Pyriculariomyces asari (Crous & M.J. Wingf.) Y. Marín, M.J. Wingf. & Crous, Stud. Mycol. 92: 119. 2019. (Type species).

Ascomata perithecial, immersed, solitary or gregarious, brown, up to 200 µm diam, with a papillate neck. Paraphyses dissolving at maturity. Asci 8-spored, unitunicate, cylindrical to clavate, 50–75 × 10–12 µm, with a refractive ring. Ascospores biseriate, fusiform to ellipsoidal, straight or slightly curved, 3-septate, light brown, smooth, (16–)18–20(–22) × (4–)5 µm. Asexual state pyricularia-like. Conidiophores solitary, erect, straight or curved, unbranched, subcylindrical, 1–8-septate, brown, smooth, 55–200 × 3.5–5 µm. Conidiogenous cells integrated, terminal, brown, smooth, 25–60 × 3.5–5 µm, with several protruding denticles, 1–1.5 × 1–1.5 µm. Conidia solitary, pyriform, 2-septate, brown, (20–)22–24(–26) × (6.5–)7–8 µm, with a truncate basal hilum (Description from Crous et al., 2016).

Typification: Holotype CBSH-22625. Ex-holotype culture CBS141328.

Gene sequences: KX228291 (ITS), KX228361 (ACT), MG934541 (CAL), KX228368 (RPB1).

Hosts/substrates: On leaves and stems of Asarum (Aristolochiaceae).

Distribution: Malaysia.