DIAGNOSIS. — Differs from other species because of its tropical distribution, lemon yellow hymenophore delimited by a white floccose margin when actively growing and its erumpent nature with a tendency to grow on bark of dead wood, further also by the smaller basidiospores (11-16 × 5-8 µm), basidia (45-75 × 7-9 µm) and rare dendrohyphidia in the hymenium, the thin- to distinctly thick-walled generative hyphae with clamped septae. HOLOTYPE. — India. Jharkhand, Rajmahal hills, Sahibganj district, Brindaban Panchayat, Joshkuti, on dead fallen branch of Bauhinia vahilii Wight & Arn., 63 m, 25°01’50.9”N, 87°42’17.2”E, 29.VIII.2013, M. E. Hembrom, MEH-70133 (holo-, CAL [CAL1845]!). MYCOBANK. — MB 840192. GENBANK. — MZ314343 (nrITS, holotype), MZ314344 (nrITS, paratype); MZ314347 (nrLSU, holotype), MZ314346 (nrLSU, paratype). ETYMOLOGY. — Tropica (Lat.) refers to the tropical distribution of the taxon. ADDITIONAL MATERIAL STUDIED. — India. Bihar, Valmiki National Park, West Champaran district, Valmiki Nagar, on the fallen branch (un-barked wood) of Shorea robusta Gaertn., 27°26’26.1”N, 83°56’10.4”E, 141 m, 2019, M. E. Hembrom, MEH-19; West Bengal, Howrah district, AJCBIBG, Div.: VIII near Kyd monument, on dead branch of Psidium guajava L., 5 m, 22°33’25.4”N, 88°17’30.1”E, 30.VII.2020, M. E. Hembrom, KMA-20-26; Bihar, West Champaran, Valmiki National Park, Ganouli Forest Range, on the decorticant log of unidentified tree, 180 m, 27°22’33.6”N, 83°59’38.5”E, 01.VIII.2020, A. V. Kisku, MEH-20-50 (CAL1846). DESCRIPTION Basidiomata Annual, widely effused (5-200 × 5-100 mm or even much larger), up to 0.3 mm thick, growing on bark and more or less separable when fresh, but becoming closely adnate when dried, initially starting to form as small round patches with white margin that quickly merge to form large, effused, crusty basidiomata, leathery and slightly sticky when fresh, brittle and waxy on drying. Margin up to 1 mm wide when actively growing, distinct to indeterminate in older specimens, sterile, floccose, chalky-white (1-2A1) to pale yellow (3A3). Hymenophore Smooth, glabrous, pale yellow to pastel yellow (3A3-4) when young then yellow to lemon yellow (3B5-8), becoming bright yellow to almost egg yellow at maturity, finally ochraceous in older dried specimens. Flesh Papery thin, waxy, yellowish white (1-2A2). Hyphal system Monomitic, generative hyphae septate, clamped at most septa, thin- to moderately thick-walled, branched, with smooth, hyaline, acyanophilic walls (but contents cyanophilic) and not amyloid. Subhymenium & subiculum Composed of compactly arranged vertical elements ending with indistinct subiculum with crystal elements; basal hyphae 3-5 µm wide, thin to moderately thick-walled, loosely interwoven, cytoplasmic contents cyanophilic; hyphae in the middle part 2-4 µm wide, towards subhymenium less interwoven and less branched, more or less parallel, thin-walled. Hymenium Composed of hyphoid elements, rare delicate dendrohyphidia, basidia and basidioles; hyphoid elements 30-45 × 3-4 µm, embedded to projecting up to 16 µm beyond the hymenium, cylindrical, smooth. Dendrohyphidia often difficult to observe, up to 2 µm wide, less branched, thin-walled, smooth, hyaline. Basidia 45-75 × 7-9 µm, clavate to elongated cylindrical, 4-sterigmate with sterigmata 3-10 × 1-3 µm, clamped at base with clamps often delicate and difficult to observe, thin-walled, when young filled with dense and globular contents, becoming empty and collapsed with maturity, smooth, hyaline, when older with occasionally transverse septa. Basidiospores 11-13.6-16 × 5-6.35-8 µm, Q = 1.7-2.15-2.76, cylindrical to narrowly ellipsoid, moderately thick-walled with walls up to 1 µm thick, smooth, hyaline and acyanophilic; contents cyanophilic, inamyloid. NOTES Vuilleminia Maire is mostly confined to Europe with few exceptions (Bernicchia & Gorjón 2010; Ghobad-Nejhad et al. 2010). Very recently, one of us (MEH) came across some specimens in eastern tropical India growing on bark as well as invading the xylem vessels below the bark. Morphological features and molecular phylogeny place these specimens in the genus Vuilleminia, but none of the described species matches the present collections. The genus Vuilleminia fits the morphological features of our species, including the gelatinous (when fresh) to ceraceous basidiomata with monomitic hyphal system and clamped hyphae, pedicellate-clavate basidia producing large basidiospores and presence of dendrohyphidia (Hjortstam et al. 1988; Bernicchia & Gorjón 2010; Ghobad-Nejhad et al. 2010; Ghobad-Nejhad & Duhem 2013). Growing in the tropics and forming basidiomata (up to 300 µm thick) with lemon yellow hymenial surface and whitish floccose margin on fallen wooden logs, make it easy to identify our species in the field. The more or less thickwalled basidiospores with cyanophilic cytoplasmic contents are unrecorded from other Vuilleminia, viz. V. alni Boidin, Lanq. & Gilles; V. comedens (Nees) Maire; V. corticola Parmasto, V. coryli Boidin, Lanq. & Gilles; V. cystidiata Parmasto; V. erastii Ghob. -Nejh., V. macrospora (Bres.) Hjortstam; V. megalospora Bres.; V. nilsii Ghob. -Nejh. & Duhem, V. oyensis Duhem & M. Gérard, and V. pseudocystidiata Boidin, Lanq. & Gilles. (Hjortstam et al. 1988; Gorjón 2009; Bernicchia & Gorjón 2010; Ghobad-Nejhad et al. 2010, 2012; Ghobad-Nejhad & Duhem 2013). Many Vuilleminia have numerous dendrohyphidia, but in the present species dendrohyphidia are very few and become difficult to trace in older specimens and usually lack any side branching. Our phylogeny places this novel species sister to V. macrospora , which differs morphologically in its white basidiomata with abundant dendrohyphidia, and capitate, thick-walled, tubular cystidia, and it also has a temperate distribution (Bernicchia & Gorjón 2010; Ghobad-Nejhad et al. 2010). Vuilleminia nilsii shares the creamish to yellowish white hymenial surface and basidiospores with cyanophilic contents (Ghobad-Nejhad & Duhem 2013), but its spores are thinwalled and longer (14.5-18 µm).

