Anamorph: Fusarium lateritium agg.; species concepts need more detailed investigation. Teleomorph: ascomata perithecia, 180-220 µm diam. and 200-250 µm tall [dried specimen], broadly ellipsoidal to pyriform, the ostiole distinct but not papillate, superficial, dark bluish black, smooth to ± tuberculate, sometimes with a metallic sheen. Peridium two-layered, the outer part with several layers of dark pinkish-brown ± globose cells 12-22 µm diam.and an inner layer of smaller hyaline to pale brown flattened angular cells. Asci 70-105 x 10-12 µm, cylindric-clavate with a short stalk and rounded apex, not fissitunicate, apical structures not clearly visible, 8-spored. Ascospores arranged biseriately, 15-18 (-19.5) x 5-6 (-7) µm, fusiform-ellipsoidal to ellipsoidal or somewhat clavate, ± equally 3-septate, more rarely 1- or 2-septate and then somewhat shorter, not constricted at the septa, fairly thick-walled, hyaline, smooth, without an epispore, gelatinous sheath or appendages.