Table 2.
Overview of the main characters of genera in the Didymellaceae.
| Genera | Asexual morph |
Sexual morph |
|||
|---|---|---|---|---|---|
| Conidia | Septa | Chlamydospores | Ascospores | Septa | |
| Allophoma | ovoid, oblong, ellipsoidal to cylindrical, or slightly allantoid | aseptate | – | – | – |
| Ascochyta | ovoid, oblong, subcylindrical, ellipsoidal, cymbiform, allantoid | 0–1(–3) | unicellular or multicellular | ovoid to ellipsoidal, slightly biconic | 1 or 3 |
| Boeremia | variable in shape | 0–1(–2) | – | ellipsoidal | 1 |
| Calophoma | subglobose, subcylindrical, ellipsoidal, somewhat obclavate-fusiform | 0–1 | unicellular or multicellular | – | – |
| Didymella | ellipsoidal to subglobose, cylindrical, oblong, ovoid, sometimes allantoid | aseptate | unicellular or multicellular | ellipsoidal to cymbiform | 1 or multiseptate |
| Epicoccum | ovoid, ellipsoidal to oblong, (sub-)cylindrical; epicoccoid conidia: multicellular-phragmosporous, subglobose-pyriform | aseptate; septa being obscured by the dark verrucose wall | unicellular or multicellular | – | – |
| Heterophoma | ellipsoidal, oblong, cylindrical, reniform, or slightly allantoid | 0–1(–2) | unicellular | – | – |
| Leptosphaerulina | – | – | – | muriform, oblong, ellipsoidal to obovoid, subfusoid | 1(–6) |
| Macroventuria | – | – | – | ellipsoidal | 1 |
| Neoascochyta | fusoid to cylindrical, obclavate-ovoid to ellipsoidal | 0–1 | – | cylindrical to ovoid, ellipsoidal | 1 |
| Neodidymelliopsis | ovoid to ellipsoidal, cylindrical, allantoid | 0–1 | unicellular or multicellular | subovoid to oblong, ellipsoidal | 1(–3) |
| Nothophoma | ovoid, oblong to ellipsoidal | aseptate | – | – | – |
| Paraboeremia | ellipsoidal | aseptate | – | subcylindrical | 1 |
| Phoma | oblong to cylindrical, ellipsoidal, sometimes fusiform | aseptate | – | fusiform | 1 |
| Phomatodes | cylindrical to allantoid | aseptate | – | – | – |
| Stagonosporopsis | ellipsoidal to subglobose | 0–3 | – | ellipsoidal, fusiform or obovoid | 1 |
| Xenodidymella | ellipsoidal to allantoid, subcylindrical, oblong, pyriform | 0–1 | unicellular | obovoid to oblong, clavate, ellipsoidal | 1 |