Saccobolus truncatus  

Anamorph: not known.
Teleomorph: ascomata apothecia, 100-300 µm diam. and ca 100 µm high, solitary or gregarious, superficial or in small cavities, sessile, oblate or lenticular, pale yellow, smooth, the margin not differentiated. Disk convex, pale yellow, dotted with the purplish-black tips of ripe asci. Hymenium 50-80 µm thick. Hypothecium thin, of closely compacted isodiametric cells 4.5-8 µm diam. Excipulum consisting of a palisade of hyphae with hyaline subglobular cells 7- 10 x 6-8 µm in size. Interascal tissue of paraphyses 1.5-3 µm diam., slightly clavate, sometimes branched, the upper part enlarged up to 4.5 µm diam., with yellow pigment in the enlarged parts.Asci 75-100 x 16-23 µm,  clavate, gradually tapering into a rather broad base, blueing strongly in Melzer's reagent, the apex truncate, 8-spored. Spore-clusters elongate to very compact, (20-) 29-42 (-48) x (14-) 16-19 (-22) µm; the longitudinal axis becoming increasingly shorter with ripening, surrounded by a thick gelatinous envelope. Ascospores 14-17.5 x 7.5-8.5 µm, ellipsoidal to fusiform-ellipsoidal, with blunt ends, at first hyaline, then violet, finally often violet-brown, smooth or very finely punctate, sometimes with an occasional fissure in the epispore.