Pseudopestalotiopsis cyclobalanopsidis N. Jiang.
MycoBank number: MB 841313; Index Fungorum number: IF 841313; Facesoffungi number: FoF 11701;
Description
Pathogenic to host leaves. Asexual state: Conidiomata in culture sporodochial, aggregated or solitary, erumpent, pulvinate, black, 450–1200 μm diam., exuding black conidial masses. Conidiophores indistinct, usually reduced to conidiogenous cells. Conidiogenous cells hyaline, smooth, cylindrical to subcylindrical, annelidic, 5.5–11 × 3–4 μm, mean ± SD = 8.2 ± 1.8 × 3.7 ± 0.5 μm. Conidia fusoid, straight or slightly curved, 4-septate, smooth, slightly constricted at the septa, (17.5–)19–22(–23) × (6.5–)7–9(–9.5) μm, mean ± SD = 20.6 ± 1.7 × 7.9 ± 1 μm (n = 50), L/W = 2.2–3.6; basal cell obconic with a truncate base, thin-walled, hyaline or pale brown, (3–)3.5–5 μm; median cells 3, trapezoid or subcylindrical, concolourous, brown, thick-walled, the first median cell from base (4–)4.5–5 μm long, the second cell 4–5 μm long, the third cell (4.5–)5–5.5 μm long, together 13.5–15 μm long; apical cell conic with an acute apex, thin-walled, hyaline, 2.5–3.5 μm long; basal appendage unbranched, tubular, knobbed, centric, straight or slightly bent, (4–)4.5–6.5 μm long, mean ± SD = 5.5 ± 0.7 μm; apical appendages (2–)3, unbranched, tubular, knobbed, centric, straight or slightly bent, (15–)16.5–22.5(–24) μm long, mean ± SD = 19.4 ± 2.6 μm. Sexual morph unknown.
Material examined: China, Hainan Province, Changjiang Li Autonomous County, Bawangling National Forest Park, on diseased leaves of Cyclobalanopsis glauca (Fagaceae), 30 March 2019, Yong Li (holotype CAF 800026 = JNH0022; ex-holotype culture CFCC 52806).
Distribution: China
Sequence data: ITS: OK339745 (ITS1/ITS4); tef1: OK358521 (EF1-728F/EF2); tub2: OK358506 (Bt2a/Bt2b)
Notes: Leaf pathogens.
Fig. 22. Morphology of Pseudopestalotiopsis cyclobalanopsidis (CFCC 52806). A. Colony on PDA after 10 d at 25 °C; B. Colony on MEA after 10 d at 25 °C; C. Conidioma formed on PDA; D, E. conidiogenous cells giving rise to conidia; F, G. conidia. — Scale bars: C = 500 μm; D–G = 10 μm.