Agaricomycetes incertae sedis » Agaricomycetes incertae sedis » Rhodesiopsis

Rhodesiopsis gelatinosa

Rhodesiopsis gelatinosa B. Sutton & R. Campb., Nova Hedwigia 30: 290 (1979) [1978]

Facesoffungi number: FoF 07579

 

Saprobic on leaves of Phormium tenax (Asphodelaceae) and Poa oliosa (Poaceae). Sexual morph: undetermined. Asexual morph: Conidiomata 400–700 µm diam., 120–200 µm high, orange-yellow, acervular, scattered to gregarious, initially immersed, becoming erumpent, circular to oval or irregular in outline, unilocular, glabrous, gelatinous, thick-walled, lacking an ostiole, but dehiscing by an irregular split in the overlying host tissue. Conidiomatal wall 10–40 µm wide, composed of thick-walled, brown to hyaline cells of textura angularis in the basal part. Conidiophores arising from the inner wall layer of basal stroma, hyaline, cylindrical to subcylindrical or irregular, branched, septate, smooth-walled, invested in mucus. Conidiogenous cells 10–20 × 3–4 μm, hyaline, enteroblastic, annellidic, clavate to subcylindrical, integrated, indeterminate, smooth-walled, with up to seven percurrent proliferations. Conidia 8–12 × 3–5 μm ( = 10 × 4 μm, n = 30), hyaline, ellipsoid to fusiform, with an obtuse or acute apex and a narrow and truncate base, unicellular, thick- and smooth-walled, guttulate, bearing an infundibuliform, flame-like or irregular, mucoid apical appendage and sometimes, a shorter and less conspicuous, mucoid, basal appendage.

 

Material examined: UK, Cornwall, Lizard, on the leaves of Phormium tenax (Asphodelaceae), B.C. Sutton, 18 April 1976 (IMI 202761C, holotype).

 

Rhodesiopsis gelatinosa (IMI 202761C, holotype) a, b Herbarium package and specimens. c–e Appearance of orange-yellow conidiomata on the host. f Vertical section of conidioma. g, h Conidiophores, conidiogenous cells and developing conidia. i–n Conidia. Scale bars: c–e = 200 µm, f = 100 µm, g–h = 10 µm, i–n = 5 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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