Ligninsphaeriopsis Phukhamsakda, J.F. Zhang & K.D. Hyde, gen. nov.

MycoBank number: MB 557245; Index Fungorum number: IF 557245; Facesoffungi number: FoF 07528.

Etymology – In reference to its similarity to Ligninsphaeria.

Saprobic on submerged wood in stream habitat. Sexual morph: Ascomata solitary, gregarious, scattered, immersed, only black, elongated, and shiny ostioles part are visible, sub- globose or compressed globose to obpyriform, flattened base, coriaceous, carbonaceous at outer layer and apex, dark brown to black, rough-walled, papillate, ostiolate. Ostiole central, with a crest- like apex, elongated and laterally compressed, irregular-walled, black, papillate, opened pore, carbonaceous, ostiolate with periphyses. Peridium comprises multilayer, coriaceous to carbonaceous, composed of two strata, an outer stratum thick-walled and black cells arranged in a textura angularis, with carbonaceous, outer layer composed of 2 layers of dark brown to light brown cells of textura angularis and inner layer of dark brown to black cells of textura angularis, cells towards the inside lighter, with 6–7 layers of lightly pigmented, grey brown, inner layer composed of a hyaline gelatinous layer. Hamathecium comprising dense, filiform branches, anastomosing above asci, transverse septate, trabeculate pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, broad-clavate with tapering to pedicel, apically rounded, ocular chamber clearly visible when immature. Ascospores 2-seriate or overlapping, broad fusiform, narrow towards the apex, initially hyaline, becoming brown to dark brown at maturity, 6–9-septate, constricted at the septa, with cell above central septum wider, rough-walled, indentations present, with verruculose surface, surrounded by sheath drawn out form polar appendages. Asexual morph: Undetermined.

Type speciesLigninsphaeriopsis thailandica Phukhamsakda, J. F. Zhang & K. D. Hyde.