Mycosphaerellales » Mycosphaerellaceae


Fusoidiella Videira & Crous, in Videira et al., Stud. Mycol. 83: 87 (2016).

            Index Fungorum number: IF 816818; Facesoffungi number: FoF 08503, 2 morphological species (Species Fungorum 2022), 2 species with molecular data.

Pathogenic, causing small yellow to olivaceous green spots on leaves. Mycelium internal. Sexual morph: Unknown. Asexual morph: Conidiophores aggregated in dense fascicles, arising through stomata, aseptate, i.e. usually reduced to conidiogenous cells, smooth, brown, subcylindrical to clavate, straight to curved due to thickening of the wall on one side, not geniculate, one to multiple conidiogenous loci located laterally or apically, loci conspicuous, thickened and broad, areolate, darkened and refractive. Conidia solitary, smooth, light brown, thin-walled, fusiform to obclavate-fusiform, straight to somewhat curved, septate, not constricted at the septa, apex obtuse and base truncate, hilum flattened, thickened, darkened and refractive (adapted from Videira et al. 2016).


Type species: Fusoidiella depressa (Berk. & Broome) Videira & Crous


Notes: Fusoidiella is characterised by dense fascicles of conidiophores, conspicuous, thickened and broad conidiogenous cells, and obclavate-fusiform conidia. In the phylogenetic analysis of Videira et al. (2016), Fusoidiella formed a single lineage within Mycosphaerellaceae. Fusoidiella is a distinct and well-supported genus in Mycosphaerellaceae. Molecular markers available for Fusoidiella are ITS, LSU, BTUB, Calmodulin, RPB2 and TEF-1.


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