Alloleptosphaeria shangrilana Thiyagaraja, D.S. Tennakoon & K.D. Hyde, 2021

Thiyagaraja, Vinodhini, Wanasinghe, Dhanushka N., Karunarathna, Samantha C., Tennakoon, Danushka S., Hyde, Kevin D., To-Anun, Chaiwat & Cheewangkoon, Ratchadawan, 2021, Alloleptosphaeria shangrilana sp. nov. and first report of the genus (Leptosphaeriaceae, Dothideomycetes) from China, Phytotaxa 491 (1), pp. 12-22 : 15-17

Alloleptosphaeria shangrilana Thiyagaraja, D.S. Tennakoon & K.D. Hyde , sp. nov. ( Fig. 2 )

Index Fungorum Number: IF 556952; Facesoffungi number: FoF 09478

Etymology:— The specific epithet “ shangrilana ” refers to the name of the place Shangri-La, from where the holotype was collected.

Holotype:— HKAS: 112210

Saprobic on dead wood. Sexual morph: Ascomata 460–540 µm high, 520–640 µm diam. (x̄ = 500 × 580 μm, n = 5), semi-immersed to superficial, globose to subglobose, solitary or in groups, black, smooth, easily removed from the host substrate, apically ostiolate. Ostiole papillate, dark brown to black, 100–140 µm high, 100–180 µm wide. Peridium coriaceous, dark brown to black, thinner at the base, wider at both sides, comprising two layers; outer layer 15–40 µm wide, black cells; inner layer 50–90 µm wide, dark brown, pseudoparanchymatous cells of textura angularis to globosa. Hamathecium composed of numerous, 1–2 μm wide, branched, septate pseudoparaphyses. Asci 140–180 × 10–15 µm (x̄ = 160 × 12.5 μm, n = 20), bitunicate, fissitunicate, cylindrical, apex thick-walled containing a narrow, inversely funnel-shaped, ocular chamber with a short pedicel. Ascospores 22–32 × 7–10 µm (x̄ = 27 × 8.5 μm, n = 40), 8-spored, uniseriate, partially overlapping, broadly fusiform, initially 1–3-sepatate, muriform when mature, initially hyaline, dark brown at maturity, deeply constricted at the median/primary septum, slightly constricted at the remaining septa, upper part wider than the lower, ends remaining cone-shaped, verruculose, guttulate, lacking a mucilaginous sheath. Asexual morph: undetermined.

Material examined— CHINA. Yunnan Province: Diqing Tibetan Autonomous Prefecture, Shangri-La, Jiantang , (027 o 55’ 05.8’’N, 099 o 36’ 33.4’’E, 3234m MSL), on dead wood of an unidentified dicotyledonous host, 14 September 2018, V. Thiyagaraja ( HKAS: 112210 holotype; MFLU 21-0017 isotype) .

Figures

FIGURE 2. Alloleptosphaeria shangrilana (holotype, HKAS: 112210). A, B. Ascomata on host substrate. C, D. Cross sections of ascomata. E, F. Vertical sections of ascomata. G. Peridium. H. Pseudoparaphyses. I–K.Asci. L.Ascus apex. M–U.Ascospores. Scale bars: B–D = 500 µm, E, F = 100 µm, G = 50 µm, H, L = 5 µm, I–K = 50 µm, M–U = 20 µm.