Chaetosphaeriales » Chaetosphaeriaceae » Pseudolachnella

Pseudolachnella ryukyuensis

Pseudolachnella ryukyuensis (I. Hino & Katum.) Nag Raj, Coelomycetous Anamorphs with Appendage-bearing Conidia: 729 (1993)

≡ Chaetopatella ryukyuensis I. Hino & Katum., Bull. Faculty of Agriculture, Yamaguchi University 11: 10 (1960)

Facesoffungi number: FoF 07545

 

Caulicolous and foliicolous. Sexual morph: undetermined. Asexual morph: Conidiomata 200–350 diam., 120–200 µm high, dark brown to black, cupulate, circular to oval or elongate, or irregular in outline, solitary to gregarious, superficial, conical in sectional view, unilocular, thick-walled, setose, papillate. Conidiomatal setae 100–300 µm long, up to 5 µm wide at the base, narrowing to 2–3.5 µm, dark brown below, becoming paler above, subulate to cylindrical with an acute apex, unbranched, septate, thick- and smooth-walled, arising from the basal part. Conidiomatal wall composed of thick-walled, dark brown to brown cells of textura angularis to textura intricata in the basal part of the outer layers, gradually merging with pale brown to hyaline cells towards the conidial hymenium. Conidiophores arising from innermost layer of basal wall, hyaline, subcylindrical, branched at the base, septate, thick- and smooth-walled. Conidiogenous cells 10–15 × 2.5–3 µm, hyaline, enteroblastic, phialidic, lageniform to subcylindrical, integrated, indeterminate, with marked periclinal thickenings in the collarette zone. Conidia 30–40 × 2.5–3 µm ( = 35.7 × 2.7 µm; n = 30), hyaline, subcylindrical to fusiform, with a blunt or rounded apex, and a narrow and truncate base bearing distinct hilum, straight or slightly curved at the lower half, aseptate or 3–5-septate, slightly constricted at the septa, guttulate, bearing appendages at both ends; apical appendages 4–6 µm long, 1–3, attenuated, flexuous, dichotomously branched; basal appendage 3–4 µm long, single, unbranched, excentric (measurement from Nag Raj (1993), as type specimen is not in good condition).

 

Material examined: Japan, Okinawa, Okinawa Island, Mt. Yonahadake, on dead culms and leaf-sheaths of Pleioblastus linearis (Poaceae), 26 July 1959, H. Muroi (DAOM 215569, type).

 

Pseudolachnella ryukyuensis (DAOM 215569, type) a, b Herbarium package and specimen. c–e Appearance of black conidiomata on the host. f Conidiomatal wall in slide view. g, h Conidiomatal setae. i Conidiogenous cells and developing conidia. j–m Conidia. Scale bars c = 500 µm, d–e = 200 µm, f = 50 µm, g–i = 20 µm, j–m = 10 µm.

 

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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