Diatrypella heveae

Diatrypella heveae

Senwanna, Phookamsak & K.D. Hyde (2017)

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

Host species: Brahea armata (Senwanna et al. 2017)

Paratype: MFLU 15-0020 (Konta et al. 2020)

Known distribution: Chiang Rai, Thailand

IF Number: IF553859       Mycobank Number: 553859     FOF Number: FoF05121

Description

Saprobic on petiole of Brahea armata (Arecaceae). Sexual morph: Stromata 660–2155 μm long, 285–860 μm wide (x̄ = 1430 × 500 μm, n = 11), with well-developed interior, solitary to gregarious, erumpent in the bark, black, fusiform in shape, pustulate, 1–2-ascomata. Ascomata (excluding necks) 70–300 μm high, 90–260 μm diam. (x̄ = 181 × 210 μm, n = 20), immersed in the stroma, sub globose to irregular, ostioles individual, with a short neck. Ostiolar canal 110–180 μm high, 80–140 μm diam. (x̄ = 140 × 110 μm, n = 20), cylindrical, sulcate, with periphyses. Peridium 10–35 μm wide (x̄ = 22 μm, n = 30), composed of two layers, outer layer of brown, thin-walled cells, arranged in textura angularis, inner layer of hyaline, thick-walled cells of textura angularis. Hamathecium composed of 2–5 μm wide (x̄ = 3 μm, n = 30), filiform, longer than asci, septate, hyaline paraphyses. Asci (including stalks), spore-bearing part (55–)64–90(−105) ×(12–)13–16(−18) μm (x̄ = 80 × 15 μm, n = 50), apically rounded, with J- apical ring, apex-bearing part 2–4(−6) μm long (x̄ = 3, n = 35), polysporous, unitunicate, clavate, with moderately short stalks, stalk-bearing part 24–36 μm long (x̄ = 35 μm, n = 20). Ascospores (5–)6–10(−13) × 1−2.5 μm (x̄ = 7 × 2 μm, n = 130), overlapping, yellowish to brown, ellipsoidal to cylindrical or elongate-allantoid, aseptate, smooth-walled. Asexual morph: Undetermined.

Culture conditions: Ascospores germinated on MEA within 24 hours, germ tube produced from end cell. Colonies on MEA smooth, white, dense towards the edge, margin diffuse.