548 research outputs found
FIGURE. Entoloma argus: a–c. basidiocarps; d. basidiospores; e. cheilocystidia; f. pileipellis (a, d–f, from LE F-312694, holotype; b–c, from LE F-315915). Scale bars a–c 1 cm, d–f 10 μm. Photos by O. Morozova. in Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position
No full textFIGURE. Entoloma argus: a–c. basidiocarps; d. basidiospores; e. cheilocystidia; f. pileipellis (a, d–f, from LE F-312694, holotype; b–c, from LE F-315915). Scale bars a–c 1 cm, d–f 10 μm. Photos by O. Morozova.Published as part of Morozova, Olga, Popov, Eugene, Alexandrova, Alina, Pham, Thi Ha Giang & Noordeloos, Machiel Evert, 2022, Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position, pp. 1-21 in Phytotaxa 549 (1) on page 9, DOI: 10.11646/phytotaxa.549.1.1, http://zenodo.org/record/660526
FIGURE. Entoloma argus: a–c. basidiocarps; d. basidiospores; e. cheilocystidia; f. pileipellis (a, d–f, from LE F-312694, holotype; b–c, from LE F-315915). Scale bars a–c 1 cm, d–f 10 μm. Photos by O. Morozova. in Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position
No full textFIGURE. Entoloma argus: a–c. basidiocarps; d. basidiospores; e. cheilocystidia; f. pileipellis (a, d–f, from LE F-312694, holotype; b–c, from LE F-315915). Scale bars a–c 1 cm, d–f 10 μm. Photos by O. Morozova.Published as part of Morozova, Olga, Popov, Eugene, Alexandrova, Alina, Pham, Thi Ha Giang & Noordeloos, Machiel Evert, 2022, Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position, pp. 1-21 in Phytotaxa 549 (1) on page 9, DOI: 10.11646/phytotaxa.549.1.1, http://zenodo.org/record/660526
FIGURE. Entoloma icarus: a–c. basidiocarps; d. basidiospores; e. cheilocystidia; f. pileipellis (all from LE F-312696, holotype). Scale bars a–c 1 cm, d–f 10 μm. Photos a by E. Popov, b–f by O. Morozova. in Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position
No full textFIGURE. Entoloma icarus: a–c. basidiocarps; d. basidiospores; e. cheilocystidia; f. pileipellis (all from LE F-312696, holotype). Scale bars a–c 1 cm, d–f 10 μm. Photos a by E. Popov, b–f by O. Morozova.Published as part of Morozova, Olga, Popov, Eugene, Alexandrova, Alina, Pham, Thi Ha Giang & Noordeloos, Machiel Evert, 2022, Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position, pp. 1-21 in Phytotaxa 549 (1) on page 13, DOI: 10.11646/phytotaxa.549.1.1, http://zenodo.org/record/660526
Entoloma argus O. V. Morozova, E. S. Popov, A. V. Alexandrova & Noordeloos 2022, sp. nov.
No full textEntoloma argus O.V. Morozova, E.S. Popov, A.V. Alexandrova & Noordeloos, sp. nov. (Figs. 3, 4) Mycobank: MB 843250 Type:— VIETNAM. Gia Lai Province, K’Bang District, Son Lang Commune, Kon Chu Rang Nature Reserve, N 14.505520°, E 108.541610°, 1050 m a.s.l., on soil in middle-mountain evergreen mixed forest with a predominance of Podocarpaceae (Dacrydium elatum, Dacrycarpus imbricatus), Magnoliaceae, Burseraceae (Canarium), Myrtaceae (Syzygium), 26 May 2016, O.V. Morozova (holotype: LE F-312694 (!), isotype in VRTC (!), ITS sequence GenBank OM987263, LSU sequence GenBank OM996175). Etymology:—Ἄργος (Greek), Argus (Lat.) a character from ancient Greek mythology. Argos was a one hundred-eyed giant who paid a service to the goddess Hera. Zeus killed the giant, but Hera remembered the giant by placing his one hundred eyes on the tail of the peacock. His name is used in various combinations in the generic and species names of butterflies of the Lycaenidae (Cupidinidae) family. The new Entoloma species is named after the butterfly Plebejus argus, due to the similarity of color. Diagnosis:— Entoloma argus is characterized by the delicate greyish blue basidiomata with the distinctly translucently striate pileus covered by small dark blue squamules on a paler greyish blue background with contrasting dark blue centre, and the smooth, polished stipe concolorous with pileus. Microscopically, the sterile lamella edge of cylindrical to narrowly clavate colorless cystidia, and rather small 5–6 angled spores are characteristic. Description:— Basidiomata small