The sexual morph of Diplodia acerigena (HKAS 125891, holotype) a, b appearance of ascomata on natural substrate c vertical section of ascoma d ostiole e section of peridium f–h asci with hyaline ascospores i asci with brown 2-sepatate ascospores j, k hyaline immature aseptate ascospores l–n mature brown 2-septate ascospores o germinated ascospore p upper view of the colony on PDA after 14 d q reverse view of the colony on PDA after 14 d. Scale bars: 100 μm (c); 10 μm (d, e, j–o); 20 μm (f–i).