Microdochium nigrum Y. X. Shang, Q. Y. Liu, X. G. Zhang & Z. Li 2026, sp. nov.

作者：Qiyun Liu, Yuxin Shang, Jinyang Yuan, Zhaoxue Zhang, Congcong Ai, Ji-Wen Xia, Xiu-Guo Zhang, Zhuang Li · 发表于：Open MIND · 年份：2026 · DOI：10.5281/zenodo.20663696 · 研究领域：Plant Pathogens and Fungal Diseases、Mycorrhizal Fungi and Plant Interactions、Slime Mold and Myxomycetes Research

Microdochium nigrum Y. X. Shang, Q. Y. Liu, X. G. Zhang & Z. Li sp. nov. Fig. 12 Etymology. The specific epithet “ nigrum ” refers to the host plant Phyllostachys nigra. Type. CHINA • Guangdong Province, Shaoguan City, Renhua County, on leaves of Phyllostachys nigra, 03 March 2025, Y. X. Shang (holotype HSAUP 17349-2), ex-type culture SAUCC 17349-2 = CGMCC 3.29428. Description. On leaves of Phyllostachys nigra. Asexual morph: Mycelium immersed and superficial, abundant, hyphae hyaline, branched, septate, thin-walled, guttulate, 1.11–3.05 µm wide. Conidiophores more or less mono- or biverticillate, metulae clavate to cylindrical. Conidiogenous cells polyblastic, with percurrent proliferations, ampulliform, lageniform to subcylindrical, 4.47–10.25 × 1.90–3.42 μm (av. = 6.02 ± 2.03 × 2.40 ± 0.53 μm, n = 17). Conidia lunate, allantoid, curved, with one side straighter than the other, 5.92–8.61 × 1.72–2.69 μm (av. = 7.32 ± 0.71 × 2.22 ± 0.32 μm, n = 31), base flattened. Sometimes produced directly on the mycelial hyphae. Chlamydospores not observed. Sexual morphs unknown, see Fig. 12. Culture characteristics. Colonies on PDA. 45.21–47.19 mm in diameter after 7 d at 25 ° C in darkness, with a growth rate of 6.45–6.74 mm / day, entire at edge, white in obverse and reverse. Additional specimen examined. CHINA • Guangdong Province, Shaoguan City, Renhua County, on leaves of Phyllostachys nigra, 03 March 2025, Y. X. Shang (HSAUP 17349-2 A), living culture SAUCC 17349-2 A. Notes. Microd...