Agaricomycetes incertae sedis » Agaricomycetes incertae sedis » Pycnovellomyces

Pycnovellomyces foliicola

Pycnovellomyces foliicola R.F. Castañeda, Fungi Cubenses II: 16 (1987)

Facesoffungi number: FoF 07553


Saprobic on dead leaves of Mimusops commersonii. Sexual morph: undetermined. Asexual morph: Conidiomata 1000–1500 µm diam., 9001000 µm high, pale ochraceous or pale brown when dry, gelatinous and orange-yellow when moistened, pycnidial, solitary to gregarious, intraepidermal in origin, becoming erumpent later, rounded in outline, sessile, bearing asperate hyphae on the surface of conidiomata, globose in sectional view, slightly flattened or with a slight depression in the centre of the upper wall, unilocular, ostiole absent, but dehiscing by an irregular split in the upper wall. Conidiomatal hyphae composed of two types; a) pale brown, 300–700 × 10–50 µm, subcylindrical or irregular in shape, bulging at base, tapering towards apex, fascicular, irregularly branched, intertwined, asperate, arising from upper periphery, or occasionally in the middle hyaline, 6–30 × 3–7 µm, cylindrical or irregular in shape, bluntly rounded at apex, irregularly branched, septate, with numerous thorns on the surface, arising from upper and lateral periphery, or surface of pale brown hyphae. Conidiomatal wall composed of three types; a upper wall 30–40 µm wide, thick-walled, pale brown to hyaline cells of textura angularis lateral wall 30–60 µm wide, thick-walled, pale brown to hyaline cells of loose textura prismatica basal wall 50–90 µm wide, relatively thick-walled, pale brown to hyaline cells of textura angularis to textura porrecta in the lower layers, and gradually merging with thick-walled, hyaline textura intricata clamp-bearing hyphae near conidial hymenium. Conidiophores arising in a basal cushion, made up of fused hyphae with clamp connections, hyaline, subcylindrical, branched, septate, smooth-walled. Conidiogenous cells 10–30 × 2–3 µm, hyaline, holoblastic, cylindrical to lageniform, determinate, with marked periclinal thickenings at collarette zone. Conidia 10–17 × 1.5–3 µm ( = 13.5 × 2.3 µm; n = 30), hyaline, cylindrical with obtuse to angular ends, straight, unicellular, guttulate, thick- and smooth-walled, bearing subpolar, tubular appendages at both ends; appendages 8–13 µm long, mostly 2, occasionally 3 at the apical end, 1–2 at the basal end, filiform, flexuous, unbranched or dichotomously or trichotomously branched.


Material examined: Cuba, province of Havana, Santiago de las Vegas, on dead leaves of Mimusops commersonii (Sapotaceae), 26 April 1985, R.F. Castafieda Ruiz, (DAOM 199973, isotype).






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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