Pleosporales » Phaeosphaeriaceae » Septoriella

Septoriella subcylindrospora

Septoriella subcylindrospora (W.J. Li, Camporesi & K.D. Hyde) Y. Marín & Crous, in Marin-Felix, Hernández-Restrepo, Iturrieta-González, García, Gené, Groenewald, Cai, Chen, Quaedvlieg, Schumacher, Taylor, Ambers, Bonthond, Edwards, Krueger-Hadfield, Luangsa-ard, Morton & Moslemi, Stud. Mycol. 94: 111 (2019)

Basionym: Allophaeosphaeria subcylindrospora W.J. Li, Camporesi & K.D. Hyde, in Ariyawansa et al., Fungal Diversity: 10.1007/s13225-015-0346-5, [74] (2015)

Index Fungorum number: IF 829709; Facesofungi number: FoF 00948

Etymology: In reference to the subcylindrical conidia.

Holotype: MFLU 15-0697.

Saprobic on dead stem of Dactylis glomerata L. (Poaceae), forming conspicuous, small, rounded, black fruiting bodies. Sexual morph: Undetermined. Asexual morph: Coelomycetous. Conidiomata 65–70 μm high, 83–93 μm diam., pycnidial, solitary, gregarious or confluent, subepidermal, immersed to semi-immersed, globose, pale brown to brown, unilocular, ostiolate. Wall of conidiomata 6–11 μm wide, composed of 4–5-layers, thin walled cells of textura angularis, with cells of outer 1–2 layers pale brown, gradually merging with inner 1–2 hyaline layers. Ostiole 5–7 μm wide, rounded, central, comprising dark brown to black cells. Conidiophores reduced to conidiogenous cells. Conidiogenous cells phialidic, subcylindrical, hyaline, arising from inner region of conidiomata. Conidia 14–22×1.6–3.7 μm (x̄ = 19×2.6 μm; n=30), fusiform to subcylindrical, with an obtuse and narrow apex, and a truncate base, pale brown, mostly 3-septate, occasionally 1-septate, not constricted at septa, thick-walled, smooth-walled.

Culture characteristics: Colonies on PDA flat, circular, with dull green margin, mouse-grey in the middle and pale mouse-grey at the center; reverse dull green.

Material examined: ITALY, Province of Trento [TN], Val di Sole, Cogolo, on dead stem of Dactylis glomerata (Poaceae), 30 June 2012, Erio Camporesi, IT-520 (MFLU 15-0697, holotype); ex-type living culture, MFLUCC 13-0380, KUMCC 15-0090; ibid. (KUN! HKAS 89500, isotype).

GenBank Numbers: LSU: KT314183, SSU: KT314185, ITS: KT314184.

Notes: Ariyawansa et al. (2015) introduces Allophaeosphaeria subcylindrospora and later Marin-Felix et al (2019) synonymized it as Septoriella subcylindrospora.