Choanatiara lunata DiCosmo & Nag Raj, in Nag Raj & DiCosmo, Can. J. Bot. 62(4): 712 (1984)
Facesoffungi number: FoF 07158
Saprobic on fallen leaves of Pinus resinosa (Pinaceae). Sexual morph: undetermined. Asexual morph: Conidiomata 200–300 µm diam., 200–300 µm high, dark brown to black, pycnidial, mostly solitary, occasionally gregarious, appearing as irregular humps in surface view, deeply immersed at beginning, then becoming partly erumpent at maturity, globose to subglobose, unilocular, thick-walled, glabrous, ostiolate. Ostiole papillate, single, circular or oval, papillate, centrally located or with a lateral sinuate neck. Conidiomatal wall 10–50 µm wide, composed of two distinct tissue layers, an outer layer of textura globulosa thick-walled cells, dark brown becoming lighter toward the interior, and an outer layer of textura angularis to textura intricata thick-walled cells, hyaline. Conidiophores arising from the innermost layers of the conidiomata, hyaline, cylindrical or irregular, branched, septate, invested in mucus. Conidiogenous cells 6–9 × 2–4 µm, hyaline, enteroblastic, phialidic, cylindrical to ampulliform or lageniform, discrete or integrated, smooth-walled. Conidia 23–27 × 2–3 µm (x = 25 × 3 µm; n = 30), hyaline, lunate to fusiform, obtuse at apex, narrow and truncate at base, aseptate, smooth-walled, bearing a funnel-shaped, apical, mucoid appendage.
Material examined: Canada, Ontario, Lambton County, Pinery Provincial Park, on fallen needles of Pinus resinosa (Pinaceae), 23 September 1979, F. DiCosmo (DAOM 173904, holotype); Ontario, Trout Creek, South of Delhi, on fallen leaves of P. resinosa, F. DiCosmo, 31 July 1980 (DAOM 215182).
Choanatiara lunata (DAOM 173904, holotype; DAOM 215182) a–d Herbarium package and specimens (d from DAOM 215182). e, f Appearance of dark brown to black conidiomata on the host. g, h Vertical sections of conidiomata (h from DAOM 215182. i, j Section of peridium. k–p Conidiophores, conidiogenous cells and developing conidia (arrows show conidiogenous cells). q–u Conidia (r-u examined by using lactophenol cotton blue and India ink, arrows show apical appendages). Scale bars e = 500 µm, f = 200 µm, g–h = 100 µm, i–j = 20 µm, k–u = 10 µm.
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