Dicephalospora aurantiaca
Dicephalospora aurantiaca (W.Y. Zhuan) W.Y. Zhuang & Z.Q. Zeng
Facesoffungi number: FoF 05902; Fig. 33
Saprobic on dead stems. Sexual morph: Apothecia 2–2.5 × 1.2–1.6 mm (x = 2.30 × 1.43 mm, n = 10), arising singly or in small groups, superficial, stipitate, yellow to orange when fresh. Receptacle cupulate, disc concave and yellow to orange, margins yellow to orange, smooth. Stipe light yellow, central, medium to long in length. Ectal excipulum 20–25 µm (x = 22.9 µm, n = 10) wide at lower flanks, composed of yellow cells of textura prismatica. Medullary excipulum 28–32 µm (x = 30 µm, n = 10) wide at lower flanks, comprising hyaline cells of textura epidomoidea. Hymenium yellow. Paraphyses 2.6–1.8 µm wide (x = 2.8 µm, n = 20), numerous, filiform, septate, apices are slightly swollen, exceed the asci in length. Asci 90–120× 7.9–8.9 µm (x = 96.1 × 8.4 µm, n = 30), 8-spored, unitunicate, cylindrical, apex obtusely conical, inoperculate, non-amyloid, short-stipitate, arising from croziers. Ascospores 23.3–27.2 × 3.1–4.2 µm (x = 25.4 × 3.6 µm, n = 40), uniseriate, hyaline, smooth, aseptate, but containing row of large guttules, fusiform, often slightly curved. Asexual morph: Undetermined.
Material examined – Thailand, Chiang Mai Province, Mushroom Research Center, on dead stems, 19 July 2015, A.H. Ekanayaka, HD030n, HD30a (MFLU 16-0591). GenBank accessions – MFLU 16-0591b: ITS- MK584958, SSU- MK585038, TEFMK714024, RPB2- MK614722; MFLU 16-0591a: LSU- MK591988, ITS- MK584962
Notes – Our collections of HD030n and HD030a grouped with a Chinese collection of Dicephalospora aurantiaca (HMAS 61850) with strong statistical support of 100% (Fig. 26). For D. aurantiaca, only ITS data available in GenBank and it is 94% (307/326-94% with 2 gaps) similar to ITS data of our collections. The LSU data of our species is 98% similar to that of D. rufocornea (TNS:F-40024) (930/949-98% with 8 gaps). Dicephalospora aurantiaca is characterized by having bright yellow apothecia, non-amyloid cylindric-clavate asci and aseptate, fusoid ascospores. Morphology of our collection is similar to the description of D. aurantiaca by Zhuang & Liu (2007).
Figure 33 – Morphology of Dicephalospora aurantiaca (MFLU 16-0591) a Substrate. b Apothecia on wood. c Apothecium on wood. d Cross section of an apothecium. e Close up of the cross section of apothecium at margins. f Filiform paraphyses. g Bunch of asci and paraphyses. h–j Cylindric clavate asci. k Apex of the asci. l–n Fusiform ascospores. Scale bars: b = 200 µm, c = 500 µm, d–e = 200 µm, f = 150 µm, g = 100 µm, h–j = 40 µm, k = 20 µm, l–n = 10 µm.
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