to medium-sized, collybioid. Pileus 15‒25 mm diam., hemispherical to convex soon expanding to plano-convex with flat to slightly depressed centre, with deflexed then straight margin, hygrophanous, translucently striate almost up to the centre, greyish blue (21 C –D4–7), covered with dark blue squamules, glabrescent with age and discoloring to greyish beige, with dark blue (21 F 6–8) fibrillose center. Lamellae moderately distant, adnate-emarginate, ventricose, white, becoming pinkish, with entire edge concolorous with faces. Stipe 30–60 × 1–1.5 mm, cylindrical, smooth, polished, greyish blue, concolorous with pileus (21 C –D4–7), with white tomentum at base. Context white, greyish under the surface. Smell indistinct, taste not reported. Basidiospores (8.5–)9.5–10(–11.4) × (6.0–)6.5–7(–7.5) μm, Q = (1.3–)1.45–1.5(–1.6), heterodiametrical, with 5–6 angles in side-view. Basidia 24–34 × 8.5–11.5 μm, 1–2-spored or 4-spored, narrowly clavate to clavate, clampless. Cheilocystidia 33–53 × 7.5–14 μm, cylindrical to narrowly clavate, sometimes septate, not pigmented, forming a sterile lamellae edge. Pileipellis a cutis of cylindrical hyphae 2–7 μm diam with trichodermal bundles of ascending hyphae with cylindrical to narrowly clavate terminal elements (46–86 × 14–20 μm) forming the macroscopic squamules and central disk of pileus. Clamp connections absent. Habitat and distribution:—In small groups in middle-mountain evergreen mixed forests. Known from Vietnam. Additional specimens examined:— VIETNAM. Gia Lai Province, K’Bang District, Son Lang Commune, Kon Chu Rang Nature Reserve, on soil in middle-mountain evergreen mixed forest with a predominance of Podocarpaceae (Dacrydium elatum, Dacrycarpus imbricatus), Magnoliaceae, Burseraceae (Canarium), Myrtaceae (Syzygium), path to the waterfall, N 14.51361°, E 108.54621°, 1007 m a.s.l., 25 May 2016, A. Alexandrova (LE F-315916 (!), ITS sequence GenBank OM 987264); ibid., N 14.505520°, E 108.541610°, 1050 m a.s.l., 28 May 2016, I. Semenyuk and E. Popov (LE F-312695 (!), ITS sequence GenBank OM 987262); ibid., on the river bank, 28 May 2016, O. V. Morozova (LE F-315915 (!), ITS sequence GenBank OM 987265). Notes:— Entoloma argus is distinguished from the macromorphologically similar E. ekaterinae O.V. Morozova, Noordel., K. Nara, Dima & Brandrud, in Crous et al. (2019: 413) from the Russian Far East by the more applanate pileus, different pileipellis structure and shape of the cheilocystidia (cylindrical vs. broadly clavate and subglobose). E. subcaesiellum Noordeloos & O.V. Morozova (2010: 243) also described from the Russian Far East possesses a less squamulose pileus with blue squamules on a greyish beige background and microscopically lacks a distinct trichoderm at pileal center. The European E. phaeodiscum Vila & F. Caballero (2007: 41) differs by the absence of cheilocystidia, less pronounced, fading blue coloration, and geographical distribution.Published as part of Morozova, Olga, Popov, Eugene, Alexandrova, Alina, Pham, Thi Ha Giang & Noordeloos, Machiel Evert, 2022, Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position, pp. 1-21 in Phytotaxa 549 (1) on pages 8-10, DOI: 10.11646/phytotaxa.549.1.1, http://zenodo.org/record/660526
FIGURE. Entoloma argus: a. basidiospores; b, c. basidia; d. cheilocystidia (a, b, d, from LE F-312694, holotype; c, from LE F-315915). Scale bars 10 μm. Drawings by O. Morozova. in Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position
No full textFIGURE. Entoloma argus: a. basidiospores; b, c. basidia; d. cheilocystidia (a, b, d, from LE F-312694, holotype; c, from LE F-315915). Scale bars 10 μm. Drawings by O. Morozova.Published as part of Morozova, Olga, Popov, Eugene, Alexandrova, Alina, Pham, Thi Ha Giang & Noordeloos, Machiel Evert, 2022, Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position, pp. 1-21 in Phytotaxa 549 (1) on page 10, DOI: 10.11646/phytotaxa.549.1.1, http://zenodo.org/record/660526
Micropsalliota suricatoides D. D. Ivanova, O. V. Morozova & T. H. G. Pham 2023, sp. nov.
