identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
039387C1D5640002FE6AF98CFE4FFBF4.text	039387C1D5640002FE6AF98CFE4FFBF4.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mycena atlantica M. Villarreal & Couceiro 2026	<div><p>Mycena atlantica M.Villarreal &amp; Couceiro sp. nov.</p><p>MycoBank: MB 857443</p><p>Figs 2–4, 19</p><p>Diagnosis</p><p>Mycena atlantica sp. nov. is macromorphologically similar to M. alphitophora, but differs in having a bigger size. Micromorphologically, it differs in having slightly smaller basidiospores 6.1‒7.8 × 4‒5.5 µm (vs 8.1‒9.7 × 4.5‒5.5 µm for M. alphitophora) and by the presence of cherocytes in the pileipellis as well as a different nrITS molecular sequence.</p><p>Etymology</p><p>From Latin “Atlantĭcus”, from Greek “Ἀτλαντικός =Atlantikos”, the name has been extended since ca 1600 to the ocean between Europe and Africa, on one side, and America on the other.</p><p>Type material</p><p>Holotype</p><p>SPAIN • Coruña, Paio, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.168056&amp;materialsCitation.latitude=43.22861" title="Search Plazi for locations around (long -8.168056/lat 43.22861)">Oza de los Ríos</a>; 43°13′43ʺ N, 8°10′05ʺ W; 105 m a.s.l.; 17 Jun. 2022; A. Couceiro s.n.; bark of Salix atrocinerea; GenBank no.: PV037609 (ITS); AH [AH59663].</p><p>Additional material examined</p><p>SPAIN • A Coruña, Paio, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.168056&amp;materialsCitation.latitude=43.22861" title="Search Plazi for locations around (long -8.168056/lat 43.22861)">Oza de los Ríos</a>; 43°13′43ʺ N, 8°10′05ʺ W; 105 m a.s.l.; 9 Jun. 2019; A. Couceiro s.n.; bark of Salix atrocinerea; AH [AH59664] • A Coruña, Ortigueira, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.846528&amp;materialsCitation.latitude=43.69775" title="Search Plazi for locations around (long -7.846528/lat 43.69775)">Sta. Marta de Ortigueira</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.846528&amp;materialsCitation.latitude=43.69775" title="Search Plazi for locations around (long -7.846528/lat 43.69775)">Playa de Morouzos</a>; 43°41′51.9ʺ N, 7°50′47.5ʺ W; 9 m a.s.l.; 6 Nov. 2024; A. Cortés-Pérez, A. Couceiro &amp; M. Villarreal s.n.; bark of Salix atrocinerea; AH [AH60332] • same locality as for preceding; 26 Dec. 2024; A. Couceiro s.n.; bark of a living trunk of Salix atrocinerea; ACN [ACN2024122600] • A Coruña, Cerdido, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.9030557&amp;materialsCitation.latitude=43.5925" title="Search Plazi for locations around (long -7.9030557/lat 43.5925)">San Xoan dos Casás</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.9030557&amp;materialsCitation.latitude=43.5925" title="Search Plazi for locations around (long -7.9030557/lat 43.5925)">Fraga de os Casás</a>; 43°35′33ʺ N, 7°54′11ʺ W; 125 m a.s.l.; 2 Apr. 2022; A. Couceiro s.n.; bark of Salix atrocinerea; ACN [ACN2022040200] • Pontevedra, Cangas do Morrazo, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.850556&amp;materialsCitation.latitude=42.269444" title="Search Plazi for locations around (long -8.850556/lat 42.269444)">Santo Andre do Hío</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.850556&amp;materialsCitation.latitude=42.269444" title="Search Plazi for locations around (long -8.850556/lat 42.269444)">Playa de Barra</a>; 42°16′10ʺ N, 8°51′02ʺ W; 34 m a.s.l.; 20 Dec. 2024; A. Couceiro s.n.; bark of a living trunk of Salix atrocinerea; ACN [ACN2024122000] • La Palma, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-17.796667&amp;materialsCitation.latitude=28.793888" title="Search Plazi for locations around (long -17.796667/lat 28.793888)">Los Tilos Biosphere Reserve</a>; 28°47′38ʺ N, 17°47′48ʺ W; 680 m a.s.l.; 4 Feb. 2022; A. Jurado &amp; M. Villarreal s.n.; bark of Ocotea foetens; AH [AH59665] • La Palma, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-17.765278&amp;materialsCitation.latitude=28.769444" title="Search Plazi for locations around (long -17.765278/lat 28.769444)">Cubo de la Galga</a>; 28°46′10ʺ N, 17°45′55ʺ W; 240 m a.s.l.; 7 Feb. 2022; A. Jurado &amp; M. Villarreal s.n.; AH [AH59667] • same locality as for preceding; 6 Feb. 2022; Genbank no.: PV037610 (ITS); AH [AH59666] • same locality as for preceding; 7 Feb. 2022; M. Villarreal s.n.; on bark of Ocotea foetens; wetted 8 Feb. 2022, harvested from batch moist chambers on 20 Mar. 2022; AH [AH59668] .</p><p>PORTUGAL • Madeira, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-17.1175&amp;materialsCitation.latitude=32.804443" title="Search Plazi for locations around (long -17.1175/lat 32.804443)">Ribeira do Seixal</a>; 32°48′16ʺ N, 17°07′03ʺ W; 570 m a.s.l.; 16 Feb. 2024; A. Couceiro, C. Sos &amp; M. Villarreal s.n.; decaying wood of Laurus novocanariensis; GenBank no.: PV037611 (ITS); AH [AH60089] • Sao Miguel, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-25.786667&amp;materialsCitation.latitude=37.83583" title="Search Plazi for locations around (long -25.786667/lat 37.83583)">Ponta Delgada</a>, 37°50′09ʺ N, 25°47′12ʺ W; 570 m a.s.l.; 6 Feb. 2025; A. Couceiro, C. Sos &amp; M. Villarreal s.n.; trunk of Laurus azorica; AH [AH60346] .</p><p>Description</p><p>Pileus 2–4(–5.5) mm diam., initially hemispherical to paraboloid, expanding to obtusely conic or broadly convex when ageing; margin translucent striated, crenulate, old very thin-fleshed; surface in young covered all over with groups of purely white ‘sugar-like’ granules or flakes, initially forming a closed layer, soon breaking up to a non-contiguous layer upon a white or a very pale grey surface, when mature still bearing small amounts of granules especially in the disc, white. Lamellae adnexed to narrowly adnate, subventricose to ventricose, (8–)10–13 reaching the stipe, with 1–3 series of lamellulae of variable length, white. Stipe 8–32 × 0.1–0.2(–0.4) mm, central, cylindrical, slightly widened at the base; initially longitudinally striated, surface entirely hirsute, watery white to watery grey; devoid of basal disc. Basidiomata greyish when dried. Odour and taste absent.