Mycosphaerellales » Mycosphaerellaceae


Amycosphaerella Quaedvl. & Crous, in Quaedvlieg et al., Persoonia 33: 22 (2014).

Index Fungorum number: IF 807780; Facesoffungi number: FoF 08472, 2 morphological species (Species Fungorum 2022), 2 species with molecular data.

Foliicolous, plant pathogenic. Sexual morph: Ascomata pseudothecial, amphigenous, solitary, black, subepidermal, globose, with central apical ostioles, becoming papillate; walls of 2–3 layers of medium brown textura angularis, subhymenium of 1–2 layers of hyaline cells. Pseudoparaphyses not seen. Asci obovoid to broadly ellipsoidal, straight or incurved, 8-spored. Ascospores bi- to triseriate, overlapping, hyaline, guttulate, straight, fusoid-ellipsoidal with obtuse ends, widest in middle of apical cells, medianly uniseptate, tapering toward both ends, but more prominently toward base. Asexual morph: Unknown (adapted from Quaedvlieg et al. 2014).


 Type species: Amycosphaerella africana (Crous & M.J. Wingf.) Quaedvl. & Crous


Notes: Amycosphaerella is characterised by pseudothecial, amphigenous ascomata, bi- to triseriate hyaline, guttulate ascospores. Amycosphaerella resembles other Mycosphaerella species but differs in having ascospores that germinate from both cells. Amycosphaerella can be distinguished from Mycosphaerella species based on DNA sequence data. Amycosphaerella is a distinct and well-supported genus in Mycosphaerellaceae. Molecular markers available for Amycosphaerella are ITS, LSU and RPB2.


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