Austropleospora ochracea L.S. Dissan., J.C. Kang & K.D. Hyde, 2021

Dissanayake, Lakmali S., Wijayawardene, Nalin N., Samarakoon, Milan C., Hyde, Kevin D. & Kang, Ji-Chuan, 2021, The taxonomy and phylogeny of Austropleospora ochracea sp. nov. (Didymosphaeriaceae) from Guizhou, China, Phytotaxa 491 (3), pp. 217-229 : 223

Austropleospora ochracea L.S. Dissan., J.C. Kang & K.D. Hyde , sp. nov. ( FIGURE 2 )

Index Fungorum number: IF557841, Facesoffungi number: FoF 07933

Etymology:— The specific epithet refers to the color (yellowish brown) of the ascospores

Holotypus:— HMAS 248367

Saprobic on dead twigs. Sexual morph: Ascomata 150–230 μm high, 180–250 μm diam. (x = 190 × 200 μm, n = 10), black, scattered, solitary to gregarious, immersed under host epidermis, slightly raised, globose to subglobose, uni-loculate, short ostiole in the center with a pore-like opening. Peridium 15–20 μm wide (x = 18 μm, n = 15), of equal thickness, composed of several layers (3–5 layers), of flattened to broad, hyaline to brown cells, arranged in textura angularis to textura prismatica. Hamathecium composed of 1–2.5 μm wide (n = 30), numerous, filamentous, cellular, hyaline pseudoparaphyses. Asci 80–110 μm × 10–15 μm (x = 97 × 12 μm, n = 25), 8-spored, bitunicate, fissitunicate, cylindrical to cylindric-clavate, short pedicellate. Ascospores 10–20 μm × 5–7 μm (x = 15 × 6 μm, n = 30), overlapping uniseriate, muriform, mostly ellipsoidal, with 3 transverse septa, 0–1-longitudinal septa, initially hyaline, becoming yellowish-brown at maturity, asymmetrical, conical and narrowly rounded at the ends. Asexual morph: Undetermined.

Culture characteristics:— Colonies on PDA, reaching 2 cm diam., after 2 weeks at 20°C, medium dense, circular to slightly irregular with uneven margin, slightly raised and cottony surface, colony from above: white at the margin, whitish-grey at the center, yellow concentric lines near to center; from below: yellowish white at the margin, yellow to brown at the center; mycelium greenish-grey.

Material examined:— CHINA, Guizhou Province,Guiyang , Guizhou University,on dead twigs of an undetermined host, 5 October 2019, L.S. Dissanayake ( HMAS 248367 , holotype), ex-type living culture, KUMCC 20-0020

Known distribution:— Guizhou Province, China

Figures

FIGURE 2. Austropleospora ochracea (HMAS 248367, holotype). a, b. Ascomata on host substrate, c, d. Vertical sections of ascomata, e. Peridium, f. Pseudoparaphyses, g−j. Asci, k−n. Ascospores, o. Germinating ascospore, p. Culture on PDA from above. Scale bars: c, d = 100 µm, e = 10 µm, f = 4 µm, g−j = 20 µm, k−o = 5 µm.