Erioscyphella lataspora C.J.Y. Li, K. D. Hyde & Q. Zhao, sp. nov. Fig. 3
MycoBank number: MB; Index Fungorum number: IF; Facesoffungi number: FoF 12759;
Saprobic on the newly fallen trunk. Sexual morph: Apothecia 1–2.5 mm wide × 1.5–3.8 mm high (x̅ = 1.6 × 2.5 mm, n = 50) when dry, superficial, arising scattered or in clusters, cup-shaped, long-stipitate, covered with long, white hairs. Disc circular, concave and smooth, deep yellow to orange-yellow (4A8-4B8). Receptacle cupulate, concolorous, covered with white hairs. Stipe 0.3–0.7 mm wide × 1–2.8 mm long (x̅ = 0.5 × 1.7 mm, n = 30), concolorous with receptacle, long and narrow with whitish hairs, blackish and hairless base. Hairs 69–89 μm long × 3.4–4.4 μm wide (x̅ = 80 × 3.8 mm, n = 10), scaled and tilted outward, arising from the outermost layer cells of ectal excipulum, slightly curved, cylindric with blunt ends, thin-walled, densely covered with colorless granules, septate, hyaline. Hymenium 154–173 μm, hyaline to pale yellow. Ectal excipulum 23–29 μm thick, comprised of 1–3 layers, thin-walled, poor-developed hyaline cells of textura angularis at the receptacle, comprised of thin-walled, septate, hyaline hyphae of textura intricata with yellowish contents at stipe, non-gelatinous. Medullary excipulum 152–267 μm thick, 1.9–3.9 μm wide, comprised of thin-walled, septate, hyaline, loosely packed hyphae of textura intricata with yellowish contents, non-gelatinous. Subhymenium 41–50 μm, hyaline to pale yellow (4A3), comprising tightly packed hyphae of textura intricata with yellowish contents. Paraphyses 2.2–3.8 μm (x̅ = 2.9 μm, n = 30) in the widest, hyaline, thick-walled, narrow lanceolate, septate, unbranched, observed conspicuous contents, extending beyond the asci. Asci 121–142 × 9–12 μm (x̅ = 132 × 10 μm, n = 40), 8–spored, cylindric or subclavate, rounded to subconical apex with J+ apical ring in Melzer’s reagent, tapering to subtruncate base. Ascospores (21–)22–27(–31) × (4.1–)4.4–5.4(–5.8) μm (x̅ = 25 × 4.9 μm, n = 100), Q = (4.2–)4.4–5.7(–6.1) μm, Qm = 5.0 ± 0.2 μm, overlapping uniseriate, fusiform with sharp ends, hyaline, thin-walled, smooth, 3–4-septate, four or more large guttules.
Asexual morph – Undetermined.
Fig. 3 Erioscyphella lataspora. a–b Fresh ascomata on the wood. c Dried ascomata on the wood. d Vertical section of ascomata. e Ectal excipulum. f Medullary excipulum. g–h Hairs. i–j Paraphyses. k–m Asci (m Asci in Meltzer’s reagent). n–q Ascospores (p-q Ascospores in Meltzer’s reagent). Scale bar: c = 1500 μm, d = 500 μm, e = 25 μm, f = 35 μm, g = 50 μm, h = 30 μm, i = 100 μm, j = 50 μm, k–m = 70 μm, n–q = 10 μm.