Aposphaeria pulviscula (Sacc.) Sacc., Michelia 2(6): 4 (1880)
Saprobic on the host plant in terrestrial habitat. Sexual morph: undetermined. Asexual morph: Conidiomata (30−)54–100 μm diam., (56−)84–133 μm high, brown, pycnidial, solitary to gregarious, semi-immersed to superficial, globose to subglobose, unilocular, glabrous, ostiolate. Ostiole circular, centrally located. Conidiomatal wall 9–13 μm wide, composed of thick-walled, dark brown to brown cells of textura angularis. Conidiophores 1–4 μm wide, arising from the inner cavity of the conidiomata, hyaline, cylindrical, branched at the base, septate, smooth-walled. Conidiogenous cells hyaline, enteroblastic, phialidic, cylindrical, integrated or discrete, determinate, smooth-walled, with terminal or lateral apertures. Conidia 2.3–2.8 × 0.8–1.4 μm (mean = 2.5 × 1.2 μm, n=10), hyaline, cylindrical to ellipsoidal, unicellular, smooth, guttulate (Tian et al. 2015).
Material examined: Italy, Padova, on bare wood of Salix udensis (Salicaceae), January 1878, Saccardo (IMI 202557, isotype).
Aposphaeria pulviscula (IMI 202557, isotype) a Herbarium specimen package. b, c Vertical sections of conidiomata. d, e Sections of peridium. f, g Conidiogenous cells and conidia. Scale bars b–c = 50 µm, d = 25 µm, e = 20 µm, f–g = 5 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.