Tiarosporella Höhn., in Weese, Mitt. bot. Inst. tech. Hochsch. Wien 1(3): 82 (1924)

Index Fungorum Number: IF 10233.

Saprobic on grasses in terrestrial habitats. Sexual morph: Ascomata immersed to erumpent on host tissue, visible as black spots on host tissue, uniloculate, scattered or gregarious, globose to subglobose. Ostiole circular, central, papillate. Peridium broader at the base, comprising 2 layers: outer layer thin, of small, brown to dark brown cells of textura angularis, inner layer thick, of large, hyaline to lightly pigmented, cells of textura angularis. Hamathecium comprising hyphae-like, hyaline and sparse pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, clavate to cylindro-clavate, pedicellate, apically rounded with an ocular chamber. Ascospores uni to bi-seriate at the ascus apex, 1-seriate at the base, hyaline, aseptate, ellipsoidal, fusiform, usually wider in the middle, wall rough, surrounded by a mucilaginous sheath. Asexual morph: Pycnidia solitary, scattered or grouped, globose, dark brown to black, immersed to semi-immersed, pulvinate, unilocular or multilocular, with long necks, ostiolate. Ostiole circular and covered with hyaline to light brown or grey-olivaceous, simple, septate, straight or flexuous, smooth or verruculose pycnidial hairs with obtuse ends. Pycnidial wall several cell layers thick, outer layers composed of dark-brown textura angularis, becoming thin-walled and hyaline towards the inner region. Conidiogenous cells formed from the cells lining the inner walls of the pycnidia, holoblastic, determinate, hyaline, fusiform to cylindrical or ellipsoidal. Conidia solitary, ovoid, straight, oval to fusiform, smooth with fine granular content, thin-walled, hyaline, aseptate, apices rounded or with truncate base and obtuse apex, with or without appendages (Nag Raj 1993; Crous et al., 2006; Jami et al., 2012, 2014; Phillips et al., 2013).