Curvularia neergaardii (Danquah) Y.P. Tan & R.G. Shivas, Australas. Pl. Pathol.

Manamgoda, Dimuthu S., Rossman, Amy Y., Castlebury, Lisa A., Chukeatirote, Ekachai & Hyde, Kevin D., 2015, A taxonomic and phylogenetic re-appraisal of the genus Curvularia (Pleosporaceae): human and plant pathogens, Phytotaxa 212 (3), pp. 175-198 : 190

Curvularia neergaardii (Danquah) Y.P. Tan & R.G. Shivas, Australas. Pl. Pathol. 43: 600 (2014). ( Fig. 7 )

Basionym : Drechslera neergaardii Danquah, Trans. Brit. mycol. Soc. 64: 545. 1975.

≡ Bipolaris neergaardii (Danquah) Alcorn, Mycotaxon 17: 68. 1983.

= Cochliobolus neergaardii Alcorn, Mycotaxon 39: 385. 1990. (fide Alcorn 1990).

Type material:— AUSTRALIA, paired cultures on Dactyloctenium aegyptium leaves, 10August 1988, J. L Alcorn (holotype of Cochliobolus neergaardii BRIP 16385!); ibid. (isotype of Cochliobolus neergaardii IMI 335219!).

On Dactyloctenium aegyptium , ascomata 190–362 μm (–490) × (142–)206–306(–350) μm (av. = 286 SD = 76 n = 15; av. = 256 SD = 50 n = 14) diameter, singly or in groups of few, black, globose or ovoid, often on thin or flat basal stroma. Ostiolar neck cylindrical or widen below, often bearing short board setae. Asci (88–)109–145 × 9–13 μm (av. = 127 SD = 18 n = 15; av. = 11 SD = 2 n = 15), straight or curved, cylindrical slightly accentuated at base. Ascospores (85–)93–135(–160) × 2–4 μm, hyaline, filiform, tapered slightly towards apex, loosely coiled inside ascus, sometimes parallel form middle part of ascus, 3–7 septate.

Asexual morph on Dactyloctenium aegyptium , conidiophores up to 150 μm long, 4–8 μm thick, pale to mid brown, straight or flexuous, geniculate towards apex, cylindrical, septate, sometimes swollen at base. Conidia 19–30 × 15–18 μm, straight, broadly ellipsoidal, mid brown to dark brown, slightly verruculose, 2–3-distoseptate. Hilum inconspicuous (Modified from Sivanesan 1987).

Hosts:— Dactyloctenium aegyptium , also reported on Callistephus chinensis , Hibiscus esculentus , Oryza sativa , Pennisetum sp. , Sesamum indicum , Setaria geniculata , Sorghum sp. , Triticum sp. ( Farr & Rossman 2014)

Distribution:— Australia, Chile, also reported from China, Ghana, Iran, India, Saudi Arabia ( Farr & Rossman 2014).

Additional material examined:— CHILE, on desert soil, E. Piontelli, ( DAOM 228085!).

Notes:—The species is phylogenetically closely related to Curvularia ellisii . However C. ellisii produces longer ascospores (115–285 μm) with more septa (7–22) ( Sivanesan 1987).

Figures

FIGURE 7. Curvularia neergaardii (IMI 335219). A) Ascomata on Dactyloctenium aegyptium leaves B) Ascomata C) Cross section of ascomata D) Asci and pseudoparaphyses E–G) Asci. (Scale bars A = 200 μm B = 100 μm C, D = 20 μm E = 5 μm F,G = 10 μm).