Diaporthales » Cytosporaceae » Cytospora

Cytospora pingbianensis

Cytospora pingbianensis

Q.J. Shang, K.D. Hyde & J.K. Liu, Mycosphere 11(1): 189–224 (2020)

 

Classification: Ascomycota-Pezizomycotina-Sordariomycetes-Diaporthales-Cytosporaceae-Cytospora

 

Host species: Phoenix canariensis (Xiong et al. 2025)

 

Known distribution: China (Xiong et al. 2025)

 

IF Number: IF555514      Mycobank Number: 555514     FOF Number: FoF 05107

 

Description

Saprobic on dead petiole of Phoenix canariensis. Asexual morph: Coelomycetous. Conidiomata 620–950 × 350–510 μm (x̅ = 793 × 431 μm, n = 10), stromatic, torsellioid, scattered, or sometimes in small groups, erumpent through the surface of bark, black, flat to discoid, multiple locules with separate walls and a single shared ostiole. Conceptacle absent. Ostioles converge to a shared single ostiole. Locules 120–310 × 60–100 μm (x̅ = 200 × 98 μm, n = 25), numerous, subdivided frequently, independent walls composed by textura angularis cells, subglobose or obpyriform shape. Conidiophores 4–6 ×1–2 μm (x̅ = 4.9 ×1.6 μm, n = 25), borne along the locules, hyaline, branched at the base, in the middle or occasionally unbranched, embedded in a gelatinous layer. Conidiogenous cell 7–9.5 × 1.5–2 μm (x̅ = 7.6 × 1.7 μm, n = 25), enteroblastic, phialidic, hyaline, smooth. Conidia 3–4.5 × 1–1.5 μm (x̅ = 3.8 × 1.3 μm, n = 25), hyaline, longate-allantoid, aseptate, thin-walled. Asexual morph: Not observed.

 

Culture conditions: Colonies on PDA after 2 weeks reaching 2–3 cm diam. at 25 °C, circular, flat, with entire edge, above brown in the middle and cream in the outer, yellowish in reverse.

Cytospora pingbianensis (MHZU 24-0449, new host record). a, b Colonies on natural substrate. c, d Conidiophores and conidia. e, f Conidiogenous cells with conidia. g Conidia. h The front of culture on PDA at 25℃ and the reverse of culture on PDA at 25℃. Scale bars: c, d = 20 µm; e–g = 10 µm.

 

Reference

Xiong, Y. R., Lu, L., Mapook, A., Maharachchikumbura, S. S. N., McKenzie, E. H. C., Kevin, D. H., Manawasinghe, I. S. (2025) Fungal Safari on Palm Trees: New Discoveries from East Asia and 1990-2025 Years of Global Records [Manuscript preparation]. Fungal Diversity.

 

 

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