No full text<i>Micropsalliota suricatoides</i> D.D. Ivanova, O.V. Morozova & T.H.G. Pham, <i>sp. nov.</i> (Fig. 5) <p>Mycobank: MB849328</p> <p> Type:— VIETNAM, Dong Nai Province: Vinh Cuu District, Dong Nai Cultural and Nature Reserve, tropical polydominant mixed forest, on soil, 13.06.2011, coll. <i>O. V. Morozova</i>, 280 VN 11 (holotype: LE F-348072!, isotype: VRTC!).</p> <p> Etymology:—Referring to beige clusters of basidiomata with fine fibrillose squamules on caps that remind mobs of meerkats (<i>Suricata suricata</i>).</p> <p>Diagnosis:—This species is characterized by having small size of beige basidiomata, staining yellow when bruised, pileus with brown squamules, utriform and lageniform cheilocystidia, and stipitipellis hyphae with capitate apices.</p> <p> Description: <i>Basidiomata</i> small, beige when fresh, yellow when bruised (3 B 7–8), discoloring to light brown (6D4), brown (6 E 6–4) or dark brown (6 F 4–7) when dried. <i>Pileus</i> 4–13 mm in diameter, campanulate when young, convex when mature; surface dry, beige, brownish orange, greyish orange (5 C 3, 5 B 3), squamulose, darker towards the center due to presence of fine, fibrillose, brown (7 E 8–5) squamules which are located denser in the center; margin white or beige, fibrillose; the surface reddish brown (8 E 4) in KOH. <i>Lamellae</i> free, crowded, 1 mm broad, cream, intercalated with lamellulae. <i>Stipe</i> 16–28 × 0.5–1 mm, cylindrical, greyish brown (6D3) or brownish beige (6 E 3); covered with tiny white fibrillose scales. <i>Annulus</i> persistent, pendent, single, white or concolorous with the pileus.</p> <p> <i>Basidiospores</i> (4.2–)5.4–6.7 × (2.7–)3.2–4.5 µm, Q = 1.31–1.82, Q m = 1.6 (n = 21), amygdaliform in side view, ellipsoid in frontal view, with apical endosporal thickening. <i>Basidia</i> (12–)13.6–14.8(–16.9) × 5.4–6.9 µm, clavate, 2- and 4-spored, hyaline. <i>Cheilocystidia</i> (13.7–)19.5–22.0(–30.2) × (5.1–)9.3–8.8(–13.5) µm, utriform and lageniform, necks and capitula absent. <i>Pleurocystidia</i> absent. <i>Pileipellis</i> a cutis, composed of hyphae 5–8(–10) µm, constricted at the septa, incrusted with brownish pigment. <i>Stipitipellis</i> of cylindrical hyphae 5–8 μm wide, many with capitate apices.</p> <p>Habitat and distribution:—In small groups on soil in tropical evergreen mixed forest. Known only from the type locality in southern Vietnam.</p> <p> Additional specimens examined: VIETNAM, Dong Nai Province:Vinh Cuu District, Dong Nai Cultural and Nature Reserve, tropical polydominant mixed forest, on soil, 14 June 2011, coll. <i>O. V. Morozova</i> LE F-348071 (303 VN 11). Gia Lai Province: K’Bang District, Son Lang Commune, Kon Chu Rang Nature Reserve, polydominant evergreen broadleaf, mixed (dominated by trees from Podocarpaceae, Theaceae, Magnoliaceae, Fagaceae, Hamamelidaceae, Lauraceae, Burseraceae, Myrtaceae, Clusiaceae, Fabaceae) and coniferous (dominated by <i>Dacrydium elatum</i>) forest, 14°28’09.9”N 108°32’24.8”E, elevation 923 m, on soil, 28 October 2022, LE F-348070 (209 NVP 22), coll. <i>N. V. Psurtseva</i>; 27 October 2022, coll. <i>V. A. Dudka</i>, LE F-348069 (222 VN 22).