Subsessila turbinata C.G. Lin & K.D. Hyde, in Lin, Dai, Bhat, Hyde, Tang & To-anun, Mycol. Progr. 16(4): 396 (2017)

Index Fungorum number: IF552503; Facesoffungi number: FoF02614

Etymology – In reference to the turbinate conidia.

Saprobic on the plant host. Asexual morph: Colonies on plant substrate effuse, pale brown (6C2), hairy, velvety. Mycelium partly superficial and partly immersed. Stroma absent. Setae numerous, erect, arising from radially lobed basal cells, straight or slightly flexuous, unbranched, 2–4-septate, thick-walled, verrucose, medium to dark brown (6C4 to 6F8), 50–280 μm long, swollen at the base and 4.5–13 μm wide, 2–7 μm wide just above the swollen base, tapering to a pointed apex. Conidiophores mostly absent and reduced to conidiogenous cells; if present, arising from basal cells of setae, simple, aseptate, subcylindrical, pale- to mid-brown (6C2 to 6C4), up to 6.5 μm long, 3–7.5 μm wide. Conidiogenous cells polyblastic, discrete, determinate, ampulliform, doliiform, hyaline, smooth, 4.5–6.5 μm (x = 5.5 μm, n = 30) long, 4–6 μm (x = 5.1 μm, n = 30) wide in the broadest part. Separating cells absent. Conidia aggregated, acrogenous, simple, dry, straight, smooth, thin-walled, turbinate to clavate, rostrate to pointed at the proximal end, broadly rounded at the distal end, hyaline, 14.5–20.5 μm (x = 17.70 μm, n = 50) long, 4.5–6.5 μm (x = 5.50 μm, n = 50) wide in the broadest part. Sexual morph: Undetermined. Culture characteristics: Conidia germinating on MEA within 12 h. Colonies on MEA effuse, greyish white (−B1) from above, greyish yellow (2B5) from below, reaching a diam. of 2–3 cm in 20 days at 25 °C.

Material examined – Thailand, Prachuap Khiri Khan, Khao Lom Muak, 11°47′3.96″–11.24″N, 99°48′49.13″–49′ 0.63″E, on an unidentified decaying leaf, 29 July 2015, Chuan-Gen Lin, KLM 8-1 (MFLU 15-3271, holotype; HKAS 96229, isotype), ex-type living culture MFLUCC 15-0831, KUMCC 16-0126.

Fig.  1 Subsessila turbinata (holotype MFLU 15-3271). a Leaf material. b, c Conidiophores on the host surface. d Conidiophores, seta and conidia. e Short conidiophores with conidiogenous cells. f, g Conidiogenous cell and conidia. h–j Conidia. k Germinating conidium. l, m Colonies on MEA culture, l from above, m from below. Scale bars: b = 500 μm, c = 200 μm, d = 50 μm, e–k = 10 μm.