Saccobolus minimus  

Anamorph: not known.
Teleomorph: ascomata apothecia, solitary or gregarious, superficial, sessile, 100-200 µm diam., at first globular, becoming pulvinate, amber to ochraceous yellow, smooth, the margin not differentiated. Disk convex, amber to golden yellow, dotted with the almost black protruding tips of ripe asci. Hymenium 50-60 µm thick, hypothecium not clearly differentiated. Flesh thin, of subglobular cells 5-12 µm diam. Excipulum very thin, in the lower part of small subglobose cells, in the upper part consisting of a palisade of paraphysis-like hyphae. Paraphyses rarely branched, septate, filiform, 2.0-2.5 µm diam., with yellow contents especially in the upper part, not or scarcely thickened above (to ca 4 µm diam.). Asci 50-60 x 14-16 µm, cylindric-clavate, gradually tapering into a rather broad base, the apex truncate, the wall blue in Melzer's reagent, 8-spored. Spore-clusters compact, 29-33 x 12-15 µm, ellipsoidal to elongate, surrounded by a common hyaline gelatinous sheath. Ascospores arranged according to pattern I (Brummelen 1967), (10-) 11.5-13.5 (-14.5) x 5.5-6.5 (-7) µm, ellipsoidal to fusiform-ellipsoidal, often somewhat asymmetrical, at first hyaline and then pinkish-violet, finally violet or purplish-brown, very finely punctate or smooth, often with some irregular cracks, the pigment in a thin layer, to ca 0.7 µm thick.