112. Entoloma aurantioalpinum Armada, Vila, Bellanger, Noordel., Krisai & Dima , sp. nov. (Figs 2-4) DIAGNOSIS. — Macromorphologically similar to Entoloma formosum and E. xanthochroum, two widespread, not strictly alpine species in Europe that occur in lowlands and montane regions, and differ from this E. aurantioalpinum sp. nov. by their more distinctly translucently striate pileus, and furthermore, E. xanthochroum has a coloured lamella edge. HOLOTYPE. — France. Savoie, Peisey-Nancroix, GR5 route du lac de la Plagne, 2050 m. alt., leg. F. Armada, 25.VIII.2018, holo-, LY (FA 4336). MYCOBANK. — MB 840117. GENBANK. — MZ198885 (ITS holotype). ETYMOLOGY. — From aureus (golden) referring to the color of the pileus, and alpinus for growing in an alpine environment. ADDITIONAL MATERIAL STUDIED. — France. Savoie, Peisey-Nancroix, GR5 route du lac de la Plagne, 2050 m alt, leg. F. Armada, 23.VIII.2018, LY(FA 4334), ITS[MZ198882]. Italy. Busa de Tasca (Dolomiti), leg. E. Bizio, 23.VIII.2009, Bizio-23082009i2 L [L-0607578], ITS [MZ 468144]; Trentino-Alto Adige, Passo dello Stelvio/Stilfser Joch, near Berghotel Franzenshöhe, alpine grassland with Dryas and Salix spp., 2200 m alt., leg. B. Dima, 30.VII.2018, ELTE (DB 2018-07- 30-4), ITS [MZ 468145]. Austria. Kärnten, Völkermarkt, Eisenkappel: Vellacher Kotschna, 46°22’30”N, 14°32’30”E, mapping grid square 9653/1, alpine grassland, Caricetum firmae, Salix reticulata, calcareous soil, 1500 m s.m., leg. A. Hausknecht, M. E. Noordeloos, M. Meusers, I. Krisai-Greilhuber, and members of the Austrian Mycological Society, 9.IX.1998, WU-Mykol 18644, ITS [MZ 467302] — Niederösterreich, Lilienfeld, St. Aegyd am Neuwalde: Krumbach, Krumbachsattel, 47°48’33.66”N, 15°25’54.85”E, mapping grid square, 8158/4d, altitude 1200 m s.m., alpine grassland, calcareous soil, leg. A. Hausknecht, 6.IX.2006, WU-Mykol 0026678, ITS [MZ 467303]. DESCRIPTION Pileus 15-25 mm, conico-convex, often truncate or with slight umbilicus, with involute then more or less straight margin, at first uniformly orange-yellow to yellow orange towards margin, not or only weakly translucently striate, finely granulose to subsquamulose all over, particularly at center, glabrescent with age. Lamellae Rather crowded, adnate, thin, ventricose, up to 4 mm broad, sometimes a few forked, white then pink, with entire, concolorous edge. Stipe 29-43 × 2.5-4 mm, slender, cylindrical or with longitudinal groove, very brittle, with subbulbous base, pale orange, contrasting with pileus, polished or with a few longitudinal innate fibrils, with white basal mycelium. Context Very thin and brittle, concolorous with surface. Odour Indistinct. Taste Mild. Basidiospores 9.5-12 × (6.5)7.3-8.0(8.5) µm, average 10.3-10.8 × 8.0- 8.3 µm, Q = 1.2-1.7, Qav = 1.45, 6-7 angled in side view. Lamella edge Heterogeneous to almost sterile, made up of dense clusters of cheilocystidia. Cheilocystidia 40-65 × 10-14 µm, subcylindrical to clavate or broadly clavate. Pileipellis A cutis with transitions to a trichoderm at centre, made up of clavate terminal elements, 10-25 µm wide, with brownish yellow, intracellular pigment. Clamp-connections Absent. Habitat Terrestrial in alpine heaths amongst either Dryas octopetala or Salix species (S. retusa, S. hastata, S. reticulata), and herbs like Polygonum viviparum, and Alchemilla pentaphyllea, on calcareous bedrock. Distribution Rare, but probably widespread in the Alps in Austria, France, and Italy. NOTES Entoloma aurantioalpinum sp. nov. belongs to the diversified E. sarcitulum clade (Fig. 2), and clusters with two other so far unnamed alpine species. The macromorphologically similar Entoloma formosum and E. xanthochroum are widespread species in Europe, occurring in lowlands and montane regions, but not strictly alpine. Both differ from E. aurantioalpinum sp. nov. by the more distinctly translucently striate pileus, and furthermore, E. xanthochroum has a coloured lamella edge. The holotype of E. aurantioalpinum sp. nov. has, in addition to the intracellular pigment, also some slightly incrusted hyphae, but this has not been observed in the other collections of this species. Incrusting pigments are exceptional in Cyanula., Published as part of Buyck, Bart, Eyssartier, Guillaume, Armada, François, Corrales, Adriana, Hembrom, Manoj Emanuel, Rossi, Walter, Bellanger, Jean-Michel, Das, Kanad, Dima, Bálint & Ghosh, Aniket, 2022, Fungal biodiversity profiles 111 - 120, pp. 23-61 in Cryptogamie, Mycologie 20 (2) on pages 26-29, DOI: 10.5252/cryptogamie-mycologie2022v43a2, http://zenodo.org/record/7828891

119. Russula ferruginea subsp. panamensis Corrales & Manz, subsp. nov. (Figs 16 B-D; 19-22) DIAGNOSIS. — Russula ferruginea subsp. panamensis Corrales & Manz, subsp. nov. differs from Colombian subsp. ferruginea Corrales & Vera, subsp. nov. by terminal cells of hyphae in the pileipellis that are not occasionally to frequently inflated close to their bases, they are shorter on average and slightly narrower. These differences are most evident near the centre of the pileus, where average values of Colombian terminal cells are 18.5-32 × 4.1-4.6 µm and of Panamanian ones 13.5-15.5 × 3.4-3.5 µm. HOLOTYPE. — Panama. Chiriquí province, Quebrada Honda watershed, Fortuna forest reserve, 80°45’09.4”N, 82°14’23.6”W, 1191 m asl., associated with Oreomunnea mexicana, Quercus sp., 19.XII.2012, Anna Giessel & Meike Piepenbring A 28 (UCH, PMA). MYCOBANK. — MB 841771. GENBANK. — MZ604292 (holotype). ETYMOLOGY. — Referring to the distribution area of the subspecies, which is so far only known from Panama. ADDITIONAL MATERIAL STUDIED. — Panama. Chiriqui province, Zarciadero site near Bocas del Toro Road, Fortuna Forest Reserve, 8°45’24”N, 82°16’47”W, alt. 1000 m, in forest dominated by Oreomunnea mexicana, terrestrial, 19.IV.2012, A. Corrales 099 (ARIZ). DESCRIPTION Pileus Small to medium sized, 45-46 mm in diam., when mature plane with depressed centre; margin strongly tuberculate-striate to c. half of the radius; cuticle near centre shiny when wet, rugulose, near margin radially cracking, color near margin light brown turning to light yellowish brown or beige, near the center dark grey-brown, deep blackish brown to almost black. Lamellae Moderately distant, up to 4 mm broad, pale cream-white, lamellulae and furcations occasional, edge even and concolorous. Stipe 35 × 7 mm, cylindrical, longitudinally striate, near lamellae greyish white, towards base light brown, with darker reddishbrown spots at the base, interior hollow. Context 2 mm thick at the middle of the pileus radius, fragile, greyish brown, flesh turning reddish brown when cut and getting more red spots at the base when bruised, taste and odour not observed. Spore print White. Spores (6.8-)7.1-7.4-7.7(-8.2) × (5.3-)5.6-6-6.4(-6.8) µm, mainly broadly ellipsoid, Q = (1.09-)1.18-1.24-1.29(-1.4); ornamentation of moderately large, dense [(4-) 6-8 in a 3 µm diam. circle] amyloid, low, obtuse warts, (0.3-)0.5-0.8(-0.9) µm high, fused