Dermoloma angustisporum Jancovic. & Karich 2025, sp. nov.
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| author | Adamčíková, Katarína Kiran, Munazza Caboň, Miroslav Matheny, Brandon P. Sánchez-García, Marisol Arnolds, Eef Caboňová, Michaela Corriol, Gilles Dima, Bálint Friebes, Gernot Griffith, Gareth W. Grootmyers, Django Harries, David Karich, Alexander Mešić, Armin Mihaljevič, Martin Moreau, Pierre-Arthur Pošta, Ana Shapkin, Vasilii Tkalčec, Zdenko Vizzini, Alfredo Vondrovicová, Lenka Adamčík, Slavomir Jančovičová, Soňa |
| author_facet | Adamčíková, Katarína Kiran, Munazza Caboň, Miroslav Matheny, Brandon P. Sánchez-García, Marisol Arnolds, Eef Caboňová, Michaela Corriol, Gilles Dima, Bálint Friebes, Gernot Griffith, Gareth W. Grootmyers, Django Harries, David Karich, Alexander Mešić, Armin Mihaljevič, Martin Moreau, Pierre-Arthur Pošta, Ana Shapkin, Vasilii Tkalčec, Zdenko Vizzini, Alfredo Vondrovicová, Lenka Adamčík, Slavomir Jančovičová, Soňa |
| contents | <p><i>Dermoloma angustisporum</i> Jančovič. & Karich, sp. nov.</p><p>Figs 10 a, 11</p><p><b>Holotype.</b></p><p>Sweden • Medelpad, Börgsjö, Talja Gården, terrestrial on semi-natural, mown meadow, 27 Aug 2018, J. M. Traba-Velay (SAV F-20343).</p><p><b>Etymology.</b></p><p>With narrow spores compared to other <i>Dermoloma</i> species.</p><p><b>Diagnosis.</b></p><p>European species; basidiomata small and slender; lamellae pale yellowish white to brownish gray; spores amyloid and narrow, Q> 1.7.</p><p><i>Pileus</i> (7 –) 9–20 mm; convex, soon expanding to plane, sometimes indistinctly umbonate; margin indistinctly translucently striate when wet, when dry radially cracked; surface smooth, pruinose, hygrophanous; color near margin dark brown (6 F 4), brown (6 E 4) to light brown (5 D 4), when dry grayish brown (5 D 3), brownish ochraceous (5 C 3) to ochraeous-gray (5 C 2, 6 C 2), near center dark brown (6 F 4, 7 F 4) to brown (6 E 4), when dry light brown (5 E 4,5E 5), grayish brown (5 E 3) to light brown (5 D 4). <i>Stipe</i> 21–32 (– 37) × 1–1.5 mm; cylindrical, sometimes narrowed towards the base, flexuous; surface finely longitudinally striate, pruinose near lamellae, finely fibrillose towards the base; color near lamellae brownish gray (5 C 3, 5 D 3), near the base grayish brown (6 E 3), brown (6 E 4) to dark brown (6 F 3). <i>Lamellae</i> L = 21–28, l = 0–3; 1.5–3 mm wide; adnate-emarginate and decurrent with tooth; color yellowish white (4 A 2), ochraeous-gray (5 B 2) to brownish gray (5 C 2); edges entire or slightly irregular, rarely serrulate. <i>Context</i> fragile; odor weakly farinaceous.</p><p><i>Spores</i> (5.1 –) 5.4–5.8 – 6.2 (– 6.8) × (2.9 –) 3.2–3.4 – 3.6 (– 3.9) μm; narrowly ellipsoid, oblong or narrowly amygdaloid, Q = (1.49 –) 1.60–1.70 – 1.80 (– 1.91); walls amyloid; hilar appendage 0.5–1 μm long. <i>Basidia</i> (22 –) 25–28.1 – 31 (– 34) × (5 –) 5.5–6.2 – 6.5 (– 7.5) μm; clavate; with 4 sterigmata. <i>Basidioles</i> first cylindrical, then clavate, ca. 3–6 μm wide. <i>Marginal cells</i> (10 –) 12.5–20.4 – 28 (– 40) × (3 –) 4–5.1 – 6.5 (– 7.5) μm; cylindrical or clavate, apically mainly obtuse or occasionally constricted, flexuous, occasionally nodulose lobate. <i>Pileipellis</i> 55–70 μm deep; suprapellis 35–45 μm deep, usually of one, rarely two layers of inflated, densely arranged, with some irregularly protruded terminal cells at surface; subpellis well differentiated, 20–30 μm deep, of densely packed, mainly horizontally oriented, 3–15 μm wide hyphae, gradually passing to horizontally oriented and intricate hyphae in trama; hyphal terminations with brownish parietal pigments, in subpellis darker yellow-brown pigments, walls of terminal cells thickened up to 1 μm, in subpellis up to 1.5 μm. Terminal cells near pileus margin (18 –) 28–34.9 – 42 (– 50) × (10 –) 13–15.7 – 18.5 (– 22) μm; usually