Helotiales » Lachnaceae » Erioscyphella

Erioscyphella fusiforme

Erioscyphella fusiforme Ekanayaka & K.D. Hyde
= Lachnum fusiforme Ekanayaka & K.D. Hyde
Facesoffungi number: FoF 00970; Fig. 37
Saprobic on dead stems. Sexual morph: Apothecia 435–440 × 378–382 µm (x = 437 × 380 µm, n = 10), arising singly or in small groups, superficial, stipitate, white when fresh, covered with long, white hairs. Receptacle cupulate, disc concave, whitish to light yellow, margins white. Hairs 70–90 × 3–4 µm (79.4 × 3.5 µm, n = 30), on flanks and stipe, cylindrical or tapered to a blunt hemispherical tip, straight, thin-walled, septate, white, densely covered with colorless granules, occasionally tips are covered with a yellow to white resinous-appearing substance. Ectal excipulum 32–37 µm wide (x = 35.5 µm, n = 10), composed of hyaline cells of textura prismatica. Medullary excipulum 48–52 µm wide (x = 51.1 µm, n = 10), comprising hyaline cells of textura intricata. Hymenium hyaline. Paraphyses 1.5–2 µm wide (x = 1.7 µm, n = 20), numerous, filiform, septate. Asci 47–52 × 4–4.5 µm (x = 49.4 × 4.2 µm, n = 30), 8-spored, unitunicate, cylindrical, inoperculate, short stipitate base, amyloid, croziers absent. Ascospores 18–25 × 1.5–2 µm (x = 21.9 × 1.6 µm, n = 40), biseriate, fusiform with sharp tips, hyaline, aseptate, smooth-walled, lacking sheath or appendages, with refractive inclusions. Asexual morph: Undetermined.
Material examined – China, Yunnan Province, Xishuangbanna, Jinghong, China, 9 June 2018, Zeng Ming, HC37 (MFLU 18-1824, HKAS102125).
GenBank accessions – LSU- MK591975, ITS- MK584948, RPB2- MK614728
Notes – Our new collection from China grouped with Erioscyphella fusiforme from Thailand with strong statistical support of 100% (Fig. 35). The ITS data of our collection shows 99% similarity to the type collection of E. fusiforme (MFLU 15-0230) (524/526-99% with 2 gaps).

Figure 37 – Morphology of Erioscyphella fusiforme (MFLU 18-1824) a Apothecia on wood. b, c Apothecium on wood. d Cross section of an apothecium. e Cylindrical hairs. f Close up of the excipulum. g–j Short pedicellate asci. k Apex of the asci with the plug blueing in Melzer’s reagent. l Septate paraphyses. m–p Filiform ascospores. Scale bars: b, d = 200 µm, e = 50 µm, f = 30 µm, g–j = 15 µm, k = 30 µm, l–p = 5 µm.

 

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