Discogloeum Petr., Ann Mycol. 21(3/4): 285 (1923)
Ascomycota, genera incertae sedis
Saprobic or parasitic on the host plant (Morgan-Jones 1971). Sexual morph: undetermined. Asexual morph: Conidiomata pale brown, acervular, solitary to gregarious or confuent, immersed to erumpent, circular, unilocular, glabrous. Ostiole absent, dehiscence by irregular splits of apical host tissue. Conidiomatal wall composed of thick-walled, pale brown to hyaline cells of textura angularis. Conidiophores formed from the inner cells of basal stroma, hyaline, cylindrical, branched and septate only at the base, smoothwalled. Conidiogenous cells hyaline, enteroblastic, phialidic, cylindrical, integrated or discrete, determinate, smoothwalled. Conidia hyaline, cylindrical to obovoid, obtuse at the apex, truncated at the base, unicellular or faintly 1–3-septate, smooth-walled (Morgan-Jones 1977; Sutton 1980).
Type species: Discogloeum veronicarum (Ces.) Petr., Ann Mycol. 21(3/4): 285 (1923)
Notes: Discogloeum was revised by Arx (1957a, 1970) and Sutton (1980), and four species were accepted namely, D. comari (Allesch.) Arx, D. concentricum (Heald & F.A. Wolf) Morgan-Jones, D. veronicae (Lib.) Petr. and D. veronicarum (Ces.) Petr. Discogloeum veronicarum is associated with leaf lesions on Veronica tournefortii (Plantaginaceae), while the ecology of other species is unclear (Sutton 1980). No sexual morph has been linked to Discogloeum species, and nomolecular data is available. To clarify the taxonomy of Discogloeum, many species will have to be recollected, and epitypifed.
Distribution: Germany (Sutton 1980).
Discogloeum veronicarum (redrawn from Sutton 1980) a Conidia. b Conidiogenous cells and developing conidia. c Vertical section of conidioma
Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.