obpyriform, clavate, occasionally hourglass-shaped or subcylindrical, occasionally lobate near septa; subterminal cells mainly branched, fusiform or clavate, rarely cylindrical, often lobate, with lateral swellings or projections. Terminal cells near pileus center (18 –) 26.5–35.8 – 45 (– 65) × (5 –) 10–15.1 – 20.5 (– 30) μm; clavate or obpyriform, less frequently lobate; subterminal cells narrower or equally wide, cylindrical, clavate or fusiform, occasionally branched, flexuous, occasionally with lateral swellings or nodulose. <i>Caulocystidia</i> (21 –) 34.5–53.5 – 72.5 (– 93) × (3 –) 3.5–5.1 – 6.5 (– 14) μm; clavate or subcylindrical, usually flexuous or twisted, often nodulose or lobate, repent and in small or larger clusters, often intermingled; usually with slightly thickened walls up to 0.5 μm, with yellowish parietal pigments. <i>Clamp connections</i> present.</p><p><b>Distribution and ecology.</b></p><p>Known from two localities; one in Germany and the type locality in Sweden (two collections); in semi-natural grassland, perhaps preferring neutral to alkaline, loamy soil, but insufficiently known.</p><p><b>Additional material studied.</b></p><p>Germany • Zittau, Kaiserfelder, coord. 50°52'26"N, 14°47'35"E, 16 Oct 2019, extensive sheep-grazed pasture, with loamy soil, A. Karich and R. Ullrich <i>IHI- 19 Der 01</i> (GLM-F 137761, as <i>D. josserandii var. phaeopodium</i>). Sweden • Medelpad, Börgsjö, Talja Gården, terrestrial on meadow, 27 Aug 2018, S. Adamčík (SAV F-20342).</p><p><b>Notes.</b></p><p><i>Dermoloma angustisporum</i> is a member of <i>D. subgenus Amylospora</i>, section <i>Atrobrunnea</i>. The narrow spores (Q = 1.6–1.8) make it morphologically distinct from other species with similar small mycenoid basidiomata. In the phylogeny it forms a distinct clade with <i>D. applanatum</i> (Fig. 2), a species with similar spores but with much larger collybioid basidiomata (see below).</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_15857854 |
| institution | Zenodo |
| language | |
| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Dermoloma angustisporum Jancovic. & Karich 2025, sp. nov. Adamčíková, Katarína Kiran, Munazza Caboň, Miroslav Matheny, Brandon P. Sánchez-García, Marisol Arnolds, Eef Caboňová, Michaela Corriol, Gilles Dima, Bálint Friebes, Gernot Griffith, Gareth W. Grootmyers, Django Harries, David Karich, Alexander Mešić, Armin Mihaljevič, Martin Moreau, Pierre-Arthur Pošta, Ana Shapkin, Vasilii Tkalčec, Zdenko Vizzini, Alfredo Vondrovicová, Lenka Adamčík, Slavomir Jančovičová, Soňa Biodiversity Taxonomy Fungi Basidiomycota Agaricomycetes Agaricales Tricholomataceae Dermoloma Dermoloma angustisporum <p><i>Dermoloma angustisporum</i> Jančovič. & Karich, sp. nov.</p><p>Figs 10 a, 11</p><p><b>Holotype.</b></p><p>Sweden • Medelpad, Börgsjö, Talja Gården, terrestrial on semi-natural, mown meadow, 27 Aug 2018, J. M. Traba-Velay (SAV F-20343).</p><p><b>Etymology.</b></p><p>With narrow spores compared to other <i>Dermoloma</i> species.</p><p><b>Diagnosis.</b></p><p>European species; basidiomata small and slender; lamellae pale yellowish white to brownish gray; spores amyloid and narrow, Q> 1.7.</p><p><i>Pileus</i> (7 –) 9–20 mm; convex, soon expanding to plane, sometimes indistinctly umbonate; margin indistinctly translucently striate when wet, when dry radially cracked; surface smooth, pruinose, hygrophanous; color near margin dark brown (6 F 4), brown (6 E 4) to light brown (5 D 4), when dry grayish brown (5 D 3), brownish ochraceous (5 C 3) to ochraeous-gray (5 C 2, 6 C 2), near center dark brown (6 F 4, 7 F 4) to brown (6 E 4), when dry light brown (5 E 4,5E 5), grayish brown (5 E 3) to light brown (5 D 4). <i>Stipe</i> 21–32 (– 37) × 1–1.5 mm; cylindrical, sometimes narrowed towards the base, flexuous; surface finely longitudinally striate, pruinose near lamellae, finely fibrillose towards the base; color near lamellae brownish gray (5 C 3, 5 D 3), near the base grayish brown (6 E 3), brown (6 E 4) to dark brown (6 F 3). <i>Lamellae</i> L = 21–28, l = 0–3; 1.5–3 mm wide; adnate-emarginate and decurrent with tooth; color yellowish white (4 A 2), ochraeous-gray (5 B 2) to brownish gray (5 C 2); edges entire or slightly irregular, rarely serrulate. <i>Context</i> fragile; odor weakly farinaceous.