Kwanghwana Karun., C.H.Kuo & K.D.Hyde, 2020

Karunarathna, Anuruddha, Phookamsak, Rungtiwa, Jayawardena, Ruvishika S., Hyde, Kevin D. & Kuo, Chang H., 2020, Kwanghwana miscanthi Karun., C. H. Kuo & K. D. Hyde, gen. et sp. nov. (Phaeosphaeriaceae, Pleosporales) on Miscanthus floridulus (Labill.) Warb. ex K. Schum. & Lauterb. (Poaceae), Cryptogamie, Mycologie 20 (6), pp. 119-132 : 124

Kwanghwana Karun., C.H.Kuo & K.D.Hyde , gen. nov.

INDEX FUNGORUM NUMBER. — IF557100.

FACESOFFUNGI NUMBER. — FoF 07775.

ETYMOLOGY. — Refers to the collection site Kwang Hwa.

TYPE SPECIES. — Kwanghwana miscanthi Karun., C.H.Kuo & K.D.Hyde , sp. nov.

DESCRIPTION

Associated with Miscanthus floridulus (Poaceae) leaf sheath.

Sexual state

Ascomata. Immersed or semi-immersed, visible as minute black dots on host surface, uniloculate, subglobose, brown to dark brown, solitary; centrally ostiolate, circular, papillate.

Peridium. With 7-9 layers at the apex and 3-4 layers at the base, thinner towards the base, the outer layers composed of brown, thick-walled cells of textura angularis, the inner layers composed of hyaline to pale brown, thin-walled cells of textura prismatica.

Hamathecium. Composed of numerous, hyaline, frequently septate, broadly cellular wide pseudoparaphyses,often constricted at the septa, branching at the mid-point, embedded in mucilage.

Asci. 8-spored, bitunicate, cylindrical to cylindric-clavate, short pedicellate, apically rounded with well-developed narrow ocular chamber, smooth-walled, arising from the base of the ascoma. Ascospores. Fusiform, broadly fusoid with rounded ends, hyaline, overlapping or irregularly biseriate, 3-septate, the cells above and below are broader, upper cell is comparatively broader, smooth-walled with large guttules. Ascospores germinate within 12 hours on PDA, geminating from end cells.

Asexual state

Unknown.

NOTES

The new genus Kwanghwana Karun., C.H.Kuo & K.D.Hyde , gen. nov., is morphologically and phylogenetically well supported (100% ML/1.00 BYPP).