Mycosphaerellales » Mycosphaerellaceae


Paracercosporidium Videira & Crous, in Videira et al., Stud. Mycol. 87: 319 (2017).

Index Fungorum number: IF 822601; Facesoffungi number: FoF 08535, 2 morphological species (Species Fungorum 2021), 2 species with molecular data.

Phytopatogenic. Sexual morph: Unknown. Asexual morph: Mycelium internal, hyaline, smooth. Stromata small, composed of few dark brown cells, or medium in size, mainly hypophyllous, substomatal, dark brown. Conidiophores loosely fasciculate, emerging from stromata, pale to dark brown, paler towards the apex, thin- to thick-walled, cylindrical, mildly to strongly geniculate, simple or branched. Conidiogenous cells integrated, terminal or intercalary, polyblastic, proliferating sympodially, with rim-like conidiogenous loci, thickened and darkened, located at the shoulders and apex. Conidia solitary, hyaline to pale olivaceous brown, thick-walled, cylindrical to obclavate, rounded at the apex, usually tapering towards the base, sometimes swollen at the base or truncate, hila rim-like, darkened and refractive (adapted from Videira et al. 2017).


Type species: Paracercosporidium microsorum (Sacc.) U. Braun, C. Nakash., Videira & Crous


Notes: Paracercosporidium accommodates species that were previously placed in Passalora. Passalora microsora was reduced to synonym with Paracercosporidium microsorum. Paracercosporidium is unique in producing obclavate conidia. Paracercosporidium can be distinguished from other genera based on DNA sequence data. Molecular markers available for Paracercosporidium include ITS, LSU, RPB2 and TEF-1.


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