Aquabispora setosa J. Yang, E.B.G. Jones & K.D. Hyde, sp. nov.
MycoBank number: MB 559829; Index Fungorum number: IF 559829; Facesoffungi number: FoF 12840;
Etymology: referring to the setose ascomata.
Holotype: HKAS 124629
Saprobic on decaying wood submerged in freshwater. Asexual morph: Undetermined. Sexual morph: Ascomata scattered or aggregated, superficial, perithecial, 280–450 μm high, 250–350 μm diam., subglobose to obpyriform, dark brown, ostiolate, setose, papillate. Ostiole periphysate. Setae lanceolate, stiff, dark brown, 1–2-septate, scattered over ascoma densely clustered around the ostiole, 150–230 µm long, 6–8 µm wide at base, originating from surface cells of ascomata wall. Ascomatal wall coriaceous, 25–55 µm thick, consisting of multi-layered cells of textura angularis, with pale brown, thick-walled cells to hyaline, thin-walled, elongated cells from outer to inner layer. Paraphyses abundant, persistent, septate, hyaline, some constricted at the septa, thin-walled, 3.5–7.8 µm wide. Asci (215–)245–345(–370) × 35.5–89 µm ( = 290 × 63 µm, n = 20), few, unitunicate, broadly cylindrical-clavate, straight or slightly curved, rounded or papillate at the apex, 2-spored, rarely 1-spored, with a non-amyloid apical apparatus which has a central pore and retraction of plasmalemma, short stalked. Ascospores (88–)100–139(–148) × (38–)45–62 µm ( = 118 × 52 µm, n = 40), uniseriate, cylindrical, oblong, broadly rounded at both ends, hyaline when young, brown when mature, muriform, dictyosporous with 7–11 (mostly 9) transverse septa and 1–3 longitudinal septa, smooth-walled, thin-walled, surrounded by a mucilaginous sheath with undulate edge.