in pairs or short chains [(0-)1-4 fusions in the circle], connected by occasional to frequent line connections [(0-) 1-3 in the circle], isolated warts absent; suprahilar spot not amyloid, smooth, relatively large. Basidia (29-)32-35.4-39(-45) × (5.5-)7.5-8.9-10(-11) µm, fusiform or clavate, 4-spored; basidiola first cylindrical or ellipsoid, then clavate, c. 5-9 µm wide. Hymenial cystidia Numerous, c. 1800-2400/mm2, (37-)54-63.7-74(-90) × (5.5-)6.5-7.7-9(-11) µm, mainly fusiform or lanceolate, pedunculate, apically acute, with 1-6µm long appendage, thin-walled, often originating deeply in the subhymenium; contents almost homogenous, yellowish, with few faint dispersed granulations, turning dark brown in sulfovanillin; near the edges of lamellae smaller, (30-)32.5-40.3-48(-64) × 5-6.4-7(-8.5) µm, clavate, rarely lanceolate or fusiform, acute, occasionally also apically obtuse, apically with small, 1-3 µm long appendage. Marginal cells (7-)10-13.1-16(-19) × 4-5.9-7(-8.5) µm, similar to basidiola but shorter, occasionally mixed with some basidia. Pileipellis Orthochromatic in Cresyl Blue, sharply delimited from the underlying context, 70-130 µm deep; suprapellis very thin, up to 30µm deep, near margin disrupted and absent on some parts, composed of more or less horizontally oriented or repent and sometimes clustered hyphae; vaguely delimited from the thick, gelatinized subpellis formed by loose, irregularly oriented, 2-4 µm wide hyphae, that are denser and horizontally oriented near the trama. Acid-resistant incrustations Absent. Hyphal terminations Near the pileus margin loose or in dispersed clusters, composed of one or two cells, thin walled; terminal cells (8-)10-15.8-21(- 31) × 2.5-3.4-4(-5)µm, mainly cylindrical, occasionally clavate, apically obtuse; subterminal cells branched or not, of constant width and usually as long as wide. Hyphal terminations near the pileus centre similar,terminal cells (6-)10-14.6-19(-28) ×(2-)2.5- 3.4-4(-5) µm, frequently distinctly flexuous-nodulose. Pileocystidia Near the pileus margin dispersed, always 1-celled, mainly subulate, occasionally fusiform or lanceolate, thin-walled, (21-)32-60.9-89(-165) × (3-)3.5-4.6-5.5(-6) µm, apically acute-pointed, mostly with a 1-2µm long, pearl-like appendage; contents slightly yellowish with indistinct granulations, hardly reacting in sulfovanillin. Pileocystidia near the pileus centre relatively frequent, (20-)23-30.7-40(-65.5) × (3-)3.5- 4.5-5.5(-7) µm, usually subulate or lageniform, otherwise similar to those near the margin of the pileus. Cystidioid hyphae Dispersed in subpellis but more frequent near the context, sometimes similar to cystidia but longer, contents often more conspicuous, oleipherous and turning dark brown in sulfovanillin and red after carbolfuchsin treatment. Clamp connections Absent from all tissues. NOTES The Colombian collections described here as R. ferruginea sp. nov. are very similar to the Panamanian collections ARIZ (Corrales 99) and UCH (A28). We were unable to find any differences in the field, but this might be caused by the lack of details in field descriptions of the Panamanian samples. Under the microscope, Colombian collections have terminal cells of hyphae in the pileipellis occasionally to frequently inflated near bases that are on average longer and also slightly wider than terminal cells in the pileipellis of Panamanian collections. These differences are especially apparent near the pileus centre, where average values of Colombian terminal cells are 18.5-32 × 4.1-4.6 µm and of Panamanian ones are 13.5-15.5 × 3.4-3.5 µm. Our multi-loci analysis shows support to distinguish the Panamanian samples as different taxa from the Colombian samples but this was not supported by the individual gene analysis of LSU or rpb2. The fixed nucleotide differences between them are three in ITS, five in coding parts of tef1 α and three in rpb2 region. Because of few morphological differences and very close phylogenetic proximity, we decided to follow the criteria used byVera et al. (2021) and assign the rank of subspecies to populations of R. ferruginea sp. nov. separated by the disjunction at the Isthmus of Panama. The clade of R. ferruginea subsp. panamensis subsp. nov. based on sequences of the ITS region (Fig. 6) also includes the sequence KM594970, that was obtained from an ectomycorrhizal root tip of Oreomunnea mexicana from Panama (Corrales et al. 2016).

Russula purpureozonata K.Das, A.Ghosh & Buyck sp. nov. Figs 4���5 Diagnosis Russula purpureozonata sp. nov. is a blackening species with a dark purplish concentric zonation on the pileus surface and otherwise typical features of subsect. Decolorantes; it differs from the microscopically similar, North American R. burkei Burl. in its mild taste and ectomycorrhizal association with Abies densa, and from North American R. californiensis and R. magna in its distinctly smaller spores. Etymology Refers to the dark purplish concentric zones on the pileus surface. Material examined Holotype INDIA ��� Sikkim, East district, Memeinchu; 27��21.108��� N, 88��49.660��� E; alt. 3539 m a.s.l.; on the soil under Abies densa; 2 Aug. 2018; K. Das, KD 18-003; GenBank: MN267570 (ITS); CAL[1817]. Additional material INDIA ��� Sikkim, East district, opposite to Gnathang firing range forest; 27��18.605��� N, 88��48.794��� E; alt. 3885 m a.s.l.; on the soil under Abies densa; 5 Aug. 2018; K. Das, KD 18-15 (CAL 1818); GenBank: MN269951 (ITS); CAL[1818]. MycoBank: MB 838572; Index Fungorum number: IF558127; Facesoffungi number: FoF 09580 Description Pileus large-sized, 85���105 mm diam., hemispherical when young, then convex, plano-convex to applanate, broadly but shallowly depressed in the centre when mature; margin decurved to plane with maturity, entire; surface viscid when moist, then dry, finely areolate, peeling to �� of the radius, greyish yellow (2C3���4) or olive to linden green (2D5���6), centrally dark brown (7F4���5) to dark purple or purple-black with pastel yellow to light yellow patches (3A4���5), fading towards mid in distinctive concentric zones. Pileus context up to 8 mm thick, thinning towards margin, firm, brittle, chalky white (1���2A2), changing first orange-red, then black when cut or bruised; turning greyish red to reddish brown (8C���D5) and dull green (26E3���4) with guaiacol and FeSO 4, respectively. Lamellae adnexed to free, subdistant (6���7/cm at pileus margin), yellowish white (2���3A2), forked near the stipe apex; edge even and concolorous. Stipe 70���100 �� 20���30 mm, subclavate to clavate, tapered at the apex, central, solid; surface dry, finely longitudinally venose, chalky white (1���2A1) with yellowish white to pale yellow (4A2���3) flush at one side of the centre, changing first orange-red, then black when cut or bruised. Stipe context solid, chalky white (1���2A1), changing first orange-red, then black when cut or bruised; turning greyish red to reddish brown (8C���D5) and dull green (26E3���4) with guaiacol and FeSO 4, respectively. Odour indistinctive. Taste mild. Spore print yellowish white (3A2). Basidiospores globose, subglobose to broadly ellipsoid, (7.4���)7.6���8.02���8.4(���8.9) �� (6.5���)6.8���7.2���7.7 (���8) ��m, Q = (1.04���)1.07���1.11���1.15(���1.23), ornamentation amyloid, composed of somewhat cylindric (mostly with rounded or obtuse apices) isolated very small (0.3 ��m) to high (up to 1.2 ��m) spines and most of spines fused laterally and connected by thin to thick ridges (like small crests) forming partial reticulum; suprahilar plage amyloid; apiculi up to 2 ��m high. Basidia (35���)41���49���57(���68) �� 10���11���12(���14) ��m, 4-spored, subclavate to clavate. Subhymenium layer 20���25 ��m thick, made up of pseudoparenchymatous cells. Hymenial cystidia on lamellar sides (63���)71.5���86���101(���134) �� (9���) 9.5���11���12.5(���14) ��m, subcylindrical, cylindrical to ventricose with capitate, mucronate, moniliform or appendiculate (up to 7 ��m long appendage) apex, emergent up to 55 ��m beyond the basidiole tips; contents dense, heteromorphous and partly or completely filled with fibrous to somewhat crystalloid components, hardly staining in sulfovanillin. Lamellae edges fertile with frequent basidia. Hymenial cystidia on lamellar edges (72���)75���84���92.5(���98) �� (9���)9.6���10.5���11.5(���12) ��m, subcylindrical, cylindrical to ventricose with obtuse-rounded, capitate, mucronate or appendiculate apex; contents dense, heteromorphous and partly or completely filled with fibrous to somewhat crystalloid components, hardly staining in sulfovanillin. Hymenophoral trama composed of numerous sphaerocytes and connecting hyphae; sphaerocytes globose to elliptical. Pileipellis orthochromatic in Cresyl Blue, sharply delimited from the underlying sphaerocytes of the context, 120���180 ��m thick, two-layered, distinctly divided in 50���80 ��m deep suprapellis composed of erect or ascending hyphal terminations, arranged in a densely turf of trichodermal structure and dispersed pileocystidia, and subpellis 70���100 ��m deep, composed of more or less horizontally irregularly oriented, moderately dense, 2.5���3.5 ��m wide pilear hyphae. Acid-resistant incrustations absent. Hyphal terminations near the pileus margin usually branched at the subterminal cells or the cells just below, occasionally slightly flexuous, thin-walled; terminal cells (13���)15.5���24.5���34(���53) �� 3���3.5���4.5(���5) ��m, mainly subulate to tapering towards tips or cylindrical to subcylindrical, apically obtuse or slightly narrowed towards tips and wider near base; subterminal cells usually equal in size, rarely with lateral branches or nodulose, equally wide or more or slightly wider. Hyphal terminations near the pileus centre with shorter but slightly wider terminal cells measuring (9���)17���22.5���28.5(���35) �� (2.5���)3���4���4.5(���6) ��m, mainly tapering to subulate towards tips or cylindrical or ventricose or occasionally lageniform, apically obtuse or slightly narrowed towards tips and wider near base; subterminal cells equally wide, sometimes slightly wider or ventricose, rarely with nodulose or with lateral branches. Pileocystidia near the pileus margin 1���4-celled, numerous, cylindrical, usually originating deep in subpellis and often originating from branched subterminal cells, thin-walled; terminal cells (30���)32.5���52���71(���108) �� (4���)4.5���5���6(���6.5) ��m, cylindrical or sometimes slightly tapered towards tips, rounded-obtuse, without any incrustations; contents heteromorphous-crystalline, without reaction in sulfovanillin. Pileocystidia near the pileus centre with often more septa (1���7); terminal cells (14���) 22.5���38���54(���73) �� (4���)4.5���5���6(���7) ��m, cylindrical or slightly tapered towards tips, rounded-obtuse apex. Clamp connections absent from all tissues., Published as part of Ghosh, Aniket, Das, Kanad & Buyck, Bart, 2021, Two new species in the Russula (Russulaceae, Basidiomycota) crown clade from Indian Himalaya, pp. 157-172 in European Journal of Taxonomy 782 on pages 164-167, DOI: 10.5852/ejt.2021.782.1595, http://zenodo.org/record/5787334

Russula adwanitekae A.Ghosh, K.Das & Buyck sp. nov. Figs 2���3 Diagnosis Russula adwanitekae sp. nov. is mainly separated from similarly looking species with reddish lilac, orchid purple or greyish to deep magenta colored pileus in subsect. Laricinae by its sequence data (nrITS) and geographic distribution. Etymology After the name of the forest locality, Adwani-Teka. Material examined Holotype INDIA ��� Uttarakhand, Pauri Garhwal, Adwani-Teka forest; 30��05.681��� N, 78��43.890��� E; alt. 1989 m a.s.l.; in temperate mixed forest; 3 Oct. 2016; A. Ghosh, AG 16-1430; GenBank: MN263242 (ITS); CAL[1821]. Paratype INDIA ��� Uttarakhand, Pauri Garhwal, Adwani-Teka forest; 30��05.675��� N, 78��43.880��� E; alt. 1953 m a.s.l.; in temperate mixed forest; 5 Oct. 2016, A. Ghosh, AG 16-1435; GenBank: MN263243 (ITS); CAL[1822]. MycoBank: MB 838571; Index Fungorum number: IF558126; Facesoffungi number: FoF 09581 Description Pileus small to medium-sized, 36���53 mm diam., convex when young, becoming plano-convex, applanate to uplifted with maturity, broadly depressed centre, near the margin becoming tuberculately striate and more or less straight with age, entire; pileipellis peeling to mid-radius; surface dry, shiny and viscid when moist, glabrous, reddish lilac (14C3���5), orchid purple (14C8) or greyish magenta (14D5���7) to deep magenta (14D8) and centrally dark magenta (13���14F4���8). Pileus context firm, brittle, yellowish white (1���2A2), unchanging after bruising, on exposure or with age. Lamellae adnexed to subdecurrent, equal but mixed with some dispersed lamellulae of different length, close (10���12/cm at pileus margin), cream to pale yellow or light yellow (4A2���4), up to 6 mm broad, occasionally forked near the stipe apex; lamella edge even and concolorous. Stipe 35���51 �� 7���14 mm, cylindrical to subclavate, tapered at the apex, central, solid but not firm; surface dry, finely longitudinally venose, chalky white (1���2A1) but with yellowish white to pale yellow (4A2���3) flush near its middle portion, changing greyish white (1���2B1) after bruising. Stipe context solid, chalky white (1���2A1), changing dirty white or greyish white (1���2B1) after bruising or on exposure; turning reddish brown (8E7���8) to dark brown (8F7���8) with application of guaiacol. Odour indistinctive. Taste mild. Spore print not obtained. Basidiospores subglobose to broadly ellipsoid, rarely ellipsoid, (7���)7.73���8.23���8.72(���9.5) �� (6���)6.6��� 6.93���7.3(���8) ��m, Q = (1.07���)1.13���1.19���1.25(���1.33), ornamentation amyloid (up to 1.7 ��m high), consisting of thick ridges and warts forming incomplete reticulum, with some isolated intermediate warts; suprahilar plage amyloid; apiculi up to 2 ��m high. Basidia (29���)32���35���38(���40) �� (10���)10���11���13 (���15) ��m, 4-spored, subclavate