Utrechtiana arundinacea (Corda) Crous, Quaedvl. & Y. Marín, Stud. Mycol. 92: 124. 2018.
On natural substrate, conidiophores dimorphic. Macroconidiophores solitary to fasciculate, erect, straight or curved, unbranched, subcylindrical, 1-septate, medium brown, 30–50 × 9–12 μm. Macroconidiogenous cells integrated, terminal, subcylindrical, brown, smooth, 20–35 × 7–9 μm. Macroconidia solitary, obpyriform, (1–)2-septate, light brown, finely roughened, (22–)37–42(–45) × (17–)19–20(–21) μm, with a distinct dark brown hilum, 3–4 μm diam. In culture, macroconidiophores up to 6-septate, 100 μm long. Macroconidia slender, pyriform, medium brown, verrucose, 23–50 × 11–15 μm. Microconidiophores branched, subcylindrical, 3–6-septate, light brown, smooth, 15–40 × 3–6 μm. Microconidiogenous cells phialidic, terminal, lateral, fusoid-ellipsoid to ampulliform, light brown, smooth to finely roughened, 5–14 × 3–4 μm. Microconidia subcylindrical, straight to curved, aseptate, hyaline, smooth, 7–10 × 1.5–2 μm. Sexual state unknown.
Colonies on MEA, surface dirty white; reverse olivaceous grey in center, luteous in outer region. Colonies on OA, surface olivaceous grey to iron-grey (Description from Marin-Felix et al., 2019).
Typification: Ex-holotype DAOM19793 (Marin-Felix et al., 2019). Epitype CBSH-23402, MBT380884 (Marin-Felix et al., 2019). Ex-epitype culture CPC33994 (Marin-Felix et al., 2019).
Gene sequences: MG934461 (ITS), MG934468 (ACT), MG934542 (CAL), MG934473 (RPB1).
Hosts/substrates: On leaves of Phragmites (Poaceae).
Distribution: Worldwide.
Utrechtiana constantinescui (Melnik & Shabunin) Crous & Y. Marín, Stud. Mycol. 92: 126. 2018.
Asexual state pyricularia-like. On natural substrate, conidiophores solitary to fasciculate, erect, straight or curved, unbranched, subcylindrical, septate, brown, 10–15 µm diam. Conidiogenous cells integrated, terminal, cylindrical, brown, smooth, 14.3–35.6 × 6.2–8.1 µm. Conidia solitary, barrel-shaped, 2-septate, light brown, smooth, 34–48 × 17–23.4 µm, with a truncate basal hilum. (Description from Mel’nik and Shabunin, 2011).
Typification: Holotype LE210508. Isotypes D. Triebel, Microfungi Exsiccati no. 537, Mycotheca Graecensis no. 223.
Gene sequences: Unknown.
Hosts/substrates: On leaves of Phragmites australis (Poaceae).
Distribution: Russia.
Utrechtiana roumeguerei (Cavara) Videira & Crous, Stud. Mycol. 87: 412. 2017. (Type species).
Asexual state pyricularia-like. On natural substrate, hyphae branched, septate, hyaline, smooth, 2–4 µm diam. Conidiophores solitary to fasciculate, erect, straight or curved, unbranched, subcylindrical, 1-septate, dark brown, 18–45 × 10–12 µm, with a subglobose base, 10–12 × 10–15 µm. Conidiogenous cells integrated, terminal, subcylindrical, brown, finely roughened, 8–20 × 8–10 µm, with a protruding denticle, 3–5 µm diam. Conidia solitary, ellipsoidal, 1-septate, light brown, finely roughened, (25–)26–28(–30) µm long; basal cell (12–)15–17(–19) × (12–)13–15(–18) µm, apical cell (8–)10–12(–15) × 14–15(–16) µm; hilum 3–4 µm diam. Sexual state unknown (Description from Crous et al., 2011).
Typification: Unknown.
Gene sequences: MH865092 (ITS), MH876533 (28S), KM485163 (ACT), KM485232 (CAL), KM485047 (RPB1).
Hosts/substrates: On leaf spots of Phragmites (Poaceae).
Distribution: France, The Netherlands.