Mycosphaerellales » Mycosphaerellaceae


Hyalozasmidium U. Braun, C. Nakash., Videira & Crous, in Videira et al., Stud. Mycol. 87: 375 (2017).

Index Fungorum number: IF 822593; Facesoffungi number: FoF 08506, 2 morphological species (Species Fungorum 2022), 2 species with molecular data.

Associated with leaf spot. Sexual morph: Unknown. Asexual morph: Mycelium composed of sub hyaline to pale brown hyphae, smooth, branched and septate, producing large swollen propagules that occur terminally or laterally on hyphal strands. Conidiophores medium to dark brown, unbranched, smooth to verruculose, becoming constricted at septa, eventually disarticulating, with each conidiophore giving rise to a single conidium. Conidiogenous cells apical and intercalary, minor polyblastic, straight, proliferating sympodially, with conidiogenous loci unthickened or slightly thickened, located at shoulders and apex. Conidia hyaline, thick-walled, subcylindrical, with multiple transverse septa, developing irregular swellings which can form branches with obtuse ends, granular, basal cell tapering prominently towards the conidiophore (adapted from Videira et al. 2017).


Type species: Hyalozasmidium aerohyalinosporum (Crous & Summerell) Videira & Crous


Notes: Hyalozasmidium is unique and characterised by formation of propagules that detach to form loose conidia. Hyalozasmidium differs from Zasmidium in bearing hyaline conidia. Hyalozasmidium is morphologically and phylogenetically a distinct and well-defined genus in Mycosphaerellaceae. Molecular markers available for Hyalozasmidium include ITS, LSU, ACT, BTUB, Calmodulin, RPB2 and TEF-1.


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