to clavate; sterigmata up to 8 ��m long. Subhymenium layer up to 37 ��m thick, pseudoparenchymatous. Hymenial cystidia on lamellar sides (55���)61.5���71.5���81(���92) �� (7���)8��� 9.5���10.5(���11) ��m, cylindrical, subclavate to fusiform with frequent lageniform (up to 23 ��m long) or appendiculate or few rounded-obtuse apices, emergent up to 32 ��m beyond the basidiole tips; contents crystalline, without reaction in sulfovanillin. Lamellae edges fertile with basidia and cystidia. Hymenial cystidia on lamellar edges (37���)42.5���52.5���62.5(���66) �� (6���)6���7���8(���9) ��m, cylindrical to subclavate with lageniform (up to 20 ��m long) or appendiculate or rounded apex; contents crystalline, without reaction in sulfovanillin. Hymenophoral trama mainly composed of large nests of sphaerocytes and few hyphal elements. Pileipellis orthochromatic in Cresyl Blue, sharply delimited from the underlying sphaerocytes of the context, 100���120 ��m thick, two-layered, distinctly divided in 40���50 ��m deep suprapellis composed of erect or ascending hyphal terminations, arranged in a trichodermal structure and dispersed pileocystidia, and subpellis 60���70 ��m deep, composed of more or less dense, horizontally oriented hyphae.Acid-resistant incrustations absent. Hyphal terminations near the pileus margin usually branched at the subterminal cells or the cells just below, thin-walled; terminal cells (11���)19���28.5���37.5(���50) �� 3���4���4.5(���6) ��m, mainly subulate, sometimes cylindrical to subcylindrical, apically obtuse or slightly narrowed towards tips and wider near base or sometimes attenuated; subterminal cells usually equal in size, sometimes with lateral branches; near the pileus centre with slightly shorter and less wide terminal cells, measuring (15���)18.5���25���32(���44) �� (2���)2.5���3���3.5(���4) ��m, but equally wide subterminal cells. Pileocystidia near the pileus margin 1���4-celled, cylindrical, usually originating deep in subpellis and often originating from branched subterminal cells, thin-walled; terminal cells (23���)40.5���62���83(���110) �� (4���)4.5���5���6(���7) ��m, cylindrical or sometimes slightly tapered towards tips, rounded-obtuse apex, without any incrustations; contents crystalline, without reaction in sulfovanillin; those near the pileus centre with 0���3 septa and shorter terminal cells (15���)25.5���38���51(���70) �� (3.5���)4���5���5.5(���7) ��m. Clamp connections absent from all tissues., Published as part of Ghosh, Aniket, Das, Kanad & Buyck, Bart, 2021, Two new species in the Russula (Russulaceae, Basidiomycota) crown clade from Indian Himalaya, pp. 157-172 in European Journal of Taxonomy 782 on pages 161-164, DOI: 10.5852/ejt.2021.782.1595, http://zenodo.org/record/5787334

Russula coronaspora Y.Song sp. nov. MycoBank: MB837425 Index Fungorum: IF558819 Figs 3–4, 7A Diagnosis Russula coronaspora sp. nov. is mainly characterized by its small basidiocarps with pinkish brown pileus, interveined lamellae with few lamellulae, small spores ornamented with sparse, cylindrical and isolated spines, hymenial and dermatocystidia weakly SV+ or SV-, pileipellis gelatinized and orthochromatic in cresyl blue, pileocystidia mostly septate and sometimes branched. Etymology Named after its basidiospores which resemble a coronavirus. Type material Holotype CHINA • Guangdong Province, Zhaoqing City, Dinghushan Biosphere Reserve, on the ground in evergreen broad-leaf forest; 22 Apr. 2019; Y. Song, K19042201; GenBank nos: MN275689 (ITS), MN839580 (nLSU), MN839630 (mtSSU), MT085562 (rpb1), MT085657 (rpb2), MT085600 (tef1); GDGM79711. Additional material examined CHINA • Guangdong Province, Zhaoqing City, Dinghushan Biosphere Reserve, on the ground in evergreen broad-leaf forest; 6 Apr. 2016; Y. Song, K16040650; GenBank no: MN275690 (ITS); GDGM79712. Description Basidiocarp small sized. Pileus 2.5–4 cm in diam., hemispherical to convex at first, turning applanate with depressed center at maturity; surface glabrous, dry, viscid when wet, pinkish (#FDF2E9) or brownish (#FCF3CF), sometime white (#FFFFF0) at margin; margin entire, sometimes cracked, striate when young. Lamellae white (#FFFFF0), interveined, mixed with few, dispersed shorter lamellulae; edge entire, concolorous, smooth. Stipe central, 2–3.5 × 0.5–1 cm, cylindrical, sometimes tapering upwards, solid at first, turning spongy to hollow with age, fleshy, fragile, white (#FBFCFC). Context white, not changing when bruised; taste mild; odor indistinct. Spore print pale cream (#FBFBEF). Basidiospores subglobose to ellipsoid, rarely globose, very small, (60/3/2) (4.5–)4.7–5.1–5.6 (–6.2)× (3.6–) 3.8–4.2–4.6(–4.8) μm, [Q = 1.12–1.20–1.32(–1.38)], hyaline in 5% KOH; ornamentation amyloid, spines cylindrical to subclavate, sometimes tapering upwards or downwards, less than 2 μm in height, sparsely distributed [2–(4–) 5 in a 3 μm diam. circle], isolated, long warts scattered, never connected; suprahilar spot indistinct, amyloid. Basidia clavate, 2- or 4-spored, thin-walled, often with irregular contents or droplets, (19.5–)21.5–25–30(–35) × 7–9–10.5(–11) μm; sterigmata 2.4–5.1×1.2– 1.5 μm. Hymenial gloeocystidia on gill sides subcylindrical to fusiform, with papillate, mucronate or branched apices, thin-walled, with irregular refractive contents, weakly SV+ or SV-, (21–)23.5–33– 49(–51) × 4.5–5.5–7.5 μm; on gill edges not abundant, 33–40–46(–50) ×4.5–5–6 μm. Subhymenium pseudoparenchymatous. Lamellar trama composed of numerous sphaerocytes surrounded by connective hyphae, sphaerocytes up to 21 × 19 μm. Pileipellis orthochromatic in cresyl blue, gelatinized, composed of ascending to erect hyphae, 33–80 μm thick; terminal cells cylindrical, with obtuse or tapering apices, thin-walled, hyaline, (7.5–)8.5–14–19(–24) ×1.5–2–3 μm. Pileocystidia abundant, cylindrical to fusiform, with obtuse or tapering apices, mostly 1- or 2-septa, sometimes branched, with refractive contents, weakly SV+ or SV-, (29–)30.5–62–94.5(–98.5) ×3–4.5–6(8.5) μm. Stipitipellis a cutis, composed of septate and hyaline hyphae measuring 1–3 μm wide; terminal cells cylindrical with obtuse apices, thin-walled, hyaline. Caulocystidia frequent, cylindrical, obtuse or papillate, mostly septate, with refractive contents, (30.5–)33–39.5–49(–57.5)×2–3–4 μm. Clamp connections absent in all tissues.

