Capillidium heterosporum (Drechsler) B. Huang & Y. Nie, comb. nov.
MycoBank number: MB 831601; Index Fungorum number: IF 831601; Facesoffungi number: FoF 06048; Figure 2.
Conidiobolus heterosporus Drechsler, Am. J. Bot. 40: 107 (1953). Basionym.
=Conidiobolus rugosus Drechsler, Am. J. Bot. 42: 437 (1955).
Specimens examined. China, Anhui Province, Plant detritus, 8 Nov 2008, C.F. Wang, RCEF 4430.
Description. Colonies on PDA at 25 °C after 3 d, white, reaching ca. 21 mm in diameter. Mycelia colourless, 5–9 μm wide. Primary conidiophores, colourless, un- branched and producing a single globose conidium with widening upwards, extending to a length of 30–245 μm into the air, 8–17 μm wide. Primary conidia forcibly dis- charged, colourless, globose to subglobose, measuring 12–37 μm in greatest length and 11–31 μm in total width, including a basal papilla 1.5–5 μm high and 5–12 μm wide. After discharging on to 2% water-agar, similar and smaller secondary conidia arise from primary conidia, 1–6 ellipsoidal secondary conidia (capilliconidia, 10–20 × 12–38 μm) arise from slender conidiophores (50–250 × 2.5–4 μm). Resting spores not observed.
Notes. The ex-type living culture is ATCC 12941 (United States, Maryland, 18 Mar 1952, Drechsler).
Figure 2. Capillidium heterosporum a colony on PDA after 3 d at 25 °C b primary conidiophores bearing primary conidia c primary conidia d, e, f ellipsoidal secondary conidia arising from slender conidiophores g, h production of secondary conidia. Scale bars: 10 mm (a); 20 μm (b, c, d, g, h); 100 μm (e, f).