</p><p>Basidiospores (6.1‒)6.4‒7.2(‒7.8) × (4‒)4.2‒4.9(‒5.5) µm; Q = (1.3‒)1.4‒1.6(‒1.7); n = 100; Me = 6.8 × 4.5 µm; Qe = 1.5, ellipsoid or broadly ellipsoid to oblong, smooth, hyaline, amyloid, thin-walled, with one or two guttules. Basidia 13‒21 × 4.8‒7.3 µm, short clavate to obpyriform, 4-spored, rarely 2-spored, sterigmata 1.5–3 µm long, hyaline. Cheilocystidia forming a sterile band, (11‒)12.6‒18.8(‒20) × (5.9‒)7‒11.4(‒13) µm, clavate to broadly clavate, spinulose in the upper part, hyaline, thin-walled; spinulae 0.5–0.95 × 0.3–0.5 µm, cylindrical to subconical. Pleurocystidia absent. Pileipellis a cutis with acanthocysts and cherocytes; hyphae 1.5–13 µm diam., spinulose or smooth, dextrinoid. Acanthocysts (10.5–)12.4–30.5(–34) × 8.9–26(–32) μm, globose, subglobose, densely spinulose, hyaline, inamyloid, thin-walled; spinulae 0.6–3 × 0.5–1.5 μm, cylindric or subconical; sometimes seen originating from septate, thin-walled, spinulose hyphae of about 2–6 µm diam. Cherocytes 8–30 × 7–23.5 µm (disregarding lobes), roundish to obtuse angular, with 2–6 conical to obtusely conical lobes, lobes extending up to 6 µm, hyaline, slightly dextrinoid, thick-walled up to 4 µm; covered with spinulae and warts hemispherical; spinulae and warts 0.45–1.5 × 0.2–0.75 µm; often seen originating from septate, slightly thick-walled spinulose hyphae of about 4 µm diam. Hypodermium composed of inflated hyphae up to 14 μm diam., hyaline, dextrinoid. Lamellar trama regular, hyphae up to 18 µm, inflated, hyaline, dextrinoid. Cortical and medullary hyphae of the stipe 2.5–16 μm diam., parallel, smooth, dextrinoid. Caulocystidia 14.8–88 × (3.6–)9.08–12.5 μm, ranging from short and broadly clavate or subcylindrical to long and cylindrical, apex even or somewhat wider, obtuse, densely and evenly spinulose overall, hyaline, inamyloid, thin-walled; spinulae 0.8–1.1(–1.8) × 0.3–0.7 μm, cylindrical or subconical. Clamp connections present.</p><p>Habitat and distribution</p><p>Scattered or gregarious on mossy trunks of Salix atrocinerea, Laurus novocanariensis, Laurus azorica and Ocotea foetens, during all seasons. Known from Galicia, La Palma (Canary Islands) in Spain, and from Sao Miguel (Azores) and Madeira in Portugal (Fig. 19).</p><p>Remarks</p><p>Mycena atlantica is characterized by its slightly robust basidiomata for a species of M. sect. Amparoina, its pure white basidiomata and its habitat, which is generally corticolous. Microscopically it shares many characteristics in common with M. alphitophora, a species originally described from Bermuda islands, which possess larger spores 7.5‒10 × 4.5–5.5 µm (Desjardin 1995) and lack cherocytes. Following the keys of Desjardin (1995), M. heteracantha (Singer) Desjardin, a species known from South America and Asia, seems to be the closest species. However, primordia and immature pilei of M. heteracantha are covered with a universal veil in the form of conic spines, which is absent in M. atlantica . Besides, it has slightly larger basidiospores (8–10.5 × 4.8–6.7 µm) and cherocytes with longer spines like projections (8–32 µm long). Based on available sequences in public databases, it appears that M. atlantica . has no known sibling species in the section, being phylogenetically very distant from both M. alphitophora and M. heteracantha .</p></div>	https://treatment.plazi.org/id/039387C1D5640002FE6AF98CFE4FFBF4	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Villarreal, Manuel;Couceiro, Antonio;Traba, José María;Cortés-Pérez, Alonso	Villarreal, Manuel, Couceiro, Antonio, Traba, José María, Cortés-Pérez, Alonso (2026): Reevaluating Mycena section Amparoina (Mycenaceae, Agaricales) in the northwestern Iberian Peninsula and Macaronesia, with descriptions of four new species and a new European record. European Journal of Taxonomy 1039: 1-41, DOI: 10.5852/ejt.2026.1039.3179, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3179/14131
039387C1D56F001EFD0FFB17FBAAF9B4.text	039387C1D56F001EFD0FFB17FBAAF9B4.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mycena biornata Singer	<div><p>Mycena biornata Singer</p><p>MycoBank: MB 317965</p><p>Figs 5–7, 19</p><p>Material examined</p><p>SPAIN • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.1455555&amp;materialsCitation.latitude=43.714447" title="Search Plazi for locations around (long -8.1455555/lat 43.714447)">Pontedeume</a>, Parroquia Santa María de Ombre, Fragas do Eume; 43°40′99ʺ N, 8°8′44ʺ W; 19 m a.s.l.; 16 Mar. 2021; A. Couceiro &amp; J.M. Traba s.n.; dead leaves of Laurus nobilis; GenBank no.: MZ393491 (ITS); AH [AH56003] • same data as for preceding; 20 May 2021; M. Villarreal s.n.; Laurus dead leaves in moist chamber; AH [AH56006] • same data as for preceding; 25 May 2021; AH [AH56024] • A Coruña, Pontedeume, Fragas do Eume; 43°42′52ʺ N, 8°11′98ʺ W; 9 m a.s.l.; 6 Dec. 2021; A. Couceiro, M. Saavedra, J.M. Traba &amp; M. Villarreal s.n.; on dead leaves of Laurus nobilis; AH [AH56025] .</p><p>MEXICO • Veracruz, Acatlán, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-96.85389&amp;materialsCitation.latitude=19.679443" title="Search Plazi for locations around (long -96.85389/lat 19.679443)">Acatlán Volcano</a>; 19°40′46ʺ N, 96°51′14ʺ W; 1930 m a.s.l.; 22 Sep. 2020; A. Cortés-Pérez 2091; tropical mountain cloud forest on leaf litter of Fagus mexicana and Quercus spp.; GenBank no.: MZ393492 (ITS); XAL [ACP2091] .</p><p>PORTUGAL • Azores, Sao Miguel, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-25.786667&amp;materialsCitation.latitude=37.83583" title="Search Plazi for locations around (long -25.786667/lat 37.83583)">Ponta Delgada</a>; 37°50′09ʺ N, 25°47′12ʺ W; 580 m a.s.l.; 6 Feb. 2025; A. Couceiro, C. Sos &amp; M. Villarreal s.n.; on dead leaves of Laurus azorica; AH [AH60365] .</p><p>Description</p><p>Primordia 0.3‒3 mm diam., subglobose to paraboloid, sessile, covered with a universal veil formed by white granules and floccons. Pileus 3‒12 mm diam., initially hemispherical to subglobose, expanding to campanulate, flattening with age; margin sulcate-striate; surface dry, granulose, from midway to the white pruinose or smooth margin, opaque, pure white or with very pale yellowish tinges; mature pilei often leaving granules only on the disc. Context white, thin, membranous. Lamellae ascending narrowly adnate to subfree, tender, ventricose, ca 25 reaching the stipe, with 1‒2 lamellulae, 0.5‒0.7 mm broad, thin, white, with subhorizontal to convex undulated concolorous edge. Stipe 14‒36 × 0.7‒1 mm, central, cylindrical, equal to subequal, sometimes with a subbulbous base, hollow; surface dry, entirely hirsute elsewhere, opaque, white; arising from a small and white granulose basal disc. Odour and taste absent.</p><p>Basidiospores (6.8‒)7.8‒9.6(‒11.5) × (3.9‒)4.3‒5.2(‒5.7) µm; Q = (1.3‒)1.6‒2(‒2.2); n = 100; Me = 8.8 × 4.8 µm; Qe = 1.8, ellipsoid to broadly ellipsoid, elongate or cylindric, smooth, hyaline, amyloid, thin-walled, with refractive guttules. Basidia 10‒20 × 8.5‒12.5 μm, broadly clavate, fourspored, with sterigmata up to 3.5 µm long, hyaline. Cheilocystidia forming a sterile band, 10‒20 × 5‒12 μm, clavate to broadly clavate, short-stalked, densely spinulose covered over much of the surface, hyaline, thin-walled; spinulae 0.9‒1.3 × 0.5 µm, cylindrical or obtusely conical. Pleurocystidia absent. Pileipellis a cutis composed of hyphae radially aligned up to 10 μm diam., clamped, smooth to densely ornamented with minute excrescences, and terminating in acanthocysts that overlap in such a way as to give a subhymenoderm appearance. Acanthocysts 10‒50 μm diam., globose, subglobose to heart-shaped, densely spinulose, hyaline, inamyloid, thin-walled; spinulae 0.6–2.5 × 0.5–1.5 µm, cylindric or subconical. Granules of the universal veil formed by neuron-shaped cherocytes 9.3‒36 × 8‒25 µm, globose, subglobose to subangular or irregular in outline, densely ornamented, provided of 5‒10 erect simple or ramified thick walled (0.6‒7.2 μm) acute projections 2‒37 μm long, hyaline or with fulvous contents, generally thickened at the base. Hypodermium composed of inflated and short-celled up to 20 μm diam., smooth, hyaline, inamyloid or strongly dextrinoid, thin-walled. Lamellar trama regular to subregular, hyphae up to 15 μm diam., inflated, short-celled, smooth, hyaline, strongly dextrinoid, thin-walled. Cortical and medullary hyphae of the stipe 5‒15 μm diam., cylindrical, short-celled smooth, hyaline, dextrinoid, thin-walled, not gelatinized. Caulocystidia 50‒420 × 8‒15 μm, cylindrical to subclavate with rounded apex, densely and evenly spinulose overall, hyaline, thin-walled or slightly thick walled up to 0.7 μm, numerous all over the stipe. Clamp connections are hard to find and only observed on the hyphae of the pileipellis.