Crinitospora pulchra

Crinitospora pulchra B. Sutton & Alcorn, Trans. Br. mycol. Soc. 84(3): 439 (1985)

Saprobic on dead twigs of Mangifera indica . Sexual morph: undetermined. Asexual morph: Conidiomata 200–300 µm diam.,100–150 µm high, brown to black, stromatic, acervular, solitary (Fig. 94 d, e), solitary to gregarious and confluent on PDA medium (Fig. 94 c, f), semi-immersed initially, dehiscing by an irregular rupture of the overlying tissue, subglobose, unilocular, glabrous, thick-walled. Conidiomatal wall 35–60 µm wide, composed of thick-walled, hyaline to brown cells of textura angularis gradually merging with textura globulosa. Conidiophores arising from the innermost layer cells of conidiomata, reduced to conidiogenous cells or when present, hyaline, cylindrical, short, unbranched, septate. Conidiogenous cells 20–30 × 4–8 µm, hyaline, annellidic, lageniform to cylindrical, smooth-walled. Conidia 24.5–35 × 9–15 µm (x= 29 × 12.7 µm; n = 30), hyaline, ellipsoid with a rounded apex and a broadly truncate base, 1-euseptate, slightly constricted at septum, bearing appendages, with appendages 18–40µm long, mostly 5–6, occasionally 10, tubular, unbranched, filiform, divergent, flexuous, arising from an apical crest.

Material examined: Australia, Queensland, Bowen, on twigs of Mangifera indica (Anacardiaceae), I.F. Muirhead, 18 December 1980 (IMI 259110, holotype); (CBS 138014, culture ex-epitype).

Crinitospora pulchra (IMI 259110, holotype) a Herbarium specimen package. b, d–e Appearance of brown conidiomata on grass laid on top of PDA. c, f Appearance of black conidiomata on PDA. g–h Vertical section of conidiomata. i–j, m–n Conidiophores, conidiogenous cells and developing conidia. k–l, o–p Conidia. Scale bars d = 1000 µm, e = 200 µm, f = 500 µm, g–h = 100 µm, i–p = 10 µm.