Setophaeosphaeria microspora Z. F. Zhang & L. Cai 2020

Setophaeosphaeria microspora Z. F. Zhang & L. Cai (2020) Fig. 10 Description. Sexual morph undetermined. Asexual morph Conidiomata 170–240 µm, pycnidial, brown, globose, ostiolate, submerged or superficial on PDA. Setae brown, straight to slightly curved, thick-walled, smooth, septate, up to 160–250 µm long, 3.5–4.0 µm wide at broadest part. Pycnidial wall textura angularis to globulosa, brown to dark brown, multi-layers. Conidiogenous cells hyaline, subglobose, smooth-walled, 3.3–4.5 µm × 2.3–3.5 µm (x ̄ = 3.9 × 2.9 µm, n = 15). Conidia hyaline, cylindrical, obtuse ends, aseptate, with 2 small but obvious guttules, 3.2–4.0 µm × 1.3–1.7 µm (x ̄ = 3.7 × 1.4 µm, L / W ratio = 2.54, n = 30). Culture characteristics. Colony reaching 35 mm diam with dark grayish-green in center, beige in margin, velvety, entire edge, and similar to reverse side of the colony. Material examined. TAIWAN • Guanshan Township, Taitung County, 23°02'12.8"N, 121°11'22.0"E, serpentine soil in rice field, 2 nd November 2022, K. W Cheng, living culture NTUPPMCC 22-225 and NTUPPMCC 22-226. Notes. The strains named NTUPPMCC 22-225 and NTUPPMCC 22-226 isolated in the present study clustered with ex-type strain Setophaeosphaeria microspora CGMCC 3.19301 with high statistical support, confirming their identification as Se. microspora (Fig. 11). However, Se. microspora (NTUPPMCC 22-225) exhibited smaller conidiogenous cells than the type strain CGMCC 3.19301 (3.5–4.5 µm × 2.5–3.5 µm versus 7.0–10.0 µm × 2.5–4.0 µm) (Fig. 10; Zhang et al. 2020). This study represents the first report of Setophaeosphaeria in Taiwan.