</p><p>Habitat and distribution</p><p>Scattered to gregarious on fallen leaves of several hardwoods, especially Laurus nobilis or Fagus mexicana . Known from Brazil, Mexico, Spain, and Portugal (Fig. 19).</p><p>Remarks</p><p>Mycena biornata is characterized by its white basidiomata, striking neuron-shaped cherocytes, and fruiting on fallen leaves of hardwoods, specially Laurus spp. in Spain and the Azores or Fagus mexicana in Mexico. The two sequences obtained for this species, one European and one American, are resolved as monophyletic, with maximum support (BS = 100%, BPP = 1), within the clade II of species belonging to the stirps Amparoina and Fuscinea, but without a close phylogenetic relationship with either of them. Mycena biornata was described by Singer (1973) with two varieties, M. biornata var. biornata and var. manausensis (Singer 1983), both from Brazil, the last differing from the type in having a greyish pileus and smaller spores. Both varieties of M. biornata were described with smooth cheilocystidia, which is an aberrant character for M. sect. Amparoina (Desjardin 1995), and was not described in any species of M. sect. Amparoina. Previously, Traba et al. (unpublished) proposed this species as M. lourensis nom. prov. although, considering that Singer erred in the interpretation of the cheilocystidia, given the macro- and microscopic similarities, we must accept that the species treated here is Mycena biornata . The holotype of M. biornata var. biornata does not exist and the material from M. biornata var. manausensis is extremely fragmentary and its study does not describe or illustrate the cheilocystidia, but the very typical morphology of the cherocytes and the illustrations by Singer (1983) leave no doubt as to the correct identification of this very rare species, which we rediscover a half-century later.</p></div>	https://treatment.plazi.org/id/039387C1D56F001EFD0FFB17FBAAF9B4	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Villarreal, Manuel;Couceiro, Antonio;Traba, José María;Cortés-Pérez, Alonso	Villarreal, Manuel, Couceiro, Antonio, Traba, José María, Cortés-Pérez, Alonso (2026): Reevaluating Mycena section Amparoina (Mycenaceae, Agaricales) in the northwestern Iberian Peninsula and Macaronesia, with descriptions of four new species and a new European record. European Journal of Taxonomy 1039: 1-41, DOI: 10.5852/ejt.2026.1039.3179, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3179/14131
039387C1D573001AFDCBF9D0FE48FBF3.text	039387C1D573001AFDCBF9D0FE48FBF3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mycena corynephora Maas Geest.	<div><p>Mycena corynephora Maas Geest.</p><p>MycoBank: MB 108244</p><p>Figs 8–9</p><p>Material examined</p><p>SPAIN • Gerona, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-2.5127778&amp;materialsCitation.latitude=41.776943" title="Search Plazi for locations around (long -2.5127778/lat 41.776943)">Abadía Marti de Riells</a>; 41°46′37ʺ N, 2°30′46ʺ W; 490 m a.s.l.; 25 Oct. 1994; G. Moreno, R. Pöder &amp; C. Illana s.n.; on moss-covered bark of Castanea sativa; AH [AH18321] • same locality as for preceding; IB [IB94/906] • same locality as for preceding; MCVE [MCVE030b] • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.8494444&amp;materialsCitation.latitude=43.476112" title="Search Plazi for locations around (long -7.8494444/lat 43.476112)">As Pontes</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.8494444&amp;materialsCitation.latitude=43.476112" title="Search Plazi for locations around (long -7.8494444/lat 43.476112)">San Martiño de Goente</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.8494444&amp;materialsCitation.latitude=43.476112" title="Search Plazi for locations around (long -7.8494444/lat 43.476112)">Teixedelos</a>; 43°28′34ʺ N, 7°50′58ʺ W; 536 m a.s.l.; 19 Oct. 2019; A. Couceiro s.n.; bark of Fagus sylvatica; AH [AH57610] • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.170834&amp;materialsCitation.latitude=43.229168" title="Search Plazi for locations around (long -8.170834/lat 43.229168)">Oza-Cesuras</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.170834&amp;materialsCitation.latitude=43.229168" title="Search Plazi for locations around (long -8.170834/lat 43.229168)">San Pedro de Oza de los Ríos</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.170834&amp;materialsCitation.latitude=43.229168" title="Search Plazi for locations around (long -8.170834/lat 43.229168)">Paio</a>; 43°13′45ʺ N, 8°10′15ʺ W; 103 m a.s.l.; 4 Jan. 2019; A. Couceiro s.n.; bark of Acacia melanoxylon; AH [AH57609] • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.978889&amp;materialsCitation.latitude=43.427223" title="Search Plazi for locations around (long -7.978889/lat 43.427223)">As Pontes</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.978889&amp;materialsCitation.latitude=43.427223" title="Search Plazi for locations around (long -7.978889/lat 43.427223)">Teixedelo</a>; 43°25′38ʺ N, 7°58′44ʺ W; 500 m a.s.l.; 6 Oct. 2019; A. Couceiro &amp; J.M. Traba s.n.; bark of Betula and Fagus; GenBank no.: OQ427379; PR [PR4061019661] • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.17&amp;materialsCitation.latitude=43.22861" title="Search Plazi for locations around (long -8.17/lat 43.22861)">Oza-Cesuras</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.17&amp;materialsCitation.latitude=43.22861" title="Search Plazi for locations around (long -8.17/lat 43.22861)">San Pedro de Oza de los Ríos</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.17&amp;materialsCitation.latitude=43.22861" title="Search Plazi for locations around (long -8.17/lat 43.22861)">Paio</a>; 43°13′43ʺ N, 8°10′12ʺ W; 103 m a.s.l.; 20 Jun. 2022; A. Couceiro s.n.; bark of Corylus avellana; GenBank no.: PP267933; AH [AH57612] • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.073611&amp;materialsCitation.latitude=43.07361" title="Search Plazi for locations around (long -8.073611/lat 43.07361)">Oza-Cesuras</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.073611&amp;materialsCitation.latitude=43.07361" title="Search Plazi for locations around (long -8.073611/lat 43.07361)">Nuestra Señora de Belén</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.073611&amp;materialsCitation.latitude=43.07361" title="Search Plazi for locations around (long -8.073611/lat 43.07361)">Martín</a>; 43°04′25ʺ N, 8°04′25ʺ W; 492 m a.s.l.; 6 Jan. 2025; A.Couceiro s.n.; bark of Pseudotsuga menziesii; ACN [ACN2025010600] • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.2288885&amp;materialsCitation.latitude=43.181667" title="Search Plazi for locations around (long -8.2288885/lat 43.181667)">Oza-Cesuras</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.2288885&amp;materialsCitation.latitude=43.181667" title="Search Plazi for locations around (long -8.2288885/lat 43.181667)">Dordaño</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.2288885&amp;materialsCitation.latitude=43.181667" title="Search Plazi for locations around (long -8.2288885/lat 43.181667)">A Nabeira</a>, 43°10′54ʺ N, 8°13′44ʺ W; 303 m a.s.l.; 7 Jan. 2025; A. Couceiro s.n.; bark of Pseudotsuga menziesii; ACN [ACN2025010700] • Asturias, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-5.2319446&amp;materialsCitation.latitude=43.31278" title="Search Plazi for locations around (long -5.2319446/lat 43.31278)">El Pico</a>; 43°18′46ʺ N, 5°13′55ʺ W; 440 m a.s.l.; 17 Aug. 2020; A. Jurado &amp; M. Villarreal s.n.; bark of Quercus pyrenaica; AH [AH57611] .</p><p>PORTUGAL • Azores, Sao Miguel, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-25.407223&amp;materialsCitation.latitude=37.754723" title="Search Plazi for locations around (long -25.407223/lat 37.754723)">Vila Franca do Campo</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-25.407223&amp;materialsCitation.latitude=37.754723" title="Search Plazi for locations around (long -25.407223/lat 37.754723)">Lagoa do Congro</a>; 37°45′17ʺ N, 25°24′26ʺ W; 460 m a.s.l.; 3 Feb. 2025; A. Couceiro, C. Sos &amp; M. Villarreal s.n.; bark of Ocotea foetens; AH [AH60366] .</p><p>Description</p><p>Basidiomata small and delicate. Pileus 1–3(–6) mm diam., initially hemispherical expanding to broadly campanulate or convex; margin obscurely translucent-striate, crenate, covered with minute granules including some scattered projecting stalked granules, thin-fleshed; surface dry, persistently granulose, entirely and densely covered by minute white granules in continuous irregular floccose piles, granules less often forming collapsing, conic, pyramidal or tapering and curved piles of white granules up to 0.2 mm; white, unchanging with age or attaining a pale grey tinge near center. Lamellae broadly adnate, decurrent with a small tooth, subdistant, 7–14 reaching the stipe, with 0–1 lamellulae, ventricose, white at first then cream, edge white, fringed, glistening, also with granules near to the pileal margin of young specimens. Stipe 5–35 × 0.3–1.0 mm, central, cylindrical, equal to slightly tapering towards apex, solid, base without basal disc, base usually with some sparse short white hairs appressed on the substrate; surface dry, with abundant finger-like, round-topped, erect, white cystidia up to 0.1 mm tall, each separated from each other, these easily removed and therefore may be sparse or absent in some specimens particularly when very wet, white but dull cream when granules and cystidia are sparse revealing the background of the stipe, drying white; base of stipe with a short sleeve (0.5–1 mm) of piles of granules similar to those on the pileus. Odour not distinctive. Taste mild.</p><p>Basidiospores (6.2‒)6.7‒8.6(‒9.5) × (5.6‒)5.9‒7(‒7.6) µm; Q = 1‒1.3(‒1.5); n = 50; Me = 7.5 × 6.5 µm; Qe = 1.2, globose or subglobose to broadly ellipsoid, smooth, hyaline, weakly amyloid, thin-walled, with a guttule. Basidia 19–31 × 5–11 μm, clavate to broadly clavate, 4-spored, sterigmata to 6 μm long., clamped at base, hyaline. Cheilocystidia forming a sterile band, abundant, crowded, 18–32 × 9–19 μm, slender or broadly clavate, obpyriform, sphaeropedunculate, vesiculose, with narrow stalk 2.5–5.5 × 20 μm, densely spinulose except smooth in lower part, hyaline, thin-walled, clamped at base; spinulae 0.8 μm × 0.3 μm, subconical. Pleurocystidia absent. Pileipellis a hymeniderm when very young then a cutis of thin-walled, sometimes spinulose, dextrinoid, clamped elements 6–16 μm broad, giving rise to prostrate and erect acanthocysts. Acanthocysts abundant, sometimes detached, 15–32 × 9–19 μm, globose, obpyriform, vesiculose, sphaeropedunculate, thin-walled, hyaline to pale greyish in KOH or water, dextrinoid, entirely densely spinulose, spinulae bluntly conic, obtuse, up to 1.5 μm × 1 μm at the base. Cherocytes single or catenulate in chains, variable in size and form: 9–32 × 9–19 μm, globose, obpyriform, vesiculose to irregular, thick-walled (up to 2.4 μm), with erect or curved thorn-like spines up to 17 μm × 6 μm present usually on only part of each element either densely so or scattered. Elements also are often spinulose at least in part with spinulae 1.5–3.5 μm × 1 μm. Others form a globose terminal 21–32 μm diameter arising from an erect, narrow (2–6 μm broad), smooth-walled, or ornamented stalk or chain of elements that project the terminal cell beyond the pileipellis. Hypodermium of thin-walled, smooth, dextrinoid hyphae, swollen up to 150 × 65 μm. Pileal trama a narrow layer of hyphae similar to hypodermium. Lamellar trama tightly packed, parallel, clamped hyphae 2.5–3.5 μm broad, strongly dextrinoid. Subhymenium hyphae similar to trama. Cortical and medullary hyphae of the stipe 3.5– 4.5 μm diam. near surface, wider in interior up to 15 μm diam., parallel, smooth, hyaline in KOH or water, dextrinoid, thin-walled. Caulocystidia 15–150 × 8–20 μm, variable in shape: short forms clavate or vesiculose, longer forms cylindrical, sphaeropedunculate or contorted, with narrow smooth or spinulose stalk 3.5–4.5 μm curving outwards from the parallel hyphae of the stipe, densely and evenly spinulose overall, hyaline, amyloid, thin-walled; spinulae 1.5 × 1 μm, conic to obtuse; abundant on majority of the stipe, some in loose fascicles. Clamp connections are present at all tissues.</p><p>Habitat and distribution</p><p>Growing solitary or gregarious on moss-covered bark of trees. Worldwide distributed.