Quintaria microspora Yin. Zhang, K.D. Hyde & J. Fourn.
Index Fungorum number: IF 540786
Etymology: microsporum, referring to the small ascospores.
Holotype: IFRD 10050
Sexual morph: Ascomata (240–)340–390 µm high, 300–400 µm long, 210–270 wide, laterally compressed, subglobose to globose in frontal view, fusiform in sagittal section, loosely clustered, immersed, apex thickened, elongate in the axis of the wood fibres, 130–200 µm long, crest-like. Peridium 23–28 µm thick, up to 45 µm thick at the apex, composed of a few layers of small pseudoparenchymatous cells of textura angularis to compressed cells near the base, irregularly melanized, more heavily melanized at the apex. Hamathecium of dense, very long narrow trabeculate pseudoparaphyses 0.8 µm broad at apex, 2 µm at base, anastomosing between and above the asci, embedded in mucilage. Asci 90–133 × 11.5–15.3 µm, 8-spored, clavate, with a narrowed, furcate pedicel, bitunicate but rather thin-walled, fissitunicate, with an inconspicuous ocular chamber, not bluing in Melzer’s reagent. Ascospores 26–31 × 5–5.5 µm, 2–3-seriate, narrowly fusiform, hyaline, 5–7-septate, constricted at the medium septum, slightly constricted at other septa, smooth, containing a large globule in each cell, no sheath or appendages observed in India ink. (Zhang et al. 2012). Asexual morph: Undetermined.
Material examined: FRANCE, Ariège, Rimont, Peyrau, ruisseau de Peyrau stream, on submerged wood of Fraxinus excelsior in the bed of a stream, July 2006, leg. Jacques Fournier (IFRD 10050, holotype)
Freshwater distribution: France (Zhang et al. 2008)