Botryosphaeriales » Planistromellaceae


Mycosphaerellopsis Höhn., Annal. Mycol. 16(1/2): 157 (1918).

Index Fungorum number: IF 3345; Facesoffungi number: FoF 06263; 2 morphological species (Species Fungorum 2020), molecular data unavailable.

Biotrophic or saprotrophic on leaves. Sexual morph: Ascostromata, uniloculate, solitary, gregarious, immersed to semi-immersed, globose to subglobose, brown to dark brown. Cells of ascostromata composed of brown-walled cells arranged in a textura globulosa. Ostioles periphysate. Hamathecium lacking pseudoparaphyses at maturity. Asci 8-spored, bitunicate, fissitunicate, oblong to saccate, with a long pedicel, and an ocular chamber. Ascospores 1-3 seriate and partially overlapping, ellipsoid to broadly obovoid, broadly rounded at the apex, narrowly rounded at the base, hyaline, 1-septate, constricted at the central septum, with one guttule in each cell, slightly roughened. Asexual morph: Conidiomata pycnidial. Conidiogenous cells short, holoblastic. Conidia oblong, uniseptate, hyaline (asexual morph description follows Barr 1996).


Type species: Mycosphaerellopsis myricariae (Fuckel) Höhn.


Notes: Mycosphaerellopsis is distinct from other genera in Planistromellaceae in having uniloculate ascomata anduniseptate, broadly obovoid ascospores. Mycosphaerellopsis was tentatively included in Planistromellaceae based on morphology (Monkai et al. 2013). Wijayawardene et al. (2022) referred Mycosphaerellopsis to Botryosphaeriales genera incertae sedis. The sequencing of fresh material is required to confirm placement of this genus.


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