Sabahriopsis eucalypti Crous & M.J. Wingf., Persoonia 34: 205 (2015)

Index Fungorum Number: IF 812448; MycoBank Number: MB 812448; Facesoffungi Number: FoF 15769

Etymology Name reflects the host genus Eucalyptus, from which the species was isolated.

On OA. Mycelium consisting of hyaline, smooth, branched, septate, 2 – 2.5 μm diam hyphae that contain hyphopodia-like structures. Conidiophores solitary, erect, subcylindrical, hyaline to pale olivaceous, straight to flexuous, 1–4-septate, 50–130 × 2–3 μm. Conidiogenous cells integrated, subcylindrical, terminal and intercalary, hyaline to pale olivaceous, 25–30 × 2–3 μm, containing several erumpent, refractive denticles, apical and basal on conidiogenous cell, 1 μm diam, 1 μm tall, rim somewhat darkened. Conidia solitary, pale brown, granular to guttulate, obovoid, straight to somewhat curved, apex subobtuse, base obconically truncate, (1–)2-septate, median cell encased in flared mucoid appendage up to 3 μm diam, apical cell appearing smooth, but median and basal cell finely verruculose, hilum with cylindrical marginal frill, 1 μm diam, 0.5–1 μm long, widest in middle of basal cell, (12–)22–26(–32) × (3.5–)4–5(–6) μm.

Culture characteristics — Colonies spreading, with sparse aerial mycelium, and feathery margins, reaching 8 mm diam after 1 mo at 25 °C. On MEA surface dirty white, reverse honey. On PDA surface and reverse dirty white. On OA surface honey.

Typus Malaysia, Sabah, on leaf spots of Eucalyptus brassiana (Myrtaceae), May 2014, M.J. Wingfield (holotype CBS H-22235, culture ex-type CPC 24957 = CBS 139906;

GenBank Accession Numbers – ITS: KR476734, LSU: KR476767.

Figure 1 – Sabahriopsis eucalypti. conidiophores and conidia; Scale bars = 10 μm.