Scleroderma magnisporum Gonkhom, Sysouph. & Thongkl. 2025, sp. nov.
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2025
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| author | Gonkhom, Didsanutda Sysouphanthong, Phongeun Stadler, Marc Thongklang, Naritsada Hyde, Kevin D. |
| author_facet | Gonkhom, Didsanutda Sysouphanthong, Phongeun Stadler, Marc Thongklang, Naritsada Hyde, Kevin D. |
| contents | <p><i>Scleroderma magnisporum</i> Gonkhom, Sysouph. & Thongkl. sp. nov.</p><p>Fig. 4</p><p><b>Diagnosis.</b></p><p>Epigeous basidiomata with irregular club shape, smooth to slightly cracked to squamulose peridial head, brown to burnt umber, sessile or short pseudostipitate stipe, white, pale brown context, with hyphae simple-septate in both endoperidium and exoperidium, dark brown globose to subglobose basidiospores with crowded spines.</p><p><b>Holotype.</b></p><p>Thailand • Chiang Rai Province, Mueang Chiang Rai District, 16 July 2010, collected by Naritsada Thongklang, NTF 062 (MFLU 19-1345).</p><p><b>Etymology.</b></p><p>The species name “ <i>magnisporum</i> ” refers to its larger basidiospores.</p><p><b>Description.</b></p><p>Basidiomata epigeous, 35 mm in height, 22–34 mm in diam., club-shaped, with an irregularly globular peridial head; surface smooth, slightly cracked to squamulose, brown (6 E 5) to burnt umber (6 F 6), on pale orange (5 A 3) background. Sessile or short pseudostipitate (10 mm high), brown (6 E 5). Context thick, up to 5 mm wide. Exoperidium composed of hyphae simple-septate, interwoven, hyaline to yellow, 4.1–5.8 µm in diam. Endoperidium layer formed by hyphae simple-septate, with slightly thickened walls, interwoven, hyaline, 5.8–9.6 µm in diam., and hyphae from the endoperidium toward the gleba are pale yellow (4 A 3) and black in the mature gleba. Clamp connections present on endoperidium hyphae. Basidiospores (n = 50) globose to subglobose, echinulate with crowded curved spines, dark brown in KOH, (7.67 –) 12.42–8.42 (– 13.46) × (10.33 –) 14.53–11.42 (– 15.50) µm including ornamentation. Basidia not seen.</p><p><b>Habitat and distribution.</b></p><p>Solitary on soil, epigeous, in northern Thailand.</p><p><b>Known distribution.</b></p><p>Northern Thailand.</p><p><b>Note.</b></p><p><i>Scleroderma magnisporum</i> is characterized by a smooth, slightly cracked surface and larger basidiospores. The microcharacter of <i>S. magnisporum</i> is similar to that of <i>S. hypogaeum</i> Zeller. However, <i>S. hypogaeum</i>, originally described from Oregon, has a smooth, slightly cracked, or subscaly basidiome, with larger basidiospores up to 22–30 μm diam. (Zeller 1922; Guzmán et al. 2013). <i>S. magnisporum</i> is phylogenetically close to <i>Scleroderma microcarpum</i> (MFLU 19-1347) in this study (Fig. 1). Both species are clearly different in their basidiomata size and shapes; the basidiomata of <i>S. microcarpum</i> are much smaller than those of <i>S. magnisporum</i> (7.6–15.5 µm diam.). While <i>S. yunnanense</i> shares with <i>S. magnisporum</i> a smooth to faintly cracked peridium and large basidiospores (15–20 μm), it has a pale yellow to ochre peridium (Guzmán 1970; Zhang et al. 2013).</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_17295882 |
| institution | Zenodo |
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| publishDate | 2025 |
| publisher | Zenodo |
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| spellingShingle | Scleroderma magnisporum Gonkhom, Sysouph. & Thongkl. 2025, sp. nov. Gonkhom, Didsanutda Sysouphanthong, Phongeun Stadler, Marc Thongklang, Naritsada Hyde, Kevin D. Biodiversity Taxonomy Fungi Basidiomycota Agaricomycetes Boletales Sclerodermataceae Scleroderma Scleroderma magnisporum <p><i>Scleroderma magnisporum</i> Gonkhom, Sysouph. & Thongkl. sp. nov.</p><p>Fig. 4</p><p><b>Diagnosis.</b></p><p>Epigeous basidiomata with irregular club shape, smooth to slightly cracked to squamulose peridial head, brown to burnt umber, sessile or short pseudostipitate stipe, white, pale brown context, with hyphae simple-septate in both endoperidium and exoperidium, dark brown globose to subglobose basidiospores with crowded spines.</p><p><b>Holotype.</b></p><p>Thailand • Chiang Rai Province, Mueang Chiang Rai District, 16 July 2010, collected by Naritsada Thongklang, NTF 062 (MFLU 19-1345).</p><p><b>Etymology.</b></p><p>The species name “ <i>magnisporum</i> ” refers to its larger basidiospores.</p><p><b>Description.</b></p><p>Basidiomata epigeous, 35 mm in height, 22–34 mm in diam., club-shaped, with an irregularly globular peridial head; surface smooth, slightly cracked to squamulose, brown (6 E 5) to burnt umber (6 F 6), on pale orange (5 A 3) background. Sessile or short pseudostipitate (10 mm high), brown (6 E 5). Context thick, up to 5 mm wide. Exoperidium composed of hyphae simple-septate, interwoven, hyaline to yellow, 4.1–5.8 µm in diam. Endoperidium layer formed by hyphae simple-septate, with slightly thickened walls, interwoven, hyaline, 5.8–9.6 µm in diam., and hyphae from the endoperidium toward the gleba are pale yellow (4 A 3) and black in the mature gleba. Clamp connections present on endoperidium hyphae. Basidiospores (n = 50) globose to subglobose, echinulate with crowded curved spines, dark brown in KOH, (7.67 –) 12.42–8.42 (– 13.46) × (10.33 –) 14.53–11.42 (– 15.50) µm including ornamentation. Basidia not seen.</p><p><b>Habitat and distribution.</b></p><p>Solitary on soil, epigeous, in northern Thailand.</p><p><b>Known distribution.</b></p><p>Northern Thailand.</p><p><b>Note.</b></p><p><i>Scleroderma magnisporum</i> is characterized by a smooth, slightly cracked surface and larger basidiospores. The microcharacter of <i>S. magnisporum</i> is similar to that of <i>S. hypogaeum</i> Zeller. However, <i>S. hypogaeum</i>, originally described from Oregon, has a smooth, slightly cracked, or subscaly basidiome, with larger basidiospores up to 22–30 μm diam. (Zeller 1922; Guzmán et al. 2013). <i>S. magnisporum</i> is phylogenetically close to <i>Scleroderma microcarpum</i> (MFLU 19-1347) in this study (Fig. 1). Both species are clearly different in their basidiomata size and shapes; the basidiomata of <i>S. microcarpum</i> are much smaller than those of <i>S. magnisporum</i> (7.6–15.5 µm diam.). While <i>S. yunnanense</i> shares with <i>S. magnisporum</i> a smooth to faintly cracked peridium and large basidiospores (15–20 μm), it has a pale yellow to ochre peridium (Guzmán 1970; Zhang et al. 2013).</p> |
| title | Scleroderma magnisporum Gonkhom, Sysouph. & Thongkl. 2025, sp. nov. |
| topic | Biodiversity Taxonomy Fungi Basidiomycota Agaricomycetes Boletales Sclerodermataceae Scleroderma Scleroderma magnisporum |
| url | https://doi.org/10.5281/zenodo.17295882 |