Xylariales » Diatrypaceae » Allodiatrype

Allodiatrype arengae

Allodiatrype arengae

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

 

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

 

Host species: Arenga pinnata (Konta et al. 2020)

 

Holotype: MFLU 15-1444 (Konta et al. 2020)

 

Known distribution: Phang-Nga, Thailand

 

IF Number: IF556929     Mycobank Number: 556929       FOF Number: FoF05117

 

Description

Saprobic on petiole of Arenga pinnata (Arecaceae). Sexual morph: Stromata 690940 μm long, 370935 μm wide ( = 830 × 700 μm, n = 10), with well-developed interior, solitary, superficial, black, without black stromatic, glabrous, subglobose to irregular, pustulate, 1–5-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 yellow, large, loosely packed, parenchymatous cells. Ascomata (excluding necks) 250400 μm high, 240400 μm diam. ( = 340 × 300 μm, n = 25), perithecial, immersed in the stroma, globose to subglobose, glabrous, ostioles individual, with a short neck. Ostiolar canal 100170 μm high, 70130 μm diam. ( = 130 × 100 μm, n = 20), cylindrical, sulcate, with periphyses. Peridium 1225 μm wide, ( = 20 μm, n = 40), composed of two sections, outer layer of brown to dark brown, thin-walled cells, arranged in textura angularis, inner layer of hyaline thin-walled cells of textura angularis. Hamathecium composed of 37 μm wide ( = 5 μm, n = 40), septate, hyaline paraphyses. Asci (excluding stalks), spore-bearing part (14–)20(−45) × (4–)610(−12) μm ( = 30 × 8 μm, n = 80), apically rounded, with J-apical ring, apex-bearing part (1.5–)35(−7.5) μm long ( = 4 μm, n = 40), 8-spored, unitunicate, clavate, with long stalks, (28–)3489(–103) μm long ( = 64 μm, n = 60). Ascospores (6–)710(−12) × 23 μm ( = 10 × 2 μm, n = 120), overlapping, yellowish to light-brown, ellipsoidal to cylindrical or elongate-allantoid, aseptate, smooth-walled. Asexual morph: Undetermined.

 

Culture conditions: Ascospores germinated on MEA within 24 hours. Colonies on MEA, white in beginning, dense but thinning towards the edge, margin diffuse, reverse pale yellow in the middle.

 

 

Allodiatrype arengae (MFLU 15-1444, holotype) (A) Stromata on host substrate. (B) Close up of stroma (ostiole opening surrounded with a ring-like structure). (C, D) Section of stroma. (E) Ostiolar canal. (F) Peridium. (G–J) Asci. (K–P) Ascospores. (Q) Colony on MEA. Bars: A = 500 μm, B, C = 200 μm, D, G–J = 50 μm, E, F = 20 μm, K–P = 5 μm.

 

Reference

Konta, S., Maharachchikumbura, S. S. N., Senanayake, I. C., McKenzie, E. H. C., Jeewon, R., Stadler, M., ... & Eungwanichayapant, P. D. (2020). A new genus Allodiatrype, five new species and a new host record of diatrypaceous fungi from palms (Arecaceae). Mycosphere11(1), 239-268.

 

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