Curvularia chiangmaiensis Y. Marín, Senwanna & Crous, Mycosphere 8: 1565 (2017)

MycoBank number: MB 822082; Index Fungorum number: IF 822082; Facesoffungi number: FoF 12887 Figure 4

Asexual morph: Conidiophores 70–180 × 3.5–4 μm (x̅ = 123 × 3.8 μm, n = 20), single, straight or flexuous, septate, sometimes geniculate in the upper part, micronematous to macronematous, mononematous, pale brown to brown, paler towards apex. Conidiogenous cells polytretic, proliferating sympodially, cylindrical to subcylindrical, hyaline to pale brown, smooth-walled, terminal or intercalary. Conidia 14–28 × 9–13 (x̅ = 21 × 11 μm, n = 25) μm, ellipsoidal to obovoid, sometimes curved, slightly verruculose, hyaline to pale brown, (2–)3-distoseptate, hila slightly conspicuous, 1.5–2.5 μm (x̅ = 2). Sexual morph: Undetermined.

Culture characteristics: Colonies on PDA at 25 ℃, flat, irregular margin, cottony, yellowish brown to black surface, 3.5 cm diam. after 7 days, reverse black center, brownish black at margin. Hyphae 1.5–4 μm (x̅ = 3 μm) wide, often branched, rarely guttulate, smooth to rough-walled, sometimes geniculate, hyaline when immature and later become pale brown (melanized) to brown septate. Chlamydospores guttulated, initially hyaline and becoming pale brown to brown (melanized) when mature.

Known hosts and substrates:Zea mays, Saccharum officinarum and on soil (Marin-Felix et al.2017b, Raza et al. 2019, this study)

Known distribution: — China and Thailand (Marin-Felix et al.2017b, Raza et al. 2019, this study).

Material examined: —Thailand, Krabi, 8°4’11″N 98°53’25″E, 181m, on forest soil, 28 October 2019, E. Yasanthika (MFLU*****); living culture, MFLUCC 22-0084

Figure 4: Curvularia chiangmaiensis (Kr 10) (MFLUCC 22-0084 new record) a Colony from above (on PDA). b Colony from below (on PDA). c Sporulated colony with conidial attachments on the mycelium. d. Immature hyphae e Mature melanized hyphae. f Hyaline chlamydospores. g Melanized chlamydospores h Macronematous conidiogenesis on the conidiophore. i–m Conidiogenesis. n–s Conidia. Scale bars: g = 25 μm, d–f, h–l = 20 μm, m–s= 10 μm