</p><p>Remarks</p><p>Mycena corynephora is a well-known species in Europe described by Maas Geesteranus (1983a) and worldwide distributed, characterized by growing on moss-covered bark of hardwoods. Distinctive features of M. corynephora are a white furfuraceous to farinose pileus up to 6 mm wide, adnate white lamellae, furfuraceous stipe lacking basal disc, large globose to subglobose spores, 4-spored basidia, presence of clamp connections and densely spinulose caulocystidia. While in the literature, the species is always described as devoid of cherocytes, we have found that some young collections have this kind of cells. Mycena judithiana Bougher, described by Bougher (2009) from Australia, is characterised by subglobose spores and thick-walled elements with large projections that are interpreted as cherocytes. These projections are identical to those found in the primordia of some of our M. corynephora collections. Initially, this led us to interpret some of these collections as M. judithiana . However, the absence of sequences in the databases prevents us from determining whether they are the same or different species.</p><p>Two other species of M. sect. Amparoina, M. yalensis (of which we have sequenced a collection), and M. globispora (Manim. &amp; Leelav.) Aravind. &amp; Manim., also possess globose or subglobose basidiospores. Nevertheless, M. yalensis differs from M. corynephora in having smaller basidiospores (6.4–6.8 × 5.1–6.8 µm), cystidia from the junction of the stipe base with the substrate with more densely arranged, shorter spines, and fructification on bark of Alnus . On the other side, M. globispora differs from M. corynephora in having predominantly bisporic basidia, cherocytes with broader excrescences towards the apex, and more narrow cylindrical caulocystidia with longest excrescences at the middle region. Unfortunately, it is not possible to compare the two species molecularly because no M. globispora sequences are available. Curiously, the European sequences of M. corynephora are clustered in a different clade from the Chinese sequences, so it seems to be a phylogenetically separated species that would need to be renamed. In addition, the Chinese collections labelled as M. alphitophora correspond well with M. corynephora .</p></div>	https://treatment.plazi.org/id/039387C1D573001AFDCBF9D0FE48FBF3	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Villarreal, Manuel;Couceiro, Antonio;Traba, José María;Cortés-Pérez, Alonso	Villarreal, Manuel, Couceiro, Antonio, Traba, José María, Cortés-Pérez, Alonso (2026): Reevaluating Mycena section Amparoina (Mycenaceae, Agaricales) in the northwestern Iberian Peninsula and Macaronesia, with descriptions of four new species and a new European record. European Journal of Taxonomy 1039: 1-41, DOI: 10.5852/ejt.2026.1039.3179, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3179/14131
039387C1D5770018FE2EFB10FE36FDD0.text	039387C1D5770018FE2EFB10FE36FDD0.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mycena eucalypticola Traba, Couceiro & M. Villarreal 2026	<div><p>Mycena eucalypticola Traba, Couceiro &amp; M.Villarreal sp. nov.</p><p>MycoBank: MB 841234</p><p>Figs 10–12, 19</p><p>Diagnosis</p><p>Mycena eucalypticola sp. nov. is distinguished from M. globispora, which has similar cherocytes, by its ellipsoid basidiospores and caulocystidia lacking long outgrowths in the middle.</p><p>Etymology</p><p>Referring to the substratum where the new species was first found.</p><p>Type material</p><p>Holotype SPAIN • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.170834&amp;materialsCitation.latitude=43.229446" title="Search Plazi for locations around (long -8.170834/lat 43.229446)">Oza-Cesuras</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.170834&amp;materialsCitation.latitude=43.229446" title="Search Plazi for locations around (long -8.170834/lat 43.229446)">Santiago de Reboredo</a>; 43°13′46ʺ N, 8°10′15ʺ W; 122 m a.s.l.; 16 May 2021; A. Couceiro s.n.; on dead leaves of Eucalyptus globulus; GenBank no.: MZ393494 (ITS, partial sequence, not used in the molecular analyses), OQ427382 (ITS); AH [AH56005].</p><p>Additional material examined</p><p>SPAIN • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.156667&amp;materialsCitation.latitude=43.31278" title="Search Plazi for locations around (long -8.156667/lat 43.31278)">Paderne</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.156667&amp;materialsCitation.latitude=43.31278" title="Search Plazi for locations around (long -8.156667/lat 43.31278)">San Salvador de Velouzás</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.156667&amp;materialsCitation.latitude=43.31278" title="Search Plazi for locations around (long -8.156667/lat 43.31278)">Condós</a>; 43°18′46ʺ N, 8°09′24ʺ W; 122 m a.s.l.; 15 Jan. 2022; A. Couceiro, J.M. Traba, A. Vila &amp; M. Villarreal s.n.; on dead leaves of Eucalyptus globulus; AH [AH56023] • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.846945&amp;materialsCitation.latitude=43.698612" title="Search Plazi for locations around (long -7.846945/lat 43.698612)">Ortigueira</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.846945&amp;materialsCitation.latitude=43.698612" title="Search Plazi for locations around (long -7.846945/lat 43.698612)">Playa de Morouzos</a>; 43°41′55ʺ N, 7°50′49ʺ W; 7 m a.s.l.; 8 Dec. 2022; A. Couceiro, A. Jurado, C. Sos &amp; M. Villarreal s.n.; on falling bark of Laurus nobilis; AH [AH57608] • Fragas do Eume, Pontedeume; 43°40′99ʺ N, 8°8′44ʺ W; 19 m a.s.l.; 3 Nov. 2024; A. Cortés-Pérez, A. Couceiro &amp; M. Villarreal s.n.; on dead leaves of Betula alba and Salix atrocinerea; AH [AH60331] • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.846667&amp;materialsCitation.latitude=43.698334" title="Search Plazi for locations around (long -7.846667/lat 43.698334)">Ortigueira</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.846667&amp;materialsCitation.latitude=43.698334" title="Search Plazi for locations around (long -7.846667/lat 43.698334)">Playa de Morouzos</a>; 43°41′54ʺ N, 7°50′48ʺ W; 7 m a.s.l.; 2 Mar. 2022; J. Traba &amp; A. Couceiro s.n.; on leaves of Salix atrocinerea; GenBank no.: OQ427383; PR [PR4020422783] .</p><p>PORTUGAL • Madeira, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-17.1175&amp;materialsCitation.latitude=32.804443" title="Search Plazi for locations around (long -17.1175/lat 32.804443)">Ribeira do Seixal</a>; 32°48′16ʺ N, 17°07′03ʺ W; 570 m a.s.l.; 13 Feb. 2024; A. Couceiro, C. Sos &amp; M. Villarreal s.n.; dead leaves of Laurus novocanariensis; AH [AH60107] • Madeira, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-16.953611&amp;materialsCitation.latitude=32.823334" title="Search Plazi for locations around (long -16.953611/lat 32.823334)">Arco de São Jorge</a>; 32°49′24ʺ N, 16°57′13ʺ W; 240 m a.s.l.; 14 Feb. 2024; A. Couceiro, C. Sos &amp; M. Villarreal s.n.; dead leaves of Laurus novocanariensis; GenBank no.: PP865076; AH [AH60108] .