Dinemasporium setulosa (B. Sutton) W. J. Li & K. D. Hyde, comb. nov.
≡ Diarimella setulosa B. Sutton, The Coelomycetes: 454 (1980)
Index Fungorum number: IF557166
Saprobic on decaying sliver of Bambusa sp. (Poaceae). Sexual morph: undetermined. Asexual morph: Conidiomata 300–350 µm diam., 200–300 µm high, black, stromatic, solitary to aggregated or often confluent, semi-immersed to superficial, elongate to oval or irregular in outline, pulvinate to hysteriform in surface view, unilocular, setose. Conidiomatal wall 10–40 µm wide, composed of thick-walled, pale brown cells of textura angularis at base and sides, gradually merging with thick-walled, darker cells of textura porrecta at the periphery. Conidiomatal setae composed of two types, arising from the external textura porrecta: a) 60–250 × 3–8 μm, dark brown to black, conspicuous, subcylindrical, unbranched, septate, tapered towards the apex, rigid, thick- and smooth-walled; b) 20–80 × 1–6 μm, pale brown to brown, inconspicuous, subulate, straight or curved, unbranched, without septa, smooth-walled. Conidiophores formed from the innermost layers of conidiomata, hyaline, subcylindrical, straight or curved, branched, smooth-walled. Conidiogenous cells 6–10 × 1–2.5 µm, hyaline, lageniform to subcylindrical with moderate periclinal thickenings, straight or with slightly curved apices, discrete or integrated, smooth-walled. Conidia 4–6.5 × 1–3 µm ( = 5 × 2 µm; n = 50), hyaline, allantoid to naviculate or fusiform, rounded at apex, and narrowed and truncate at base, guttulate, bearing unbranched appendages, filiform, flexuous, tubular at both ends (1–3µm long).
Material examined: India, Karnataka State, Rajajinagar, Bangalore, on decaying sliver of Bambusa sp. (Poaceae) on ground, 13 December 1970, T.R. Nag Raj (DAOM 215192).
Dinemasporium setulosa (DAOM 215192) a–c Herbarium specimen. d Appearance of black conidiomata on the host. e Vertical section of conidioma. f–h Setae. i–k Conidiophores, conidiogenous cells and developing conidia (i in 10% KOH and India ink). l–o Conidia. Scale bars d = 500 µm, e = 100 µm, f–o = 10 µm.
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.