Brunneofissura
Brunneofissura Marasinghe, Hongsanan & K.D. Hyde, in Marasinghe et al., Mycol. Progr. 21(1): 287 (2022).
Index Fungorum number: IF 839774; Facesoffungi number: FoF FOF 09586, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.
Colonies on the upper or lower surface of leaves. Sexual morph: Thyriothecia superficial, X-, Y-, or star-shaped, dark brown to pale brown, opening by pale brown linear fissures with free dark brown hyphae and appressoria at the margin. Upper wall composed of dark brown to pale brown cells of textura prismatica with marginal branched cells radiating from the center to the outer rim. Hamathecium comprising of hyaline, filiform, trabeculate pseudoparaphyses. Asci 8-spored, bitunicate, oblong to clavate, pedicel presence or absence, if present short and rounded, fissitunicate, dehiscence and ocular chamber not observed. Ascospores 1-septate, hyaline, ovoid to clavate, highly constricted at the septum, smooth-walled. Asexual morph: Unknown (adapted from Marasinghe et al. 2022).
Type species: Brunneofissura thailandica Marasinghe, Hongsanan & K.D. Hyde
Notes: Brunneofissura is a monotypic genus characterized by X-, Y-, or star-shaped thyriothecia, upper wall comprising of cells of textura prismatica, trabeculate pseudoparaphyses, oblong to clavate asci and 1-septate, hyaline ovoid to clavate ascospores. Brunneofissura resembles Morenoina Theiss. in having brown to black thyriothecia, opening by X- or Y-shaped or linear fissure, upper wall of linear, dark brown cells of textura prismatica arranged from the center to the outer rim. Brunneofissura is also similar to Morenoina in having oblong to cylindrical, 8-spored asci and 1-septate, hyaline ascospores. Brunneofissura differs from Morenoina in having pale brown linear fissures, free dark brown hyphae, appressoria at the margin of thyriothecia and filiform trabeculate pseudoparaphyses which are absent in Morenoina. Brunneofissura is a morphologically and phylogenetically distinct genus in Asterinaceae with high statistical support.
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