</p><p>Description</p><p>Primordia 0.15–0.7 mm diam., hemispherical to paraboloid, covered with white granules, initially forming a closed layer, soon breaking up to a non-contiguous layer upon a white surface. Pileus 1–2 mm diam., initially conical or parabolic, expanding to hemispherical or convex to plano-convex with age; margin straight or slightly crenate, translucent-striated; surface delicately pruinose to granular throughout, almost furrowed, pure white. Context white, inconspicuous. Lamellae free, adnate or closely adnate, ascending, distant to subdistant, 5‒8 reaching the stipe, with 0‒1 lamellulae, up to 0.3 mm wide, white, with rectilinear or slightly convex edges, pruinose under lens and concolorous. Stipe 1–17 × 0.15– 0.25 mm, central, filiform or very slightly enlarged towards the base, hollow; surface entirely covered by erect white hairs, insititious, white, watery white to almost translucent. Indistinct odour and taste.</p><p>Basidiospores (5.6‒)6.4‒8.3(‒9.8) × (3.6‒)3.9‒5(‒5.6) µm; Q = (1.4‒)1.5‒1.8(‒2); n = 100; Me = 7.3 × 4.4 µm; Qe = 1.7, elongate to cylindric, smooth, hyaline, amyloid, thin-walled, indistinctly guttulate. Basidia 9–17.5 × 7–9 μm, obovoid to broadly clavate, 2- or 4-spored, sterigmata up to 5 μm long., not clamped at the base. Cheilocystidia 15.5‒22.6(‒35.9) × 9.2‒14.8 μm, ellipsoid, obovoid, clavate to fusoid or subcylindrical, covered densely with outgrowths, hyaline, thin-walled; outgrowths 0.5–1.6(‒3) × 0.5–1 μm, cylindrical, mixed with the basidia. Pleurocystidia absent. Pileipellis a cutis covered by a universal veil composed of acanthocysts and cherocytes; hyphae 2–17 μm diam., smooth or covered by short outgrowths 0.5–2.5 × 0.5–1 μm, hyaline, with terminal acanthocysts 8.5–36(‒47.5) × 8–25 μm, claviform or broadly claviform to subglobose or ovoid, covered densely with outgrowths, hyaline, thin-walled; outgrowths 0.5–2.5(‒4.5) × 0.5–1 μm, cylindrical, apex obtuse. Acanthocysts abundant, sometimes detached, 15–32 × 9–19 μm, globose, obpyriform, vesiculose, sphaeropedunculate, entirely densely spinulose, hyaline to pale greyish in KOH or water, dextrinoid, thin-walled; spinulae up to 1.5 μm × 1 μm at base, bluntly conic, obtuse. Cherocytes 12.5–21.5 × 9–16 μm, ellipsoid, broadly clavate to obovoid, hyaline, thick-walled (up to 3 μm), covered with outgrowths, 0.5–4 × 0.5–3 μm, solid or thick-walled, crystalline-like rounded. Hypodermium, hyphae 3–25 μm diam., hyaline, dextrinoid. Lamellar trama regular to subregular; hyphae 2–21 μm diam., hyaline, dextrinoid. Cortical and medullary hyphae of the stipe 1–7.5 μm diam., with terminal or lateral caulocystidia. Caulocystidia 45–168 × 4–9(‒11.5) μm, short to broadly clavate or subcylindrical to long and cylindrical, usually with subcapitate at apex, densely spinulose; hyaline, thin-walled; spinulae 0.5–5 × 0.5–1.25 μm, cylindrical or subconical. Clamp connections are present but hard to find.</p><p>Habitat and distribution</p><p>Growing gregarious on dead leaves of Betula, Eucalyptus, Laurus, and Salix . Known from Spain and Portugal (Fig. 19).</p><p>Remarks</p><p>M. eucalypticola sp. nov. is a predominantly foliicolous species that has been found fruiting on dead leaves of Betula alba, Eucalyptus globulus, Salix atrocinerea, and Laurus novocanariensis in four different localities of Galicia and Madeira. Only one collection has been found fruiting on decaying bark of Laurus . Macroscopically, it could be mistaken for a small species of Hemimycena Singer because of its absence of a basal disc and the diminutive white basidiomata featuring scant lamellae. However, it possesses amyloid spores and microcharacters that are very different from those of Hemimycena s. lat. Microscopically, it is characterised by its singular cherocytes provided with large globose crystalline-like excrescences and ornamented caulocystidia frequently subcapitated. Only M. globispora (= M. alphitophora var. globispora Manim. &amp; Leelavathy) described from India (Aravindakshan &amp; Manimohan 2015) shows a universal veil composed of similar cherocytes that are thick-walled and with broader excrescences towards the apex, and that are present both over the pileus and at the stipe base. However, this species differs from M. eucalypticola in having globose to subglobose basidiospores, and longer cylindrical caulocystidia with longest excrescences at the middle region. Unfortunately, there is no sequence for M. globispora to determine its phylogenetic proximity to M. eucalypticola .</p><p>M. eucalypticola sp. nov. should not be confused with M. eucalipticola Losa, which is a nomen nudum (Maas Geesteranus 1983b).</p></div>	https://treatment.plazi.org/id/039387C1D5770018FE2EFB10FE36FDD0	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Villarreal, Manuel;Couceiro, Antonio;Traba, José María;Cortés-Pérez, Alonso	Villarreal, Manuel, Couceiro, Antonio, Traba, José María, Cortés-Pérez, Alonso (2026): Reevaluating Mycena section Amparoina (Mycenaceae, Agaricales) in the northwestern Iberian Peninsula and Macaronesia, with descriptions of four new species and a new European record. European Journal of Taxonomy 1039: 1-41, DOI: 10.5852/ejt.2026.1039.3179, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3179/14131
039387C1D57A0013FE2BFE8AFD7BFAC7.text	039387C1D57A0013FE2BFE8AFD7BFAC7.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mycena melanovelis Traba, Couceiro & M. Villarreal 2026	<div><p>Mycena melanovelis Traba, Couceiro &amp; M.Villarreal, sp. nov.</p><p>MycoBank: MB 841233</p><p>Figs 13–15, 19</p><p>Diagnosis</p><p>Mycena melanovelis sp. nov. differs from the very similar M. lasiopus Maas Geest. &amp; de Meijer in having a smaller size, a white pileus, a small basal disc at the base of the stipe, more conspicuously lobed cherocytes, completely spinulose caulocystidia, and absence of clamps.</p><p>Etymology</p><p>From the ancient Greek ‘μέλας’ (mélas: black), (genitive μέλανος mélanos) and from the Latin ‘velum’: covering, awning, curtain, sail, veil.</p><p>Type material</p><p>Holotype SPAIN • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.170834&amp;materialsCitation.latitude=43.229446" title="Search Plazi for locations around (long -8.170834/lat 43.229446)">San Benito de Mayal</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.170834&amp;materialsCitation.latitude=43.229446" title="Search Plazi for locations around (long -8.170834/lat 43.229446)">Oza-Cesuras</a>; 43°13′46ʺ N, 8°10′15ʺ W; 122 m a.s.l.; 16 May 2021; A. Couceiro s.n.; on dead leaves of Acacia melanoxylon; GenBank no.: MZ393493 (ITS); AH [AH56004].</p><p>Additional material examined</p><p>SPAIN • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.170834&amp;materialsCitation.latitude=43.229446" title="Search Plazi for locations around (long -8.170834/lat 43.229446)">San Benito de Mayal</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-8.170834&amp;materialsCitation.latitude=43.229446" title="Search Plazi for locations around (long -8.170834/lat 43.229446)">Oza-Cesuras</a>; 43°13′46ʺ N, 8°10′15ʺ W; 122 m a.s.l.; 6 Dec. 2021; A. Couceiro, M. Saavedra &amp; M. Villarreal s.n.; on dead leaves of Acacia melanoxylon; AH [AH56026] • same locality as for preceding; 1 May 2021; A. Couceiro s.n.; AH [AH56027] • same locality as for preceding; 17 Apr. 2022; A. Couceiro s.n.; GenBank no.: OQ427381 (ITS); ACN [ACN202241700] .