</p> <p> Notes: <i>Micropsalliota suricatoides</i> is characterized by having small basidiomata, basidiomata staining yellow when bruised, beige pileus with brown squamules, utriform and lageniform cheilocystidia, pileipellis hyphae with brownish pigment and stipitipellis hyphae with capitate apices. Two of the specimens from Vietnam has a distinguishable dark umbo (LE F-348070 and LE F-348069). <i>Micropsalliota brunneola</i> Heinem. possesses a larger (20-30 mm in diameter) brown squamulose pileus without umbo, smaller spores (4.1–4.9 × 2.9–3.3 μm), much broader pileipellis hyphae of 8–20 μm in diameter (Heinemann 1980: 46). <i>Micropsalliota allantoidea</i> R.L. Zhao, Desjardin, K. Soytong & K. D. Hyde shares scaly convex pileus, but has brown lamellae, ventricose-capitate cheilocystidia and pileipellis hyphae 8–17 μm in diameter (Zhao <i>et al.</i> 2010: 15). <i>Micropsalliota megaspora</i> R.L. Zhao, Desjardin, Soytong & K.D. Hyde has larger spores (6–8 × 3.8–4.5 μm), ventricose to pyriform cheilocystidia, broader pileipellis hyphae 10–22 μm in diameter. (Zhao <i>et al.</i> 2010: 64). <i>Micropsalliota brunneosquamata</i> L.J. Chen, R.L. Zhao & K.D. Hyde possesses much bigger basidiomata (pileus 31–40 mm in diameter), stipe heavily covered by brown fibrils under annulus with bulbous base, cheilocystidia various in shape, and broader pileipellis hyphae 5–25μm diameter (Chen <i>et al.</i> 2016: 692).</p>Published as part of <i>Ivanova, Daria, Morozova, Olga & Pham, Thi Ha Giang, 2023, Three new species of Micropsalliota (Agaricaceae, Basidiomycota) from central and southern Vietnam, pp. 247-258 in Phytotaxa 626 (4)</i> on pages 254-255, DOI: 10.11646/phytotaxa.626.4.2, <a href="http://zenodo.org/record/10212911">http://zenodo.org/record/10212911</a>
FIGURE. Entoloma arion: a–c. basidiocarps; d. cheilocystidia; e. basidiospores; f. pileipellis; g. caulocystidia (all from LE F-312691, holotype). Scale bars a–c 1 cm, d–g 10 μm. Photos by O. Morozova. in Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position
No full textFIGURE. Entoloma arion: a–c. basidiocarps; d. cheilocystidia; e. basidiospores; f. pileipellis; g. caulocystidia (all from LE F-312691, holotype). Scale bars a–c 1 cm, d–g 10 μm. Photos by O. Morozova.Published as part of Morozova, Olga, Popov, Eugene, Alexandrova, Alina, Pham, Thi Ha Giang & Noordeloos, Machiel Evert, 2022, Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position, pp. 1-21 in Phytotaxa 549 (1) on page 11, DOI: 10.11646/phytotaxa.549.1.1, http://zenodo.org/record/660526
FIGURE. Entoloma arion: a. basidiospores; b. basidia; c. cheilocystidia; d. caulocystidia; e. pileipellis (all from LE F-312691, holotype). Scale bars 10 μm. Drawings by O. Morozova. in Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position
No full textFIGURE. Entoloma arion: a. basidiospores; b. basidia; c. cheilocystidia; d. caulocystidia; e. pileipellis (all from LE F-312691, holotype). Scale bars 10 μm. Drawings by O. Morozova.Published as part of Morozova, Olga, Popov, Eugene, Alexandrova, Alina, Pham, Thi Ha Giang & Noordeloos, Machiel Evert, 2022, Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position, pp. 1-21 in Phytotaxa 549 (1) on page 12, DOI: 10.11646/phytotaxa.549.1.1, http://zenodo.org/record/660526
Entoloma arion O. V. Morozova, E. S. Popov, T. H. G. Pham & Noordeloos 2022, sp. nov.
