Hyalocercosporidium Videira & Crous, in Videira et al., Stud. Mycol. 87: 339 (2017).
Associated with leaf spot. Sexual morph: Unknown. Asexual morph: Mycelium internal, composed of hyaline to pale brown hyphae. Conidiophores solitary, simple, pale to brown, straight or mildly sinuous, geniculate. Conidiogenous cells terminal and intercalary, geniculate-sinuous, determinate or proliferating sympodially, monoblastic, with conidiogenous loci slightly thickened, darkened and refractive, located on the shoulders and apex. Conidia solitary, hyaline, smooth, obovoid, long-obclavate, straight or slightly curved, base obconical truncate or short obconical truncate, apex rounded, aseptate or euseptate, hila slightly thickened, darkened and refractive (adapted from Videira et al. 2017).
Type species: Hyalocercosporidium desmodii Videira & Crous
Notes: Hyalocercosporidium is characterised by solitary, simple, pale to brown, straight or mildly sinuous conidiophores, terminal and intercalary, geniculate-sinuous conidiogenous cells and solitary, hyaline, smooth, obovoid, long-obclavate conidia. Hyalocercosporidium is morphologically and phylogenetically a distinct and well-defined genus in Mycosphaerellaceae. Molecular markers available for Hyalocercosporidium include ITS, LSU and RPB2.