</p><p>PORTUGAL • Azores, Sao Miguel, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-25.49639&amp;materialsCitation.latitude=37.795" title="Search Plazi for locations around (long -25.49639/lat 37.795)">Ribeira Grande</a>; 37°47′42ʺ N, 25°29′47ʺ W; 220 m a.s.l.; 5 Feb. 2025; A. Couceiro, C. Sos &amp; M. Villarreal s.n.; on dead leaves of Acacia melanoxylon; AH [AH60367] • Azores, Sao Miguel, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-25.613335&amp;materialsCitation.latitude=37.74917" title="Search Plazi for locations around (long -25.613335/lat 37.74917)">Ponta Delgada</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-25.613335&amp;materialsCitation.latitude=37.74917" title="Search Plazi for locations around (long -25.613335/lat 37.74917)">Canada da Areia</a>; 37°44′57ʺ N, 25°36′48ʺ W; 11 m a.s.l.; 6 Feb. 2025; A. Couceiro, C. Sos &amp; M. Villarreal s.n.; on dead leaves of Acacia melanoxylon; AH [AH60368] .</p><p>Description</p><p>Primordia up to 0.7 mm diam., initially hemispherical to paraboloid, sessile, shining, covered with dark brown to blackish-brown granules, initially forming a closed layer, soon breaking up to a non-contiguous layer upon a whitish surface. Pileus up to 9 mm diam., at first campanulate, expanding to convex to plano-convex, flattening with age; margin striatulate to sulcate along the denticulate, translucent-striate, more pronouncedly sulcate when dried; surface dry, minutely granular, entirely white, retaining dark brown to blackish-brown granules of the veil at the disc. Context very thin and white. Lamellae, ascending-adnate, subdistant, 7‒9 reaching the stipe, with 1 series of lamellulae, 0.3‒0.5 mm broad, white, with convex to subhorizontal and concolorous lamellar edge, tender. Stipe 5‒12 mm (up to 20 mm in culture) × 0.15‒0.34 mm, filiform, central, equal, terete, bulbous at the base, hollow, fragile; surface dry, puberulous all over, watery white, arising from a small (up to 1 mm across), sulcate, floccose, white basal disc not always easily seen and sometimes apparently absent. Taste not recorded. Odour absent.</p><p>Basidiospores (6.6‒)7.2‒8.9(‒9.8) × (2.9‒)3.2‒3.9(‒4.5) µm; Q = (1.8‒)2‒2.5(‒2.8); n = 100; Me = 8 × 3.6 µm; Qe = 2.3, elongated to cylindric, smooth, hyaline, weakly amyloid, thin-walled, with refractive guttules. Basidia 10.71‒12.67 × 7.89‒9.46 µm, broadly clavate to obpyriform, 4-spored, with sterigmata up to 6.25 µm long., hyaline. Cheilocystidia forming a sterile band, 9.50‒14.78 × 5.50‒8.30 µm, clavate, subclavate to subcylindrical, hyaline, inamyloid, clampless, densely ornamented with warts 0.45‒1.5 × 0.4‒1.2 µm. Pleurocystidia absent. Pileipellis a cutis with terminal acanthocysts and cherocytes conforming a subhymenoderm layer; repent hyphae 0.8‒4.0 µm diam, cylindrical, smooth, hyaline, sometimes with brownish contents, dextrinoid, thin-walled, non-gelatinous. Acanthocysts 14.70‒22.5 × 9.17‒15.83 µm, subglobose, densely spinulose, hyaline to dark pigmented, inamyloid, thin-walled; spinulae 0.8‒1.6 × &lt;0.8 µm. Cherocytes more or less frequent, detersive, 11.84‒23.38 × 10.5‒19.66 µm, predominantly globose, irregular in shape to heart-shaped, with (0–)2–6(–7) obtuse or obtusely conical lobes, with homogeneous dark brown contents, inamyloid, slightly thick-walled (up to 1.5 µm); densely warted, warts 0.8‒1.6 × &lt;0.8 µm. Hypodermium composed of parallel hyphae up to 19 µm diam. Lamellar trama regular; hyphae 2‒19 µm diam., hyaline, dextrinoid, thin-walled, non-gelatinous. Stipitipellis a cutis; cortical hyphae 1.5–4.6 µm diam., parallel, cylindrical, hyaline, dextrinoid, thin-walled; medullary hyphae 5‒18 µm diam., smooth, hyaline, dextrinoid, thin-walled. Caulocystidia abundant, 23‒230 × 5.6‒10.4 µm, cylindrical to clavate, obtuse, densely spinulose overall, hyaline, inamyloid, thin-walled; spinulae 0.8‒2.4 × &lt;0.8 µm, cylindrical or subconic, obtuse. Clamp connections are absent in all tissues.</p><p>Habitat and distribution</p><p>Growing scattered to gregarious on dead leaves of Acacia melanoxylon . Known from Galicia (Spain) and Sao Miguel (Azores, Portugal), but probably introduced with its host Acacia melanoxylon from Australia (Fig. 19).</p><p>Remarks</p><p>Mycena melanovelis sp. nov. is another foliicolous species that fruits exclusively on dead leaves of Acacia melanoxylon . Macroscopically it is characterized by its delicate basidiocarps with white pileus covered with brownish granules and an entirely puberulous stipe arising from a small basal disc. Within the M. sect. Amparoina, species with coloured acanthocysts and cherocytes, the only species so far known with such dark brown pigmentation is M. lasiopus, originally described from Paraná (Maas Geesteranus &amp; de Meijer 1998) and Sao Tomé (Cooper et al. 2018). The Afro-American species differs in that it has a slightly darker pileus, broader spores, numerous cheilocystidia, and irregularly shaped cherocytes without acute projections. The caulocystidia are almost smooth at the apex, and clamps are present in all tissues.</p><p>The fourth stirps Fuscinea suggested by Maas Geesteranus &amp; de Meijer (1998) in their second work about Mycena from the state of Paraná, includes two Brazilian species: M. fuscinea Maas Geest. &amp; de Meijer and M. fuliginea Maas Geest. &amp; de Meijer. Both lack cherocytes, while being present in M. melanovelis sp. nov. Certainly, the fact that cherocytes tend to have an ephemeral nature as they are detersile structures could mean that the Brazilian species had these cells and they would not have been observed at the time of their description forcing us to compare our new species with them. Mycena lasiopus differs from M. melanovelis in having slightly darker pileus, broader spores, numerous cheilocystidia and less lobed cherocytes without acute projections, and the caulocystidia are almost smooth at the apex and clamps are present in all tissues. Mycena fuscinea differs in having a greyish brown pileus, bisporic basidia, and larger basidiospores (8.1‒9.8 × 5.4‒6.5 µm (Q = 1.6), whereas M. fuliginea is a corticolous-lignicolous species lacking a basal disc and having wider spores (8.7‒10.3 × 4.7‒5.4 µm; Q = 2.0) than M. melanovelis .</p></div>	https://treatment.plazi.org/id/039387C1D57A0013FE2BFE8AFD7BFAC7	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Villarreal, Manuel;Couceiro, Antonio;Traba, José María;Cortés-Pérez, Alonso	Villarreal, Manuel, Couceiro, Antonio, Traba, José María, Cortés-Pérez, Alonso (2026): Reevaluating Mycena section Amparoina (Mycenaceae, Agaricales) in the northwestern Iberian Peninsula and Macaronesia, with descriptions of four new species and a new European record. European Journal of Taxonomy 1039: 1-41, DOI: 10.5852/ejt.2026.1039.3179, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3179/14131
