Mycosphaerellales » Mycosphaerellaceae


Mycosphaerelloides Videira & Crous, in Videira, Groenewald, Braun, Shin & Crous, Stud. Mycol. 83: 99 (2016)

Index Fungorum number: IF 816819; Facesoffungi number: FoF 08514, 1 morphological species (Species Fungorum 2021), 1 species with molecular data.

Endophytic on leaf. Sexual morph: Ascomata pseudothecial, single, black, immersed, becoming erumpent, globose, apical ostiole, wall with medium brown textura angularis. Asci aparaphysate, fasciculate, bitunicate, subsessile, obovoid to narrowly ellipsoid. Ascospores, straight to fusoid-ellipsoid, hyaline, guttulate, thin-walled, with sub-obtuse ends, medianly 1-septate, widest in the middle of the apical cell. Ascospore germination from both ends, with germ tubes parallel to the long axis of the spore. Asexual morph: Mycelium consisting of smooth, branched, septate, pale to medium brown hyphae. Conidiomata fasciculate, medium brown. Conidiophores arising from mycelium or from the upper cells of a brown stroma, pale to medium brown, smooth, unbranched or branched, sub-cylindrical, straight to variously curved. Conidiogenous cells terminal or lateral, solitary, pale brown, smooth, proliferating sympodially or percurrently; conidiogenous loci inconspicuous. Conidia smooth, subcylindrical, multiseptate; hila neither thickened nor darkened-refractive (Adapted from Crous et al. 2004b).


Type species: Mycosphaerelloides madeirae (Crous & Denman) Videira & Crous


Notes: Mycosphaerelloides was introduced by Videira and Crous in Videira et al. (2016) with M. madeirae as type species. Mycosphaerelloides resembles mycosphaerella-like species but lacks ramularia-like asexual morph. Mycosphaerelloides has a unique ascospore germination pattern and cultural characters. Phylogenetically, Mycosphaerelloides is a distinct genus in Mycosphaerellaceae.


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