Allodiatrype elaeidis

Allodiatrype elaeidis

Konta, Boonmee & K.D. Hyde (2020)

Classification:Ascomycota-Pezizomycotina-Sordariomycetes-Xylariomycetidae-Xylariales-Diatrypaceae-Allodiatrype

Host species: Elaeis guineensis (Konta et al. 2020)

Holotype: MFLU 15-1439 (Konta et al. 2020)

Known distribution: Krabi, Thailand

IF Number: IF556931     Mycobank Number: 556931    FOF Number: FoF05119

Description

Saprobic on petiole of Elaeis guineensis (Arecaceae). Sexual morph – Stromata 470–860 μm long, 440–710 μm diam. (x̄ = 630 × 550 μm, n = 10), with well-developed interior, solitary to gregarious, erumpent, black, with black stromatic zone on host surface, glabrous, irregular in shape, pustulate, bi- to multi-ascomata, with umbilicate ostioles appearing on the surface of the stroma. Ostiole opening through host bark and appearing as black spots, surrounded with a ring-like structure, composed of an outer layer of dark brown, small, tightly packed, thin parenchymatous cells and an inner layer of white to light-yellow, large, loosely packed, parenchymatous cells. Ascomata (excluding necks) 250–350 μm high, 230–300 μm diam. (x̄ = 330 × 280 μm, n = 10), perithecial, immersed in the stroma, globose to subglobose, glabrous, ostioles individual, with a short neck. Ostiolar canal 100–130 μm high, 95–115 μm diam. (x̄ = 120 × 110 μm, n = 10), cylindrical, sulcate, with periphyses. Peridium 20–40 μm wide (x̄ = 30 μm, n = 50), composed of two section layers, outer part; brown to dark brown, thick-walled cells, arranged in textura angularis, inner layer; hyaline, thick-walled cells of textura angularis. Hamathecium composed of 2–7 μm wide (x̄ = 4 μm, n = 60), filiform, longer than asci, septate, branch, hyaline, paraphyses. Asci (excluding stalks), spore-bearing part (17–)20–30(−39) × 9–11(−14) μm (x̄ = 25 × 11 μm, n = 60), apically rounded, with J- apical ring, apex-bearing part (1.5–)2–3(−5) μm long (x̄ = 3 μm, n = 60), 8-spores, unitunicate, clavate, with moderately long stalks, stalk-bearing part (28–)36–65(–94) μm long (x̄ = 50 μm, n = 60). Ascospores (6–)8–10(−11) × 1.5–3) μm (x̄ = 9 × 2 μm, n = 120), overlapping, yellowish to pale-brown, ellipsoidal to cylindrical or elongate-allantoid, aseptate, smooth-walled. Asexual morph – Undetermined.

Culture conditions: Ascospores germinated on MEA within 24 hours and germ tube was produced from end cell. Colonies on MEA, white at beginning, thinner towards edge, margin diffuse, reverse coloration pale yellow.