Russula minor Y.Song sp. nov. MycoBank: MB837427 Index Fungorum: IF558489 Figs 5–6, 7B Diagnosis Russula minor sp. nov. is mainly characterized by its very small basidiocarp with thin context and pink to rosy pileus less than 2.5 cm in diam., pileipellis very easy to peel off, white to cream lamellae with few lamellulae, often curved and hollow to multi-chambered stipe, spores with conical to cylindrical warts never connected, very small basidia and gelatinized pileipellis with slender terminal cells and abundant pileocystidia, and pleurocystidia weakly SV+ (slightly becoming brownish) or SV-, while pileocystidia becoming brown in SV. Etymology Referring to its very small basidiocarp. Type material Holotype CHINA • Guangdong Province, Zhaoqing City, Dinghushan Biosphere Reserve, on the ground in evergreen broad-leaf forest mainly with plants in Fagaceae; 12 Sep. 2016; Y. Song, K18043001; GenBank nos.: MN275666 (ITS), MK881964 (nLSU), MK882091 (mtSSU), MT085496 (rpb1), MK880691 (rpb2), MT085599 (tef1); GDGM79686. Additional material examined CHINA • Guangdong Province, Zhaoqing City, Dinghushan Biosphere Reserve, on the ground in evergreen broad-leaf forest; 8 Sep. 2018; F. Yuan and Y. Song, K18090802; GenBank no: MN275665 (ITS); GDGM79687 • same data as for preceding; F. Yuan and Y. Song, K18090827; GenBank no: MN275667; GDGM79688 • same data as for preceding; 10 Sep. 2018; F. Yuan and Y. Song, K18091022; GenBank no: MN275668; GDGM79689. Description Basidiocarp very small (pileus diameter less than 3 cm). Pileus 0.8–2.5 cm in diam., hemispherical to convex when young, turning applanate with depressed center or infundibuliform at maturity; surface dry, viscid when wet, sometimes slightly villose at center, easy to peel to 2/3 radius, white (#FFFAFA) to pinkish (#FAEBD7) at margin, pink, fuchsia pink to rosy (#F97D8E, # C85868, #DF828F) at center; margin smooth and entire at first, turning striate with age, sometimes cracked. Lamellae adnate, dense at first, becoming scattered with age, interveined, white when young, turning yellowish cream (#FCF3CF, #FEF9E7) at maturity; edge concolorous, smooth; lamellulae irregularly dispersed. Stipe central, fleshy, fragile, cylindrical, often curved, solid at first, turning hollow to multi-chambered with age, 0.7–1.2 × 0.2–0.4 cm, white to yellowish cream (#FCF3CF, #F8F9C2), sometimes slightly villose. Context white, sometimes yellowing at lower part of the stipe; taste mild; odor indistinct. Spore print pale cream (#F3E2A9). Basidiospores subglobose to ellipsoid, rarely globose, (40/2/2) (5.0–)5.3–5.8–6.1(–6.6) × (4.1–) 4.3–4.6–4.9(–5.2) μm, [Q = (1.11–)1.15–1.22–1.30], hyaline in 5% KOH; ornamentation amyloid, conical to cylindrical warts less than 1.5 μm in height, mostly isolated, rarely fused into short crest, but not reticulate; suprahilar spot amyloid. Basidia clavate, 2- or 4-spored, thin-walled, with irregular contents or dorplets, small, (17–)17.5–21–27(–29.5)×7–8.5–9.5(–10) μm; sterigmata 2.2–4.8 ×0.9–1.7 μm. Pleurocystidia subcylindrical to fusiform, with obtuse, papillate or mucronate apices, thin-walled, with irregular refractive contents, weakly SV+ or SV-, 26.5–36–48(–52.5)×4–6–7 μm. Cheilocystidia similar to pleurocystidia, but shorter, 20–31–40(–47) in length. Subhymenium pseudoparenchymatous. Lamellar trama composed of numerous sphaerocytes surrounded by connective hyphae, sphaerocytes measuring 21–28 μm in diam. Pileipellis 60–120 μm thick, gelatinized, composed of ascending to erect hyphae; hyphae cylindrical, thin-walled, hyaline, sometimes branched, 1.5–4 μm wide; terminal cells cylindrical, slender, with obtuse or tapering apices, thin-walled, hyaline, (7–)8–18–31(–44) × 2–2.5–3.5 μm. Pileocystidia one-celled, abundant, subcylindrical to subclavate, obtuse or papillate, sometimes branched, with refractive contents, becoming brown in SV, (15.5–)16–46–106(–130) × 3–4.5–6.5 μm. Stipitipellis a cutis, composed of cylindrical, septate, thin-walled, hyaline hyphae measuring 1-3 μm in diam.; terminal cells cylindrical with obtuse apices, hyaline, 9–13.5–16(–18) ×2.5–3–4 μm. Caulocystidia subcylindrical, with obtuse apices, with irregular refractive contents, becoming brown in SV, (16.5–)21–35–62(–85.5)× 3–5–6.5 μm. Clamp connections absent in all tissues., Published as part of Song, Yu, Xie, Xiu-Chao & Buyck, Bart, 2021, Two novel species of subgenus Russula crown clade (Russulales, Basidiomycota) from China, pp. 15-33 in European Journal of Taxonomy 775 on pages 25-28, DOI: 10.5852/ejt.2021.775.1543, http://zenodo.org/record/5578352

This article is the tenth series of the Fungal Diversity Notes, where 114 taxa distributed in three phyla, ten classes, 30 orders and 53 families are described and illustrated. Taxa described in the present study include one new family (viz. Pseudoberkleasmiaceae in Dothideomycetes), five new genera (Caatingomyces, Cryptoschizotrema, Neoacladium, Paramassaria and Trochilispora) and 71 new species, (viz. Acrogenospora thailandica, Amniculicola aquatica, A. guttulata, Angustimassarina sylvatica, Blackwellomyces lateris, Boubovia gelatinosa, Buellia viridula, Caatingomyces brasiliensis, Calophoma humuli, Camarosporidiella mori, Canalisporium dehongense, Cantharellus brunneopallidus, C. griseotinctus, Castanediella meliponae, Coprinopsis psammophila, Cordyceps succavus, Cortinarius minusculus, C. subscotoides, Diaporthe italiana, D. rumicicola, Diatrypella delonicis, Dictyocheirospora aquadulcis, D. taiwanense, Digitodesmium chiangmaiense, Distoseptispora dehongensis, D. palmarum, Dothiorella styphnolobii, Ellisembia aurea, Falciformispora aquatic, Fomitiporia carpinea, F. lagerstroemiae, Grammothele aurantiaca, G. micropora, Hermatomyces bauhiniae, Jahnula queenslandica, Kamalomyces mangrovei, Lecidella yunnanensis, Micarea squamulosa, Muriphaeosphaeria angustifoliae, Neoacladium indicum, Neodidymelliopsis sambuci, Neosetophoma miscanthi, N. salicis, Nodulosphaeria aquilegiae, N. thalictri, Paramassaria samaneae, Penicillium circulare, P. geumsanense, P. mali-pumilae, P. psychrotrophicum, P. wandoense, Phaeoisaria siamensis, Phaeopoacea asparagicola, Phaeosphaeria penniseti, Plectocarpon galapagoense, Porina sorediata, Pseudoberkleasmium chiangmaiense, Pyrenochaetopsis sinensis, Rhizophydium koreanum, Russula prasina, Sporoschisma chiangraiense, Stigmatomyces chamaemyiae, S. cocksii, S. papei, S. tschirnhausii, S. vikhrevii, Thysanorea uniseptata, Torula breviconidiophora, T. polyseptata, Trochilispora schefflerae and Vaginatispora palmae). Further, twelve new combinations (viz. Cryptoschizotrema cryptotrema, Prolixandromyces australi, P. elongatus, P. falcatus, P. longispinae, P. microveliae, P. neoalardi, P. polhemorum, P. protuberans, P. pseudoveliae, P. tenuistipitis and P. umbonatus), an epitype is chosen for Cantharellus goossensiae, a reference specimen for Acrogenospora sphaerocephala and new synonym Prolixandromyces are designated. Twenty-four new records on new hosts and new geographical distributions are also reported (i.e. Acrostalagmus annulatus, Cantharellus goossensiae, Coprinopsis villosa, Dothiorella plurivora, Dothiorella rhamni, Dothiorella symphoricarposicola, Dictyocheirospora rotunda, Fasciatispora arengae, Grammothele brasiliensis, Lasiodiplodia iraniensis, Lembosia xyliae, Morenoina palmicola, Murispora cicognanii, Neodidymelliopsis farokhinejadii, Neolinocarpon rachidis, Nothophoma quercina, Peroneutypa scoparia, Pestalotiopsis aggestorum, Pilidium concavum, Plagiostoma salicellum, Protofenestella ulmi, Sarocladium kiliense, Tetraploa nagasakiensis and Vaginatispora armatispora).