039387C1D57E002CFE5BFA0BFDD7FE4B.text	039387C1D57E002CFE5BFA0BFDD7FE4B.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mycena viridivelata M. Villarreal & Couceiro 2026	<div><p>Mycena viridivelata M.Villarreal &amp; Couceiro sp. nov.</p><p>MycoBank: MB 857444</p><p>Figs 16–19</p><p>Diagnosis</p><p>Mycena viridivelata sp. nov. differs from M. amoena in having dark green granules over the pileus, less conspicuously lobed cherocytes, slightly narrower spores and different habitat.</p><p>Etymology</p><p>The epithet derives from the Latin ‘viridis’,-e = green, and velata from the Latin ‘velum’ = veil, referring to the colour of the granules in the pileus surface.</p><p>Type material</p><p>Holotype SPAIN • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.846528&amp;materialsCitation.latitude=43.69775" title="Search Plazi for locations around (long -7.846528/lat 43.69775)">Santa Marta de Ortigueira</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.846528&amp;materialsCitation.latitude=43.69775" title="Search Plazi for locations around (long -7.846528/lat 43.69775)">Playa de Morouzos</a>; 43°41′51.9ʺ N, 7°50′47.5ʺ W; 9 m a.s.l.; 9 Dec. 2023; A. Couceiro, J. Mateos, C. Sos &amp; M. Villarreal s.n.; bark of Laurus nobilis; GenBank no.: PV037614 (ITS); AH [AH59694].</p><p>Additional material examined</p><p>SPAIN • A Coruña, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.846528&amp;materialsCitation.latitude=43.69775" title="Search Plazi for locations around (long -7.846528/lat 43.69775)">Santa Marta de Ortigueira</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-7.846528&amp;materialsCitation.latitude=43.69775" title="Search Plazi for locations around (long -7.846528/lat 43.69775)">Playa de Morouzos</a>; 43°41′51.9ʺ N, 7°50′47.5ʺ W; 9 m a.s.l.; 15 Apr. 2022; M. Villarreal s.n.; with Salix atrocinerea dead leaves; wetted 18 Apr. 2022, harvested from batch moist chambers on 2 May 2022; GenBank no.: PV037612 (ITS); AH [AH59669] • same locality as for preceding; harvested from batch moist chambers on 8 May 2022; AH [AH59671] • same locality as for preceding; 17 Dec. 2023; A. Couceiro s.n.; bark of Laurus nobilis; ACN [ACN2023120700] • same locality as for preceding; harvested from batch moist chambers on 3 May 2022; GenBank no.: PV037613 (ITS); AH [AH59670] .</p><p>Description</p><p>Primordia hemispherical to paraboloid, covered with dark green granules, initially forming a closed layer, soon breaking up to a non-contiguous layer upon a light grey surface, more whitish at the pileus margin; dried dark greyish green. Pileus 1.5‒2.2 mm diam., initially paraboloid, expanding to obtusely conic or broadly convex in age; margin crenulate, translucent-striate, old very thin-fleshed, translucent; surface in young covered all over with groups of metallic green to dark green (sometimes nearly blackish green) ‘sugar-like’ granules on a whitish surface, mature white, still bearing small amounts of granules especially in the disc. Lamellae narrowly adnate, subventricose to ventricose, 8‒12 reaching the stipe, with lamellulae of variable length, white. Stipe 8–22 × ‒ 1.2 mm, central, filiform, at the base slightly inflated; surface hirsute all over, watery grey to watery white; arising from a small spinulose basal disc. Odour and taste absent.</p><p>Basidiospores (7.8‒)8.2‒9.5(‒10.1) × (3‒)3.3‒4(‒4.3) µm; Q = (2‒)2.2‒2.7(‒3); n = 100; Me = 8.8 × 3.6 µm; Qe = 2.4, cylindric to bacilliform, smooth, hyaline, amyloid, thin-walled. Basidia 11‒14.5 × 4.3‒6.8 μm, obpyriform to clavate, 2 or 4-spored, sterigmata 2–4 μm long., hyaline. Cheilocystidia 10–25 × 6–13 μm, clavate to broadly clavate, sparsely spinulose in the upper part but more densely spinulose near the pileus margin, not forming a sterile band; spinulae 0.5–1 × 0.5 μm, cylindrical to subconical. Pleurocystidia absent. Pileipellis a cutis with acanthocysts and detersile cherocytes; hyphae 2–13 μm diam., warty or smooth, dextrinoid. Acanthocysts 9‒19 × 9.5–18.03 μm, globose to subglobose, densely warty, dark brownish green, dark green or hyaline, inamyloid, thin-walled; arising from a septated thin-walled, smooth or poorly warty hyphae of about 3 μm diam.; spinulae 0.5–1 × 0.5–1.5 μm, cylindric or subconical. Marginal acanthocysts 13‒27.6 × 6.6‒11.4 μm, clavate, broadly clavate, ovoid or subglobose, densely spinulose, grey or hyaline, inamyloid, thin-walled; spinulae 0.5–1 × 0.5–1.5 μm, cylindric or subconical. Cherocytes 14–21 × 14–20 µm (bypassing lobes), roundish to obtuse angular, with 2–6 obtuse or obtusely conical lobes, lobes extending up to 6 μm, with a dark green vacuolar content, walls jade green or hyaline, thick-walled up to 4.5 μm; covered with short spinulae and warts; warts hemispherical, 0.4–2 × 0.4–2.5 μm; often seen originating from a septate slightly thick-walled, smooth hypha of about 1.5–3 μm diam. Hypodermium composed of inflated hyphae 11–26 μm diam., dextrinoid. Lamellar trama composed of inflated hyphae up to 25 μm diam., dextrinoid. Cortical and medullary hyphae of the stipe 6–26 μm diam., parallel, smooth, dextrinoid. Caulocystidia abundant throughout the stipe, 13–98 × 5–14 µm, ranging from short and broadly clavate or subcylindric to long and cylindric, sometimes constricted or bifurcated apex even or somewhat wider, obtuse, densely and evenly spinulose overall, hyaline, thin-walled, inamyloid; spinulae 0.5–1(–2) × 0.5–1 μm, cylindrical or subconical. Clamps not observed.</p><p>Habitat and distribution</p><p>Scattered or gregarious on dead leaves and bark of Laurus nobilis and Salix atrocinerea from April to the end of December. Known only from the type locality in Spain (Fig. 19).</p><p>Remarks</p><p>Mycena viridivelata sp. nov. has many macro- and microscopic similarities with the recently described M. amoena (Jagers et al. 2023), from which it differs in having cherocytes with much thicker and more refringent cell walls and darker intracellular pigment, which together give a dark green colour to the veil and somewhat more elongated basidiospores Qe = 2.4 in M. viridivelata (vs Qe = 1.81–1.91 in M. amoena). Besides, while M. amoena has been found fruiting on nuts and husks of Corylus avellana, M. viridivelata has been found on leaves and bark of Laurus nobilis and dead leaves of Salix atrocinerea . Molecularly, their ITS sequences are quite divergent, differing by at least 45 substitution and indel positions (93.84% similarity).</p></div>	https://treatment.plazi.org/id/039387C1D57E002CFE5BFA0BFDD7FE4B	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Villarreal, Manuel;Couceiro, Antonio;Traba, José María;Cortés-Pérez, Alonso	Villarreal, Manuel, Couceiro, Antonio, Traba, José María, Cortés-Pérez, Alonso (2026): Reevaluating Mycena section Amparoina (Mycenaceae, Agaricales) in the northwestern Iberian Peninsula and Macaronesia, with descriptions of four new species and a new European record. European Journal of Taxonomy 1039: 1-41, DOI: 10.5852/ejt.2026.1039.3179, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3179/14131
