Gaeumannomyces californicus Hern.-Restr. & Crous, Stud. Mycol. 83: 33 (2016).
MycoBank: MB816892.
Asexual state phialophora-like. On MEA, hyphae branched, septate, hyaline to brown, smooth, 1.5–4.5 μm diam. Conidiophores branched, verticillate. Conidiogenous cells phialidic, terminal to intercalary, solitary or grouped, cylindrical to lageniform, straight or curved, hyaline to light brown, 4.5–24 × 1.5–4 μm, with a cylindrical to conical, refractive collarette, up to 2.5 μm long, 1–2 μm wide. Conidia lunate, allantoid or fusiform, hyaline, 4–11 × 1–1.5 μm. Hyphopodia lobed, hyaline to brown, 25–32.5 × 24–30 μm. Sexual state unknown.
Colonies on PDA 8.5 cm diam after 7 days at 25 °C, flat; aerial mycelium scarce, cottony, white; submerged mycelium grey olivaceous; margin diffuse, uneven, reverse smoke grey. Colonies on MEA 8.5 cm diam after 7 days at 25 °C; aerial mycelium cottony to funiculose, white; submerged mycelium dark; margin diffuse, uneven; reverse olivaceous. Colonies on OA 8.5 cm diam after 7 days at 25 °C, aerial cottony to funiculose, white; submerged mycelium olivaceous black; margin diffuse; reverse olivaceous (Description from Hernández-Restrepo et al., 2016).
Typification: Holotype CBSH-22574. Ex-holotype culture CBS141377.
Gene sequences: KX306490 (ITS), KX306560 (28S), KX306625 (RPB1), KX306691 (TEF1).
Hosts/substrates: On Stenotaphrum secundatum (Poaceae).
Distribution: USA.
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 (https://my.apsnet.org/APSStore/Product-Detail.aspx?WebsiteKey=2661527A-8D44-496C-A730-8CFEB6239BE7&iProductCode=46826). American Phytopathological Society, St. Paul, MN.