Pleosporales » Occultibambusaceae » Brunneofusispora

Brunneofusispora inclinatiostiola

Brunneofusispora inclinatiostiola

S.N. Zhang & Jian K. Liu Diversity 13(11): 516 (2021)

 

Classification: Ascomycota-Pezizomycotina-Dothideomycetes-Pleosporomycetidae-Pleosporales-Occultibambusaceae-Brunneofusispora

 

Host species: Trachycarpus fortunei

 

Holotype: HKAS 113022

 

Known distribution: China

 

IF Number: IF841009      Mycobank Number: 841009      FOF Number: N/A

 

Description

Saprobic on decaying petioles of Trachycarpus fortunei. Sexual morph: Ascomata are solitary, scattered to gregarious, immersed, slightly erumpent the host epidermis, visible as whitish-grey to pale brown area with a small black dot, in vertical section 90–230 μm high, 150–340 μm diam., depressed globose or irregular subglobose, uniloculate, with an immersed ostiolar neck. Ostiole are usually ecentric, brown to black and periphysate. Peridium 15–55 μm wide, sometimes up to 70 μm at the side, composed of several layers of hyaline to brown, thick-walled cells of textura angularis, darker and thicker outwardly. Hamathecium are 2.0–3.5 µm wide, cellular pseudoparaphyses, anastomosing above the asci, embedded in a gelatinous matrix. Asci 60–145× 7.5–13.5 µm ( = 100.6 × 10.3 µm, n = 20), 8-spored, bitunicate, fissitunicate, cylindrical or cylindric-clavate, straight or slightly curved, short pedicellate, rounded at the apex, with an ocular chamber. Ascospores are (13.5–)14.0–19.0(–27.0) × 4.0–6.5 µm ( = 17.4 × 4.7 µm, n = 50), uniseriate to partially biseriate, fusiform to ellipsoidal, hyaline, becoming pale brown at maturity, 1-septate, the upper cell slightly wider than the lower cell, guttulate when young, smooth-walled, surrounded by a mucilaginous sheath. Asexual morph: Undetermined.

 

 

Culture conditions: Colonies on PDA reaching 12–15 mm diam. after 21 days at 25 °C, circular, raised to umbonate, the margin entire, dark green, surface rough, dry, cottony, reverse dark green to black.

 

 

Brunneofusispora inclinatiostiola (HKAS 113022, holotype) (a–c) Ascomata on host substrate. (d–f) Vertical section of ascoma. (g–k) Asci. (l) Ostiole, showing periphyses. (m) Structure of peridium. (n) Pseudoparaphyses. (o–s) Ascospores (s) Arrow indicated mucilaginous sheath). (t) Germinated ascospore. (u,v) Colonies on PDA, above (u) and reverse (v). Scale bars: a = 1000 μm, b,c, = 500 μm, d–f = 50 μm, g, o–s = 10 μm, h–n, t = 20 μm.

 

Reference

Yu, X.D. et al. (2021) Additions to Occultibambusaceae (Pleosporales, Dothideomycetes): Unrevealing Palmicolous Fungi in China. Diversity 13:516

 

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