Ceratosphaeria pusilla

Figure. Ceratosphaeria pusilla (ILLS44364). A–B. Ascomata. C–D. Asci. E–G. Ascospores. Scale bars: A–B = 200 µm; C–G = 10 µm.

Ceratosphaeria pusilla (Fuckel) Sacc., Syll. fung. (Abellini) 2: 227 (1883).
MycoBank: MB241302.
        ≡ Ceratostoma pusillum Fuckel, Jb. nassau. Ver. Naturk. 23–24: 128 (1870).

Ascomata perithecial, superficial, solitary, ovoid to obpyriform, dark brown to black, 200–350 µm diam, with a black, conical to cylindrical neck, 330–450 × 60–90 µm. Paraphyses septate, hyaline. Asci 8-spored, unitunicate, cylindrical, 190–220 × 10–13 µm, with a refractive ring. Ascospores uniseriate in ascus, fusiform, 4–5-septate, slightly constricted at septum, hyaline, smooth, 25–30 × 6–9 µm. Asexual state unknown.

Typification: Unknown.

Specimens examined: USA, Illinois, Johnson, Elvira Cypress Swamp (Deer Pond), on rotten wood, 29 Nov. 1973, J.L. Crane and C.A. Shearer, 44364 (ILLS159659).

Gene sequences: Unknown.

Hosts/substrates: On rotten wood.

Distribution: Germany, Pakistan, USA (Illinois).

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.