Pseudoplagiostoma fagacearum Ning Jiang 2025, sp. nov.
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2025
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| author | Jiang, Ning Xue, Han Li, Yong |
| author_facet | Jiang, Ning Xue, Han Li, Yong |
| contents | <p><i>Pseudoplagiostoma fagacearum</i> Ning Jiang sp. nov.</p><p>Fig. 3</p><p><b>Etymology.</b></p><p>Named after the host family, <i>Fagaceae</i>.</p><p><b>Diagnosis.</b></p><p>Distinct from <i>Ps. castanopsidis</i> by longer conidia; and from <i>Ps. jasmini</i>, <i>Ps. jianfenglingense</i>, <i>Ps. neocastanopsidis</i> and <i>Ps. quercus</i> by wider conidia.</p><p><b>Typus.</b></p><p>CHINA • Guizhou Province, Zunyi City, Suiyang County, Kuankuoshui Natural Reserve, on diseased leaves of <i>Quercus engleriana</i>, 23 November 2019, Dan-ran Bian (<b>holotype</b> CAF 800039; ex-type culture CFCC 54425).</p><p><b>Description.</b></p><p><i>Conidiomata</i> pycnidial, solitary, erumpent, globose to pulvinate, brown, 400–750 μm diam., exuding a brown conidial mass. <i>Conidiophores</i> indistinct, often reduced to conidiogenous cells. <i>Conidiogenous cells</i> hyaline, smooth, lageniform to ampulliform, attenuate towards the apex, phialidic, 13.5–18.5 × 4–5.5 μm. <i>Conidia</i> holoblastic, aseptate, hyaline, smooth, thick-walled, multi-guttulate, ellipsoid, oblong-cylindrical, slightly constricted at the middle, slightly curved, base tapering to a flat protruding scar, (18 –) 18.5–21 (– 22.5) × (10.5 –) 11–13 (– 14) μm (n = 50), L / W = 1.4–2.1, with a prominent hilum.</p><p><b>Culture characteristics.</b></p><p><i>Colonies</i> on PDA flat, spreading, with flocculent aerial mycelia and floccose margin, vinaceous buff, reaching 90 mm diam. after 1 week at 25 ° C, forming brown conidiomata with brown conidial masses. <i>Colonies</i> on MEA flat, dense, surface folded, with moderate flocculent aerial mycelia and even margin, lavender gray to buff, reaching 70 mm diam. after 2 weeks at 25 ° C, sterile. <i>Colonies</i> on SNA flat, spreading, with sparse aerial mycelia and smooth margin, white to rosy buff, reaching 70 mm diam. after 2 weeks at 25 ° C, sterile.</p><p><b>Additional materials examined.</b></p><p>CHINA • Guizhou Province, Zunyi City, Suiyang County, Kuankuoshui Natural Reserve, on diseased leaves of <i>Quercus engleriana</i>, 23 November 2019, Dan-ran Bian (cultures CFCC 54446 and CFCC 54410); • Guizhou Province, Zunyi City, Honghuagang District, Zunyi Normal University, on diseased leaves of <i>Castanopsis choboensis</i>, 24 November 2019, Shang Sun (culture CFCC 54449); • Hainan Province, Changjiang Li Autonomous County, Bawangling National Forest Park, on diseased leaves of <i>Cyclobalanopsis patelliformis</i>, 30 March 2019, Yong Li (culture CFCC 54393).</p><p><b>Distribution.</b></p><p>China, Guizhou and Hainan Provinces.</p><p><b>Ecology.</b></p><p>Associated with leaf spot disease of <i>Castanopsis choboensis</i>, <i>Cyclobalanopsis patelliformis</i> and <i>Quercus engleriana</i>.</p><p><b>Notes.</b></p><p>Five isolates obtained from leaf spots of <i>Castanopsis choboensis</i>, <i>Cyclobalanopsis patelliformis</i>, and <i>Quercus engleriana</i> formed a well-supported clade, which is newly described here as <i>Pseudoplagiostoma fagacearum</i>. This species is phylogenetically closely related to <i>Ps. castanopsidis</i>, <i>Ps. jasmini</i>, <i>Ps. jianfenglingense</i>, <i>Ps. neocastanopsidis</i> and <i>Ps. quercus</i> (Fig. 1). However, <i>Ps. fagacearum</i> (18.5–21 × 11–13 μm) has wider conidia than <i>Ps. jasmini</i> (14–22 × 6.5–11 μm), <i>Ps. jianfenglingense</i> (19–22 × 8.5–11 μm), <i>Ps. neocastanopsidis</i> (19–22 × 9–10 μm), and <i>Ps. quercus</i> (17–21 × 9.5–11 μm), and longer conidia than <i>Ps. castanopsidis</i> (16.5–19.8 × 8.7–12.8 μm) (Gomdola et al. 2023; Zhang et al. 2025).</p> |
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| publishDate | 2025 |
| publisher | Zenodo |
