Macgarvieomyces borealis

Macgarvieomyces borealis (de Hoog & Oorschot) Klaubauf, M.-H. Lebrun & Crous, Stud. Mycol. 79: 107 (2014).
MycoBank: MB810208.
        ≡ Pyricularia borealis de Hoog & Oorschot [as ‘boreale‘], Stud. Mycol. 26: 114 (1985).

Asexual state pyricularia-like. On agar, conidiophores scattered, 1–3-septate, pale olivaceous-brown, 30–70 μm long, tapering towards apex, thick-walled near base, 7–9 μm diam. Conidiogenous cells apical, with flat, hyaline denticles, 2 μm diam. Conidia solitary, ellipsoidal, 1 (–2)-septate, not or slightly constricted at septum, hyaline to subhyaline,16–17(–40) × 6–9 μm, with a truncate hilum, Sexual state unknown (Description from de Hoog, 1985).

Colonies on PDA 3 cm diam after 14 days at 25 °C in dark; surface whitish to buff with honey center, irregular outline, slightly furrowed in center; reverse whitish to buff, with honey center. Colonies on MEA 3.3 cm diam after 14 days at 25 °C in dark; surface buff to rosy buff with entire edge, umbonate to conical, with somewhat velvety texture; reverse ochraceous and buff towards edge. Colonies on CMA and OA 3.5 cm diam after 14 days at 25 °C in dark; surface transparent, smooth (Description from Klaubauf et al., 2014).

Typification: Holotype IMI105288. Ex-holotype culture CBS461.65.

Gene sequences: KM009210 (18S), KM009162 (ITS), KM009150 (28S), KM485170 (ACT), KM009174 (MCM7), KM485239 (CAL), KM009186 (RPB1) KM009198 (TEF1).

Hosts/substrates: On leaf spots on Juncus effusus (Juncaceae).

Distribution: UK, Scotland.

Copyright 2022 by The American Phytopathological Society. Reproduced, by permission, from Luo, J., and Zhang, N. 2022. The Rice Blast Fungus and Allied Species: A Monograph of the Fungal Order Magnaporthales ( American Phytopathological Society, St. Paul, MN.