Readerielliopsidaceae Abdollahz. & Crous, fam. nov.

MycoBank number: MB 833170; Index Fungorum number: IF 833170; Facesoffungi number: FoF 15612;

Etymology: Name refers to the genus Readerielliopsis.

Mycelium superficial or immersed, hyaline to pale brown, branched, hyphae smooth, thin-walled, septate, constricted at septa, with a mucilaginous outer wall layer. Pycnidia superficial, globose to pyriform, cylindrical to flask-shaped, short to long, straight to irregular, occurring singly or in groups, medium to dark brown, if synnematous, then with a hyaline to pale brown stalk forming a long neck. Ostiole absent, or present, with or without hyphal hairs. Conidia small, hyaline, smooth, aseptate, oblong to ellipsoid or obdeltoid, or pale to medium brown, transversely euseptate, filiform, fusoid-ellipsoidal.

 

Type genus: Readerielliopsis Crous & Decock

Key to genera of Readerielliopsidaceae
1. Produce a thin superficial network of dense, dark hyphae on leaves………………………………………………………………………….. 2
– Produce hyphal mass, black, web-like colonies on leaves…………………………………………………………………………………………. 5
2. Pycnidia flask shaped or sub globose to pyriform, brown ………………………………………………………………………………………… 3
– Pycnidia irregularly cylindrical, straight or flexuous, short or long…………………………………………………………. Scolecoxyphium
3. Conidia globose to clavate, non-septate …………………………………………………………………….. ……………………. Readerielliopsis
– Conidia with septate ………………………………………………………………………………………………………………………………………… 4
4. Conidia filiform, fusoid-ellipsoidal, with up to 15-septate …………………………………………………………………….. Phaeoxyphiella
– Conidia oblong or ovoid, with 3–4 transverse septa ………………………………………………………………………………. Fumagospora
5. Ascostromata with stalks, ascospore oblong to saccate, 3-septate, hyaline …………………………………………………………. Scorias
– Ascostromata without stalks, ascospore fusoid, 3-septate with a mucilaginous sheath, hyaline …………………………. Alloscorias

Genus