</p><p><i>Spores</i> (5.1 –) 5.4–5.8 – 6.2 (– 6.8) × (2.9 –) 3.2–3.4 – 3.6 (– 3.9) μm; narrowly ellipsoid, oblong or narrowly amygdaloid, Q = (1.49 –) 1.60–1.70 – 1.80 (– 1.91); walls amyloid; hilar appendage 0.5–1 μm long. <i>Basidia</i> (22 –) 25–28.1 – 31 (– 34) × (5 –) 5.5–6.2 – 6.5 (– 7.5) μm; clavate; with 4 sterigmata. <i>Basidioles</i> first cylindrical, then clavate, ca. 3–6 μm wide. <i>Marginal cells</i> (10 –) 12.5–20.4 – 28 (– 40) × (3 –) 4–5.1 – 6.5 (– 7.5) μm; cylindrical or clavate, apically mainly obtuse or occasionally constricted, flexuous, occasionally nodulose lobate. <i>Pileipellis</i> 55–70 μm deep; suprapellis 35–45 μm deep, usually of one, rarely two layers of inflated, densely arranged, with some irregularly protruded terminal cells at surface; subpellis well differentiated, 20–30 μm deep, of densely packed, mainly horizontally oriented, 3–15 μm wide hyphae, gradually passing to horizontally oriented and intricate hyphae in trama; hyphal terminations with brownish parietal pigments, in subpellis darker yellow-brown pigments, walls of terminal cells thickened up to 1 μm, in subpellis up to 1.5 μm. Terminal cells near pileus margin (18 –) 28–34.9 – 42 (– 50) × (10 –) 13–15.7 – 18.5 (– 22) μm; usually obpyriform, clavate, occasionally hourglass-shaped or subcylindrical, occasionally lobate near septa; subterminal cells mainly branched, fusiform or clavate, rarely cylindrical, often lobate, with lateral swellings or projections. Terminal cells near pileus center (18 –) 26.5–35.8 – 45 (– 65) × (5 –) 10–15.1 – 20.5 (– 30) μm; clavate or obpyriform, less frequently lobate; subterminal cells narrower or equally wide, cylindrical, clavate or fusiform, occasionally branched, flexuous, occasionally with lateral swellings or nodulose. <i>Caulocystidia</i> (21 –) 34.5–53.5 – 72.5 (– 93) × (3 –) 3.5–5.1 – 6.5 (– 14) μm; clavate or subcylindrical, usually flexuous or twisted, often nodulose or lobate, repent and in small or larger clusters, often intermingled; usually with slightly thickened walls up to 0.5 μm, with yellowish parietal pigments. <i>Clamp connections</i> present.</p><p><b>Distribution and ecology.</b></p><p>Known from two localities; one in Germany and the type locality in Sweden (two collections); in semi-natural grassland, perhaps preferring neutral to alkaline, loamy soil, but insufficiently known.</p><p><b>Additional material studied.</b></p><p>Germany • Zittau, Kaiserfelder, coord. 50°52'26"N, 14°47'35"E, 16 Oct 2019, extensive sheep-grazed pasture, with loamy soil, A. Karich and R. Ullrich <i>IHI- 19 Der 01</i> (GLM-F 137761, as <i>D. josserandii var. phaeopodium</i>). Sweden • Medelpad, Börgsjö, Talja Gården, terrestrial on meadow, 27 Aug 2018, S. Adamčík (SAV F-20342).</p><p><b>Notes.</b></p><p><i>Dermoloma angustisporum</i> is a member of <i>D. subgenus Amylospora</i>, section <i>Atrobrunnea</i>. The narrow spores (Q = 1.6–1.8) make it morphologically distinct from other species with similar small mycenoid basidiomata. In the phylogeny it forms a distinct clade with <i>D. applanatum</i> (Fig. 2), a species with similar spores but with much larger collybioid basidiomata (see below).</p> |
| title | Dermoloma angustisporum Jancovic. & Karich 2025, sp. nov. |
| topic | Biodiversity Taxonomy Fungi Basidiomycota Agaricomycetes Agaricales Tricholomataceae Dermoloma Dermoloma angustisporum |
| url | https://doi.org/10.5281/zenodo.15857854 |