Dicephalospora chiangraiensis K. Phutthacharoen & K.D. Hyde, sp. nov. (Fig. 5)
Facesoffungi number:— FoF 09715
Etymology:—“chiangraiensis” refers to the locality where the fungus was collected.
Holotype:— MFLU 21-0018
Saprobic on dead stems. Sexual morph: Apothecia 290–850 × 250–500 µm (x̄ = 420 × 360µm, n = 10), when dry arising solitary or gregarious, scattered on wood, central short stipitate, superficial, orange when fresh, flat cupulate. Stipe 250–350 µm (x̄ = 300 µm, n = 10). Receptacle flat. Disc flat, orange. Margins orange. Ectal excipulum 70–150 µm (x̄ = 80 µm, n = 10), multi-layered, thin-walled, hyaline to light yellow cells of textura porreta, small cells condense. Medullary excipulum 30–60 µm (x̄ = 55 µm, n = 10), multilayered, hyaline to light orange cells of textura intricata, small cells condense. Hymenium yellow rather to orange, inter mixed with asci and paraphyses. Paraphyses 1.5–2.5 µm wide (x̄ = 2 µm, n = 40), thin-walled, numerous, filiform, aseptate. Asci 90–110 × 5–10 µm (x̄ = 100 × 7.5 µm, n = 20), 8-spored, unitunicate, inoperculate, long cylindrical, thin-walled, tapered long stipitate base, apices blunt, amyloid ring blue in Melzer’s reagent. Ascospores 20–25 × 2–4 µm (x̄ = 22 × 3µm, n = 20), biseriate, hyaline, fusiform, pseudo-septate, thin-walled.
Fig.5 Dicephalospora chiangraiensis (MFLU MFLU 21-0018, holotype). a–b D. chiangraiensis on the stem, c Cross section of the apothecium, d Close up of the excipulum, e Margin of the apothecium, f Filiform paraphyses, g Cylindrical asci, h Apical part of asci in Melzer’s reagent, i Fusiform ascospores. Scale bars a–b = 500 µm, c = 100 µm, d = 50 µm, e–g = 20 µm, h–i = 5 µm.