No full textEntoloma arion O.V. Morozova, E.S. Popov, T.H.G. Pham & Noordeloos, sp. nov. (Figs. 5, 6) Mycobank: MB 843251 Type:— VIETNAM. Gia Lai Province, K’Bang District, Son Lang Commune, Kon Chu Rang Nature Reserve, N 14.487996°, E 108.57101°, 960 m a.s.l., on soil along a track in middle-mountain evergreen mixed forest with a predominance of Podocarpaceae (Dacrydium elatum, Dacrycarpus imbricatus), Magnoliaceae, Burseraceae (Canarium), Myrtaceae (Syzygium), 29 May 2016, O.V. Morozova and E.S. Popov (holotype: LE F-312691 (!), isotype in VRTC (!), ITS sequence GenBank OM987259, LSU sequence GenBank OM996176). Etymology:—Ἀρίων (Greek), Aríon (Lat.) a Greek poet, singer and musician who played the cithara (7–6th centuries BC). According to legend, Arion sailed with rich treasures on a ship to Corinth. The sailors, wanting to take possession of the singer’s wealth, threw him overboard, but Arion was rescued by a dolphin and safely reached Corinth. A butterfly Phengaris arion of the Lycaenidae (Cupidinidae) family with a blue upper and a light under surface of the wings was named after him. Our new species is similar to it in colors. Diagnosis:— Entoloma arion is characterized by the bright blue, radially fibrillose pileus with rather dark blue central spot and scales at first densely covering whole surface, moving apart with pileus expansion, showing a whitish or light blue background, and a white stipe that is minutely innately fibrillose and pruinose at the apex. Microscopically, cylindrical to broadly clavate septate cheilocystidia and caulocystidia in the form of bundles of long hairs are distinctive. Description:— Basidiomata small to medium-sized, collybioid. Pileus 10‒25 mm diam., hemisphaerical, convex, soon expanding to plano-convex with flat to slightly depressed centre, with deflexed then straight margin, non hygrophanous, non translucently striate, radially fibrillose, at first entirely densely covered with dark blue to blackish blue squamules (20 E – F 6–8), moving apart with pileus expansion showing whitish or light blue (20 B – C 4–6) background, with fibrillose, contrasting blackish blue centre. Lamellae moderately distant, broadly adnate, slightly emarginate with a small tooth, segmentiform to arcuate, white, or pale bluish in young basidiomata, becoming pinkish, with irregular concolorous edge. Stipe 30–70 × 1.5–2 mm, cylindrical, minutely innately fibrillose, pruinose in upper part, translucent, white or pale bluish in young basidiomata. Context white. Smell indistinct, taste not reported. Basidiospores (9.5–)10.5–12(–13) × (6.5–)7–7.5(–8.5) μm, Q = (1.3–)1.5(–1.7), heterodiametrical, with 5–6 angles in side-view. Basidia 23–30 × 9–12 μm, 1–2-or 4-spored, narrowly clavate to clavate, clampless. Cheilocystidia 27–78 × 7–18 μm, cylindrical or narrowly to broadly clavate, often septate, not pigmented, forming a sterile lamellar edge or intermixed with basidia. Pileipellis a cutis with transition to a trichoderm, composed of repent cylindrical hyphae 4–8 μm diam with narrowly clavate to fusoid ascending terminal elements 70–210 × 15–25 μm, a trichoderm at center. Caulocystidia in the form of bundles of hairs up to 200 μm long composed of chains of cylindrical cells 23–44 × 5–10 μm. Clamp connections absent. Habitat and distribution:—In small groups in the middle-mountain evergreen mixed forests. Known only from Vietnam. Additional specimens examined:— VIETNAM. Gia Lai Province, K’Bang District, Son Lang Commune, Kon Chu Rang Nature Reserve, N 14.49776°, E 108.556993°, 975 m a.s.l., on soil along a track in middle-mountain evergreen mixed forest with a predominance of Podocarpaceae (Dacrydium elatum, Dacrycarpus imbricatus), Magnoliaceae, Burseraceae (Canarium), Myrtaceae (Syzygium), 28 May 2016, O.V. Morozova and E.S. Popov (LE F-312692 (!), ITS sequence GenBank OM987260; LE F-315917 (!), ITS sequence GenBank OM987261). Notes:— Entoloma arion can be easily recognized by the bright blue pileus and contrasting white stipe, a very rare combination in subgenus Cyanula. Entoloma floccosodentatum Corner & E. Horak, in Horak (1980: 288) from New Caledonia is superficially similar in colors, spore size and cystidia form, but its pileus is pale blue and smooth, or only innately fibrillose, or tomentose. The presence of clamps on the hyphae indicates that Entoloma floccosodentatum does not belong to the subgenus Cyanula. Geographically it is also very distant and isolated.Published as part of Morozova, Olga, Popov, Eugene, Alexandrova, Alina, Pham, Thi Ha Giang & Noordeloos, Machiel Evert, 2022, Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position, pp. 1-21 in Phytotaxa 549 (1) on pages 10-13, DOI: 10.11646/phytotaxa.549.1.1, http://zenodo.org/record/660526
Entoloma daphnis O. V. Morozova, Kovalenko, E. S. Popov & Noordeloos 2022, sp. nov.
