Pleosporales » Pleosporaceae » Alternaria

Alternaria ethzedia

Alternaria ethzedia E.G. Simmons, Mycotaxon 25(1): 300 (1986)

Lewia ethzedia E.G. Simmons, Mycotaxon 25(1): 299 (1986)

Index Fungorum number: IF 103982; Facesofungi number: FoF 00918

            Saprobic on dead stem. Sexual morph: Ascomata 96–162 μm high × 138–226 μm diam. (x̄ = 131×193 μm, n = 10), scattered to clustered, semi-immersed to erumpent, dark brown to black, globose to subglobose, coriaceous, ostiolate. Ostiole central, papillate. Peridium 20–38 μm (x̄ = 26.8 μm, n = 10) wide, comprising 3–5 layers of light to dark brown thick-walled cells of textura angularis. Hamathecium of 1.5–3 μm wide, cellular, septate pseudoparaphyses, anastomosing between and above asci. Asci 73–90 × 11.5–13.5 μm (x̄ = 82 × 1 2.5 μm , n = 20), (4 –6 –)8-spored, bitunicate, fissitunicate, cylindrical to subcylindrical, straight or somewhat curved, with a short pedicel, apically rounded, with a minute ocular chamber. Ascospores 15.5–20 × 7–8.5 μm (x̄ = 18 × 7.8 μm, n = 30), overlapping uni to biseriate, pale brown, ellipsoid to fusoid, muriform, initially with 3 transverse septa, become 4–5 at maturity, central 4 rows with a single longitudinal septum, constricted at the central septum, slightly constricted at the other septa, smooth-walled, surrounded by a mucilaginous sheath . Asexual morph: see asexual morph description in Simmons (1986).

Material examined: ITALY, Forlì-Cesena Province, Fiumicello di Premilcuore, on dead stem of Brassica nigra (Brassicaceae), 13 January 2013, Erio Camporesi IT 1007 (MFLU 15-1411), ex-type living culture, MFLUCC 13-0404, CFTCC.

GenBank Numbers: LSU: KT281914, SSU: KT281916, ITS: KT281913, RPB2: KT281915.

Notes: Alternaria was introduced by Nees (1816) and is a ubiquitous genus that comprises saprobic, endophytic and pathogenic species, associated with a wide variety of substrates (Woudenberg et al. 2013, Ariyawansa et al. 2015). Alternaria ethzedia was introduced by Simmons (1986) and named as the sexual morph Lewia ethzedia.