Hypocreales » Stachybotryaceae » Koorchaloma

Koorchaloma okamurae

Koorchaloma okamurae I. Hino & Katum., Icones Fungorum Bamb. Jap.: 264 (1961)

 

Saprobic on dead culms of Sinobambusa tootsik (Poaceae). Sexual morph: undetermined. Asexual morph: Conidiomata 150–300 µm diam., or up to 900 µm diam, when confluent, 35–45 µm deep (conidiomatal dimension from Nag Raj 1993, excluding the conidial mass) yellowish to orange-yellow, stromatic, shallow-cupulate, solitary to gregarious or occasionally confluent, superficial, appearing as pulvinate, gelatinous, rounded to oval or heart-shaped in outline, setose. Conidiomatal wall composed of two types: a) basal wall of textura angularis with hyaline cells; b) excipulum well developed, of textura intricata with septate, branched, hyaline, hyphoid elements. Conidiomatal setae up to 200 µm long, 9–10 µm wide at the base, 5–7 µm wide above (conidiomatal setae dimension from Nag Raj 1993), marginal, brown to dark brown at the base, becoming paler and slightly attenuated towards the apex, cylindrical to subcylindrical, straight or slightly curved, unbranched, septate. Conidiophores hyaline, cylindrical to subcylindrical, branched, septate, formed from the innermost cells of the basal stroma. Conidiogenous cells 14–30 × 2–4 μm, hyaline, subcylindrical, with marked periclinal thickenings and flared collarettes, discrete, smooth-walled. Conidia 10–14 × 3–5.5 ( = 12 × 4.5) μm, hyaline, fusiform, obtuse at the apex, narrowed and slightly truncate at the base, aseptate, thick and smooth-walled, guttulate, bearing a funnel-shaped, mucoid appendage at each end.

 

Material examined: Japan, Kyoto Pref., Kyoto-si, Arashiyama, on dead culms of Sinobambusa tootsik (Makino) Makino (Poaceae), 27 August 1960, H. Okamura & H. Muroi (DAOM 187213, isotype).

 

 

References:

 

Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.

 

 

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