Russula latolamellata Y.Song & L.H.Qiu, sp. nov. (Figs 3; 4) MYCOBANK NUMBER. — MB 835726. HOLOTYPE. — China. Guangdong Province, Zhaoqing City, Dinghushan Biosphere Reserve, on the ground in broadleaf forest, 6.IV.2015, J. B. Zhang K15060604 (GDGM 79561). ETYMOLOGY. — Named after its broad lamellae. DIAGNOSIS. — Mainly characterized by its distinctly cracking and black-tan pileus, broad and sparse lamellae, stipe and context becoming scarlet when bruised, basidiospores with completely reticulate ornamentations, common presence of 1-spored basidia, encrusted hyphae with brown pigments in pileipellis and absence of both pileocystidia and caulocystidia. HABITAT AND DISTRIBUTION. — Solitary or gregarious in broadleaf forest. ADDITIONAL SPECIMENS EXAMINED. — China. Guangdong Province, Zhaoqing City, Dinghushan Biosphere Reserve, on the ground in broadleaf forest, 13. IX. 2016, J. W. Li, Y. Song K16091311 (GDGM 79562); 13.VII.2015, J. W. Li, Y. Song K17071307 (GDGM 79563). DESCRIPTION Basidiomata Medium to large sized, agaricoid. Pileus 6-12 cm in diameter, hemispherical when young, becoming applanate with a slightly depressed center when mature; surface dry, cracking, tan, grayish to blackish brown, not easy to peel; margin entire or undulate. Lamellae Adnate, sparse, up to 8 mm broad, irregularly unequal, sometimes forked near stipe or at pileus margin, sometimes interveined; surface smooth, white, off-white to cream, tinged with reddish brown; lamella edge concolorous. Stipe 4-8 cm long, central, cylindrical, sometimes tapering upwards or downwards, longitudinally rugulose, white to off-white, becoming grayish white when old, turning reddish-brown to scarlet when bruised, solid or stuffed. Context White, becoming reddish-brown when bruised, turning yellowish-brown in reaction with 5% FeSO 4. Odour Slightly unpleasant. Taste Mild. Spore print White. Basidiospores Subglobose to ellipsoid, [100/5/3] (5.9-) 6-6.8-7.4 (-7.5) × (4.9-) 5.1-5.8-6.5 (-6.9) µm, Q = (1.04-) 1.06-1.17-1.32 (-1.37); ornamentations amyloid, composed of low ridges, forming a complete reticulum; suprahilar spot inamyloid. Basidia 41-60 × 6-12 µm, clavate to narrowly clavate, 1-, 2-, 3- or 4-spored, hyaline or containing oil droplets; sterigmata 4.8- 8.3 × 1.4-2.2 µm. Lamellar trama Composed of nested sphaerocytes measuring 18.5-55.5 × 17-43 µm and surrounded by connective hyphae. Pleurocystidia (35.5-) 38-62-83 (-91) × (4.5-) 6-7.5-10 µm, protruding up to 30 µm, narrowly clavate to narrowly cylindrical with obtuse or mucronate apices, thin-walled, with refractive contents, unchanging in SV. Cheilocystidia (34-)39-43-47(-51) × 4.5-5-6.5 µm, resembling pleurocystidia in shape but smaller in size, thin-walled, with refractive contents, unchanging in SV. Marginal cells Not differentiated. Pileipellis Composed of ascending to erect hyphae, orthochromatic in cresyl blue; hyphae 2-6 µm in width, cylindrical, septate, some with incrustation and brown dispersive pigments; terminal cells (8-)11-23-36(-38.5) × 2.5-4-6(-7.5) µm, usually cylindrical with obtuse apices and brown pigments, lageniform, clavate to cylindrical, some with short rostrate apicesor granular contents. Pileocystidia None found. Stipitipellis Composed of erect hyphae, 40-90 µm wide; hyphae 1.5-4 µm in width, narrowly cylindrical, septate; terminal cells (6.5-)13- 22-31(-39) × 2-4-6(-7.5) µm, thin-walled, usually hyaline, cylindrical to clavate with obtuse apices. Caulocystidia None found. Clamp connections Absent. NOTES Russula latolamellata Y.Song & L.H.Qiu, sp. nov., morphologically resembles R. schaefferina Rawla & Sarwal, including pileus color and features of pileipellis, size and ornamentations of basidiospores and absence of both pileocystidia and caulocystidia, etc. However, it differs substantially from our species in its finely pruinose pileus with uncracking surface, thin and crowded lamellae, and further also by shape and size of pleurocystidia (85-98 × 10-14 µm), and cheilocystidia (35-50 × 9-13 µm), and the hollow stipe covered with ochraceous or brown depressed fibrillose scales (Rawla & Sarwal 1983). When bruised, context of R. latolamellata Y.Song & L.H.Qiu, sp. nov., directly becomes reddish brown without turning black first. Although all three specimens of R. latolamellata Y.Song & L.H.Qiu, sp. nov., were collected from the broadleaf forest of DHSBR, several ITS sequences that have a sequence similarity of about 99% to that of R. latolamellata Y.Song & L.H.Qiu, sp. nov., retrieved from soil in the pine and broadleaf mixed forest of DHSBR are available in GenBank, implying that the species may be common in DHSBR. Russula nigrocarpa S.Y.Zhou,Y.Song & L.H.Qiu, sp. nov. (Figs 5; 6) MYCOBANK NUMBER. — MB 835727. HOLOTYPE. — China. Guangdong Province, Zhaoqing City, Dinghushan Biosphere Reserve, on the ground in broadleaf forest, 16.VII.2019, S. Y. Zhou K19071603 (GDGM 79720). ETYMOLOGY. — Named after its dark black pileus. DIAGNOSIS. — Mainly characterized by its dry, cracking, dark brown to dark black pileus, off-white lamellae, basidiospores with complete reticulate ornamentations, hymenial cystidia and pileocystidia of various forms with often forked apices, strongly glutinous pileipellis composed of hyphae usually with dark brown vacuolar pigments. HABITAT AND DISTRIBUTION. — Solitary or gregarious in evergreen broadleaf forest. ADDITIONAL SPECIMENS EXAMINED. — China. Guangdong Province, Zhaoqing City, Dinghushan Biosphere Reserve, on the ground in broadleaf forest, 5.V.2018, J. W. Li, Y. Song K18050529 (GDGM 79721). DESCRIPTION Basidiomata Medium to large sized, agaricoid. Pileus 6-10cm in diameter,applanate to concave when mature;surface dry, dark brown to dark black; margin entire, turning slightly upward. Lamellae Adnate to slightly decurrent, sparse, 6 pieces of lamellae and lamellulae/cm at the margin of pileus, broad, unequal; surface off-white to cream or yellowish, becoming dark brown when bruised; gill edge concolorous, becoming dark brown to black when old (probably from drying out). Stipe 3-5 × 2.5-4 cm, central, cylindrical, sometimes tapering downwards, solid, off-white, becoming grayish white when mature, turning dark brown when bruised. Context White, becoming directly black when bruised without reddening first, 6-8 mm thick near stipe. Odour Unpleasant. Taste Not taken. Spore print White to cream. Basidiospores Subglobose to ellipsoid, [40/2/2] 4.3-4.8-5.4 (-5.8) × (3.4-) 3.7- 4-4.4 (-4.6) µm, Q = 1.10-1.19-1.28 (-1.35); ornamentations amyloid, composed of low ridges forming a complete reticulum; suprahilar spot inamyloid. Basidia (22-) 26.5-31-35 (-46.5) × 5-6.5-8µm, clavate to cylindrical, 1-, 2-, 3- or 4-spored, with refractive contents; sterigmata 1.8-6 µm long. Lamellar trama Composed of nested sphaerocytes surrounded by connective hyphae. Pleurocystidia (31-) 35-41-52 (-58) × 3.5-5-6.5 µm, of various forms, narrowly cylindrical to slightly flexuose with obtuse, mucronate, moniliform, inflorescence-like or forked apices, thin-walled, with refractive contents, unchanging in SV. Cheilocystidia 25-29-35 × 3-4-5 µm, narrowly cylindrical to slightly flexuous with obtuse or rostrate apices, with refractive contents, thin-walled, unchanging in SV. Marginal cells Not differentiated. Pileipellis Composed of ascending to erect hyphae, strongly gelatinized, 150-220 µm thick, orthochromatic in cresyl blue; hyphae 2-6 µm wide, narrowly cylindrical, septate, often with dark brown pigments; terminal cells 12.5-17-22 (-25) × 2.5-4-6 (-7) µm, cylindrical to narrowly clavate with obtuse or slightly acute apices, some with dark brown pigments. Pileocystidia 16.5-25-33.5 × 2.5-4-5.5 µm, subclavate to cylindrical, apices mucronate to inflorescence-like, with refractive contents, thin-walled, unchanging in SV. Stipitipellis Composed of ascending to erect hyphae, 60-100 µm thick, gelatinous; hyphae 1.5-4 µm wide, narrowly