Pleosporales » Pleosporaceae » Curvularia

Curvularia chiangraiensis

Curvularia chiangraiensis Yasanthika & A.R. Gomes de Farias, sp. nov.

Index Fungorum number: IF559984, Faces of Fungi number: FoF 12886, Fig X.

Etymology – The specific epithet "chiangraiensis" refers to the locality Chiang Rai Province (Thailand), where the holotype was collected.

Holotype –MFLU22-0256

 

Asexual Morph: Conidiophores 50–150 × 2–7 μm (x̅ = 117 × 4 μm, n = 20), simple, unbranched, septate, hyaline to brown, micro- to semi-macro-nematous, sometimes geniculate towards upper region. Conidiogenous cells 7–11 × 3–7 (x̅ = 9 × 5 μm, n = 20), polytretic, terminal or intercalary, sometimes proliferating sympodially, cylindrical to sub-cylindrical, smooth to verruculose. Conidia 12–20 × 6–12 μm (x̅ = 17 × 9 μm, n = 30), sublunate to ellipsoid or obovoid, curved, sub-hyaline to pale brown, 1–2 distoseptate when immature, later becoming 2–3 euseptate and pale brown to brown when mature, smooth to verruculose, swollen when mature, with the third cell from base becoming prominent, partially enlarged along the horizontal axis, asymmetrically curved, darker, verrculose than apical and basal septa, with apical and basal septa symmetrical. Hila inconspicuous to slightly conspicuous, slightly thickened 2–3 μm (x̅ = 2.5 μm) wide. Sexual morph: Undetermined.

Culture characteristics: — Colonies on PDA at 25 ℃ raised, filamentous at margin, with sparse aerial mycelia, greyish brown to black, pale brown concentric rings, approximately 3.5 cm diam. at 7 days, reverse black. Hyphae 3–5 μm (x̅ = 4 μm) wide, branched, septate, hyaline to pale brown when immature and later becoming brown, septate hyphae.

Material examined: — Thailand, Chiang Rai, 20.0478N, 99.7619E, 863m, from forest soil, 23 September 2019. W.A.E. Yasanthika (MFLU22-0256, holotype); ex-type living culture MFLUCC 22-0091)

 

 

 

Fig X. Curvularia chiangraiensis (MFLU22-0256, holotype). 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–k. conidiogenesis. l–p. Conidia. Scale bars: g = 25 μm, d–f, h–l = 20 μm, g, m–p= 10 μm.

 

Retrieved from:

Yasanthika, W. A. E., Tennakoon, D.S., Gomes De Farias, A.R., Chethana, K. W. T. et al. 2023 –  Isolation and characterization of novel Dothideomycetes species from forest soils in Chiang Rai and Krabi (Thailand): additions to the diversity of Curvularia and Verruconis. Phytotaxa 609: 17–44. http://dx.doi.org/10.11646/phytotaxa.609.1.3

 

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