Septoriella oudemansii Crous & Quaedvl., Persoonia, Mol. Phyl. Evol. Fungi 32: 281 (2014).
Saprobic on Phragmites australis (Cav.) Trin. ex Steud (Poaceae). Sexual state: Unknown. Asexual state: Conidiomata up to 250 µm diam., pycnidial, solitary, immersed, uniloculate, globose, glabrous, brown, ostiole central, with a brown, oozing, conidial cirrhus. Conidiomata walls composed of 3–4 layers, brown, arranged in textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 5–11 × 4–5 µm, ampulliform, hyaline, smooth-walled, apex with minute periclinal thickening or percurrent proliferation, lining the inner cavity. Conidia (17–)23–32(–35) × (3.5–)4(–6), solitary, subcylindrical, with obtuse ends, slightly wider in the middle, yellowish-brown, 3(–5)-septate, becoming slightly constricted at the septa with age, smooth-walled, with guttules and flared mucoid appendages at the ends (from Crous et al. 2014).