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| spellingShingle | Pseudoplagiostoma fagacearum Ning Jiang 2025, sp. nov. Jiang, Ning Xue, Han Li, Yong Biodiversity Taxonomy Fungi Ascomycota Sordariomycetes Diaporthales Fagaceae Pseudoplagiostoma Pseudoplagiostoma fagacearum <p><i>Pseudoplagiostoma fagacearum</i> Ning Jiang sp. nov.</p><p>Fig. 3</p><p><b>Etymology.</b></p><p>Named after the host family, <i>Fagaceae</i>.</p><p><b>Diagnosis.</b></p><p>Distinct from <i>Ps. castanopsidis</i> by longer conidia; and from <i>Ps. jasmini</i>, <i>Ps. jianfenglingense</i>, <i>Ps. neocastanopsidis</i> and <i>Ps. quercus</i> by wider conidia.</p><p><b>Typus.</b></p><p>CHINA • Guizhou Province, Zunyi City, Suiyang County, Kuankuoshui Natural Reserve, on diseased leaves of <i>Quercus engleriana</i>, 23 November 2019, Dan-ran Bian (<b>holotype</b> CAF 800039; ex-type culture CFCC 54425).</p><p><b>Description.</b></p><p><i>Conidiomata</i> pycnidial, solitary, erumpent, globose to pulvinate, brown, 400–750 μm diam., exuding a brown conidial mass. <i>Conidiophores</i> indistinct, often reduced to conidiogenous cells. <i>Conidiogenous cells</i> hyaline, smooth, lageniform to ampulliform, attenuate towards the apex, phialidic, 13.5–18.5 × 4–5.5 μm. <i>Conidia</i> holoblastic, aseptate, hyaline, smooth, thick-walled, multi-guttulate, ellipsoid, oblong-cylindrical, slightly constricted at the middle, slightly curved, base tapering to a flat protruding scar, (18 –) 18.5–21 (– 22.5) × (10.5 –) 11–13 (– 14) μm (n = 50), L / W = 1.4–2.1, with a prominent hilum.</p><p><b>Culture characteristics.</b></p><p><i>Colonies</i> on PDA flat, spreading, with flocculent aerial mycelia and floccose margin, vinaceous buff, reaching 90 mm diam. after 1 week at 25 ° C, forming brown conidiomata with brown conidial masses. <i>Colonies</i> on MEA flat, dense, surface folded, with moderate flocculent aerial mycelia and even margin, lavender gray to buff, reaching 70 mm diam. after 2 weeks at 25 ° C, sterile. <i>Colonies</i> on SNA flat, spreading, with sparse aerial mycelia and smooth margin, white to rosy buff, reaching 70 mm diam. after 2 weeks at 25 ° C, sterile.</p><p><b>Additional materials examined.</b></p><p>CHINA • Guizhou Province, Zunyi City, Suiyang County, Kuankuoshui Natural Reserve, on diseased leaves of <i>Quercus engleriana</i>, 23 November 2019, Dan-ran Bian (cultures CFCC 54446 and CFCC 54410); • Guizhou Province, Zunyi City, Honghuagang District, Zunyi Normal University, on diseased leaves of <i>Castanopsis choboensis</i>, 24 November 2019, Shang Sun (culture CFCC 54449); • Hainan Province, Changjiang Li Autonomous County, Bawangling National Forest Park, on diseased leaves of <i>Cyclobalanopsis patelliformis</i>, 30 March 2019, Yong Li (culture CFCC 54393).</p><p><b>Distribution.</b></p><p>China, Guizhou and Hainan Provinces.</p><p><b>Ecology.</b></p><p>Associated with leaf spot disease of <i>Castanopsis choboensis</i>, <i>Cyclobalanopsis patelliformis</i> and <i>Quercus engleriana</i>.</p><p><b>Notes.</b></p><p>Five isolates obtained from leaf spots of <i>Castanopsis choboensis</i>, <i>Cyclobalanopsis patelliformis</i>, and <i>Quercus engleriana</i> formed a well-supported clade, which is newly described here as <i>Pseudoplagiostoma fagacearum</i>. This species is phylogenetically closely related to <i>Ps. castanopsidis</i>, <i>Ps. jasmini</i>, <i>Ps. jianfenglingense</i>, <i>Ps. neocastanopsidis</i> and <i>Ps. quercus</i> (Fig. 1). However, <i>Ps. fagacearum</i> (18.5–21 × 11–13 μm) has wider conidia than <i>Ps. jasmini</i> (14–22 × 6.5–11 μm), <i>Ps. jianfenglingense</i> (19–22 × 8.5–11 μm), <i>Ps. neocastanopsidis</i> (19–22 × 9–10 μm), and <i>Ps. quercus</i> (17–21 × 9.5–11 μm), and longer conidia than <i>Ps. castanopsidis</i> (16.5–19.8 × 8.7–12.8 μm) (Gomdola et al. 2023; Zhang et al. 2025).</p> |
| title | Pseudoplagiostoma fagacearum Ning Jiang 2025, sp. nov. |
| topic | Biodiversity Taxonomy Fungi Ascomycota Sordariomycetes Diaporthales Fagaceae Pseudoplagiostoma Pseudoplagiostoma fagacearum |
| url | https://doi.org/10.5281/zenodo.15794735 |