You are here
Family: GnomoniaceaeGenus: Gnomoniopsis
Description contributed by Graham Kinsey (CABI).
Anamorph: Sporonema sp., sometimes referred to as Zythia fragariae. Conidiomata 130-350 µm diam, pycnidial, cavity sometimes convolute, yellowish brown to black, ostiolate, papillate, at first immersed in the host tissue, later erumpent. Conidiophores 10-15(-25) µm long, cylindrical, septate, hyaline, occasionally branched, arising from the cells lining the inner surface of the pycnidial cavity. Conidiogenous cells cylindrical to elongate flask-shaped, enteroblastic, phialidic. Conidia 4-7 x 1-2 µm, cylindrical with rounded ends, simple, 2-guttulate.
Teleomorph: stromata absent. Ascomata 220-300 µm diam, papillate or with a neck to 400 x 50-90 µm. Peridium 25-35 µm thick, composed of 4-6 layers of cells. Interascal tissue absent. Asci 20-35 x 3.5-8 µm, 8-spored. Ascospores 6.5-13 x 1.5-2.5 µm, cylindrical to narrowly ellipsoidal, septum dividing the length 1:1 to 2:1, larger cell uppermost in the ascus, lower cell often more tapered, without appendages, each cell usually containing 2 small guttules.
Frequently referred to a Gnomoniopsis comari (syn. Gnomonia comari), but according to Sogonov et al. (2008) this is a morphologically similar but phylogenetically distinct species that is apparently restricted to Comarum palustre (Rosaceae).