Xylariales » Diatrypaceae » Diatrypella

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.

 

 

Diatrypella heveae (MFLU 15-0020) (A) Stromata on host substrate. (B, C) Close up of stromata. (D) Section of stroma. (E) Ostiolar canal. (F) Peridium. (G–N) Asci. (O–U) Ascospores. (V) Colony on MEA. Bars: A = 1000 μm, B, C = 500 μm, D = 50 μm, E, F, G–N = 20 μm, O–U = 5 μm.

 

Reference

Senwanna, C; Phookamsak, R; Doilom, M; Hyde, KD; Cheewangkoon, R. 2017. Novel taxa of Diatrypaceae from Para rubber (Hevea brasiliensis) in northern Thailand; introducing a novel genus Allocryptovalsa. Mycosphere. 8(10):1835-1855

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). Mycosphere, 11(1), 239-268.

 

Recent Notes

Important News
Updated Log

Recent Genus

Thelotrema
Coniella
Sporoschisma

Recent Species

Hemicorynespora obclavata
Guignardia manokwaria
Caudatispora palmicola