cylindrical, septate; terminal cells (8-) 10-19-31 (-34) × 2.5-5-9 (-10) µm, cylindrical to narrowly clavate with obtuse apices, sometimes containing brown pigments. Caulocystidia (16.5-) 21-34-52 (-56) × 3.5-4.5-6 µm, thin-walled, cylindrical with obtuse or short rostrate apices. Clamp connections Absent. NOTES R. nigrocarpa S.Y.Zhou, Y.Song & L.H.Qiu, sp. nov., is closely related to R. acrifolia in our multilocus phylogeny (Figs 1; 2). The latter species differs from R. nigrocarpa S.Y.Zhou, Y.Song & L.H.Qiu, sp. nov., in its viscid, grayish brown pileus, context that turns red then gray to black when bruised, much crowded lamellae and grayish brown stipe but, above all, in the much larger size (6.0-9.5 × 5.5-7.5 µm) of its basidiospores (Çolak & Işiloğlu 2016). The exceptionally small size of the spores of R. nigrocarpa S.Y.Zhou, Y.Song& L.H.Qiu, sp. nov., comparable to those of species in subg. Archaeae, was hitherto undocumented within subg. Compactae, making it impossible to confuse our species with any of the other Asian or northern hemisphere species in the same subgenus., Published as part of Zhou, Songyan, Song, Yu, Chen, Kaixing, Li, Jingwei, Buyck, Bart & Qiu, Lihong, 2020, Three novel species of Russula Pers. subg. Compactae (Fr.) Bon from Dinghushan Biosphere Reserve in southern China, pp. 219-234 in Cryptogamie, Mycologie 20 (14) on pages 222-232, DOI: 10.5252/cryptogamie-mycologie2020v41a14, http://zenodo.org/record/7814990, {"references":["RAWLA G. S. & SARWAL B. M. 1983. - Taxonomic studies on Indian agarics I. Russulaceae. Bibliotheca Mycologica 91: 23 - 46.","COLAK O. & IsILOGLU M. 2016. - The Subgenus Compactae (Russula) species in Turkey. Turkish Journal of Life Sciences 1: 86 - 95."]}

Russula ochrobrunnea S.Y.Zhou, Y.Song & L.H.Qiu, sp. nov. (Figs 7; 8) MYCOBANK NUMBER. — MB 835743. HOLOTYPE. — China. Guangdong Province, Zhaoqing City, Dinghushan Biosphere Reserve, on the ground in broadleaf forest, 15.VII.2019, S. Y. Zhou K19071502 (GDGM 79718). ETYMOLOGY. — Named after its light brown lamellae with ochre margin when mature. DIAGNOSIS. — Characterized by its grayish-brown pileus with striate to slightly cracking margin, sparse and light brown lamellae with ochre margin when mature, small basidiospores, presence of 1-spored basidia, flexuous to cylindrical hymenial cystidia often with papillate or branched apices and hyphae usually with brown pigments in pileipellis. HABITAT AND DISTRIBUTION. — Solitary or gregarious in evergreen broadleaf forest. ADDITIONAL SPECIMENS EXAMINED. — China. Guangdong Province, Zhaoqing City, Dinghushan Biosphere Reserve, on the ground in broadleaf forest, 2.VI.2018, S. Y. Zhou K18060208 (GDGM 79719). DESCRIPTION Basidiomata Medium to large sized, agaricoid. Pileus 7-9 cm in diameter, applanate with a depressed center to concave when mature; surface dry, not viscid, grayish-brown to tan, cracking into reticulum; margin slightly undulate or upward, striate. Lamellae Adnate to decurrent, distant (3-4 pieces of lamellae and lamellulae/cm at the margin of pileus), thick, firm, irregularly unequal; light brown to ochre; gill edge concolorous, but becoming tan to dark brown from drying out when old. Stipe 4-6 × 2.4-3 cm, central to eccentric, cylindrical, mostly tapering downwards or slightly curving, solid, off-white. Context White, unchanging, 3-5 mm thick near stipe. Odour Unpleasant. Taste Not taken. Spore print White. Basidiospores Subglobose to ellipsoid, [40/2/2] (3.9-) 4.1-4.4-4.7 (-5.1) × (3.4-) 3.5-3.7-4.0 (-4.3) µm, Q = (1.09-) 1.10-1.18-1.29 (-1.30); ornamentations amyloid, composed of dense warts, some fused into ridges, forming a partial reticulum; suprahilar spot inamyloid. Basidia (24-) 26.5-32-39 (-42.5) × 4.5-6-7.5µm, clavate to cylindrical, 1-, 2-, 3- or 4-spored, hyaline or containing granular contents. Lamellar trama Composed of nested sphaerocytes surrounded by connective hyphae. Pleurocystidia (60.5-) 71-98-136 (-146.5) × 3.5-4.5-6µm, narrowly cylindrical or flexuous with obtuse, mucronate, moniliform or sometimes forked apices, thin-walled, filled with refractive contents, unchanging in SV. Cheilocystidia Resembling pleurocystidia. Marginal cells Not differentiated. Pileipellis A cutis, 70-110 µm thick, strongly gelatinized, orthochromatic in cresyl blue; hyphae 2-6 µm wide, narrowly cylindrical, septate, often with brown pigments; terminal cells (22-) 26-35.5-58 (-63) × 3-5-6 (-7) µm, cylindrical to narrowly clavate with obtuse or slightly acute apices, sometimes with brown pigments. Pileocystidia (53.5-) 55-62.5-76 (-90.5) × 3-4.5-7.5 µm, cylindrical to fusiform with obtuse, mucronate or forked apices, some filled with refractive contents, negative in SV. Stipitipellis A cutis; hyphae 1.5-4 µm wide, narrowly cylindrical, septate, many with brown pigments; terminal cells cylindrical or lageniform with obtuse apices. Caulocystidia Cylindrical to narrowly clavate with obtuse or slightly acute apices, up to 7 µm wide, thin-walled, filled with refractive contents. Clamp connections Absent. NOTES Both our phylogenetic analyses place our species firmly in sect. Polyphyllae Buyck & V.Hofst., being closely related to the North American R. eccentrica and already separated by a much longer branch from the Indian R. khanchanjungae Van de Putte, K. Das & Buyck (Fig. 2). BLAST results of its ITS sequence in GenBank show top scores that are all et al. 2014). Russula ochrobrunnea S.Y.Zhou, Y.Song & L.H.Qiu, sp. nov., resembles R. eccentrica in overall morphology, but the latter has pink lamellae and much larger basidiospores (6-7.8 × 5-6 µm) and basidia (52-69 × 6.5-9.5 µm) (Adamčík et al. 2018). Russula cartaginis Buyck & Halling, described from Costa Rica (Buyck & Halling 2004) differs from R. eccentrica and our species in the presence of a brownish gill edge resulting from the presence of colored, branching marginal cells. Typical for most Polyphyllae is the often distinctly inflated lower portion of hymenial cystidia. The Indian species R. khanchanjungae differs particularly by its crowded and forked lamellae becoming brown when bruised, and by the viscid and brown stipe with surface finely cracking exactly as the pileus surface; it also has much larger basidiospores (7.3-9.4 × 6.3-7.8 µm) and basidia (49-61 × 8-12 µm), as well as wider pleurocystidia (8-10 µm in width) (Das et al. 2010). Also R. purpureonigra differs principally in its larger spores and crowded lamellae (Manimohan & Latha 2011)., Published as part of Zhou, Songyan, Song, Yu, Chen, Kaixing, Li, Jingwei, Buyck, Bart & Qiu, Lihong, 2020, Three novel species of Russula Pers. subg. Compactae (Fr.) Bon from Dinghushan Biosphere Reserve in southern China, pp. 219-234 in Cryptogamie, Mycologie 20 (14) on pages 232-233, DOI: 10.5252/cryptogamie-mycologie2020v41a14, http://zenodo.org/record/7814990, {"references":["PARK M. S., LEE H., OH S., JUNG P. E., SEOK S. J., FONG J. J. & LIM Y. W. 2014. - Species delimitation of three species within the Russula subgenus Compacta in Korea: R. eccentrica, R. nigricans, and R. subnigricans. Journal of Microbiology 52: 631 - 638. https: // doi. org / 10.1007 / s 12275 - 014 - 4168 - z","ADAMCIK S., JANCOVICOVA S. & BUYCK B. 2018. - The Russulas Described by Charles Horton Peck. Cryptogamie, Mycologie 39 (1): 3 - 108. https: // doi. org / 10.7872 / crym / v 39. iss 1.2018.3","BUYCK B. & HALLING R. 2004. - Two new Quercus - associated Russulas from Costa Rica and their relation to some very rare North American species. Cryptogamie, Mycologie 25 (1): 3 - 13.","DAS K., PUTTE K. V. & BUYCK B. 2010. - New or interesting Russula from Sikkim Himalaya (India). Cryptogamie, Mycologie 31 (4): 373 - 387.","MANIMOHAN P. & LATHA K. P. D. 2011. - Observations on two rarely collected species of Russula. Mycotaxon 116: 125 - 131. https: // doi. org / 10.5248 / 116.125"]}

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