Meliolaster Höhn., Ber. dt. bot. Ges. 35: 701 (1918)
Meliolinopsis Beeli, Bull. Jard. Bot. État 7: 101 (1920)
Patouillardina G. Arnaud, C. r. hebd. Séanc. Acad. Sci., Paris 164: 890 (1917)
Epiphytes on surface of leaves, forming irregular blackened colonies. Superficial hyphae abundant on the host surface, superficial, branching, easily removed from the host, with numerous appressoria. Appressoria nearly circular to ovoid, lateral and alternative, sparsely septate. Sexual state: Thyriothecia superficial on the host, flattened, black, with basal peridium poorly developed, opening by stellate-like fissures. Upper wall circular, with irregularly arranged cells. Hamathecium lacking pseudoparaphyses. Asci 8-spored, bitunicate, globose to subglobose, apedicellate, apical region of asci usually with a thick opaque region, ocular chamber not observed, not staining blue in IKI. Ascospores fasciculate, claviform with apical cell largest, basal cell tapering, reddish- brown, septate. Asexual state: Unknown.
Notes: Patouillardina was introduced by Arnaud (1918) based on Meliola clavispora Pat. and is an earlier name for Meliolaster. Patouillardina is however, a homonym of Patouillardina Bres., in Rick, Brotéria 5: 7 (1906) (Auriculariales) and therefore cannot be used. Meliolaster established by Höhnel (1918) is therefore the earliest usable name for this genus of Asterinaceae and is also based on Meliola clavispora (1890). In Meliolaster thyriothecia have a radiating arrangement of cells, opening by star-like fissures when mature and the surrounding superficial hyphae have appressoria and are typical of Asterinaceae. The oval to oblong ascospores are however distinct and Meliolaster can be treated as a distinct genus.
Type species: Meliolaster clavisporus (Pat.) Höhn., Ber. dt. bot. Ges. 35: 701 (1918)