No full textEntoloma daphnis O.V. Morozova, Kovalenko, E.S. Popov & Noordeloos, sp. nov. (Figs. 9, 10) Mycobank: MB 843253 Type:— VIETNAM. Dong Nai Prov., Tan Phu Dist., Cat Tien National Park, “ Lagerstroemia trail” near the Park’s Headquarters, N 11.426667°, E 107.426389°, 125 m a.s.l., on fallen log in lowland semi-deciduous tropical forest, 14 June 2010, A. Kovalenko (holotype: LE F-262915 (!), as Entoloma nubilum in Morozova et al. 2012, ITS sequence GenBank OM987266, LSU sequence GenBank OM996177). Etymology:—Δάφνις, from δάφνη–laurel (Greek), in Greek mythology, a beautiful young shepherd in Sicily and inventor of pastoral songs, the son of Hermes (Mercury). The butterfly Polyommatus daphnis was named after him. The new Entoloma species is named after this butterfly, due to the similar color. Diagnosis:— Entoloma daphnis is characterized by small pleurotoid basidiomata, small spores with up to the 8 angles, a trichodermal pileipellis (pileus is densely covered by dark blue fibrils) and lack of cheilocystidia. Description:— Basidiomata small, pleurotoid. Pileus 3–7 mm diam., cupulate then reniform with incurved then lobate margin, non hygrophanous, slightly translucently striate, tomentose to finely squamulose, deep blue to dark blue (20D8, 20E7–8). Lamellae moderately distant intermixed with lamellulae, adnate or slightly emarginate, whitish to bluish near the pileal margin then pinkish with concolorous entire edge. Stipe 3–4 × 0.5–1 mm, reduced, eccentric or lateral, curved, pruinose to tomentose, concolorous with the pileus or slightly paler (20D7), with white arachnoid mycelial strands at the base attached to the substratum. Context thin, bluish, under the surface dark blue. Odor indistinct, taste not reported. Basidiospores (7–)8.3(–9) × (5.5–)5.7(–6) μm, Q = (1.3–)1.45(–1.6), heterodiametrical, with 6–8 angles in sideview. Basidia 23–31 × 9–12 μm, clavate, clampless. Lamellae edge fertile. Cheilocystidia and pleurocystidia absent. Pileipellis a trichoderm of long hairs, composed of chains of cylindrical cells narrower at the apical part (27–62 × 5.5–6.5 μm), broader at the base (27–62 × 5.5–6.5 μm) with dark blue intracellular pigment. Clamp connections, oleiferous hyphae and brilliant granules absent. Notes:— Entoloma cyanomelaenum possesses larger (9–11 × 5.5–6.5 μm) spores and its pileus turns red in KOH (Boedijn 1929; Horak 1980); E. gainsvillae has slightly larger spores (8–10 × 6–7 μm) and a smooth pileus (Murrill 1943; Hesler 1967); E. nubilum differs from E. daphnis by differently-shaped (5–7 angled) spores, a cutis-type pileipellis, and habitat on decaying leaves or on humus (Manimohan et al. 2002); E. icarus possesses larger (10–13 × 7–9 μm) differently-shaped (with 5–7 sharp angles) spores and cheilocystidia.Published as part of Morozova, Olga, Popov, Eugene, Alexandrova, Alina, Pham, Thi Ha Giang & Noordeloos, Machiel Evert, 2022, Four new species of Entoloma (Entolomataceae, Agaricomycetes) subgenera Cyanula and Claudopus from Vietnam and their phylogenetic position, pp. 1-21 in Phytotaxa 549 (1) on pages 15-16, DOI: 10.11646/phytotaxa.549.1.1, http://zenodo.org/record/660526
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