Mycosphaerelloides
Mycosphaerelloides Videira & Crous, in Videira et al., Stud. Mycol. 83: 99 (2016).
Index Fungorum number: IF 816819; Facesoffungi number: FoF 08514 , 1 morphological species (Species Fungorum 2022), 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 uniseptate, 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 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. Molecular markers available for Mycosphaerelloides include ITS, LSU, Actin, BTUB, Calmodulin, GAPDH, Histone, RPB2 and TEF-1.
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