Zygospermella insignis  

Anamorph: not known.
Teleomorph: ascomata perithecia, 500-750 µm diam. and 700-1000 µm tall, scattered, immersed. Neck conical to cylindrical, 150-390 x 135-200 µm in size, black and carbonaceous, mostly covered with straight or somewhat curved, usually tapering, pointed, one-celled, thick walled, usually verrucose, brown setae. Peridium 35-45 µm thick, membranaceous, semitransparent, yellowish to olivaceous, in the lower part usually with ± hyaline, flexuous, ramified, septate hairs. Cells in the outer layer angular, thin-walled, 5-10 µm diam., almost hyaline, forming scattered low reddish-brown, almost amorphous flattened agglomerations or crusts. Inner layer composed of flattened cells, yellowish to olivaceous brown, becoming gradually darker and carbonized in the upper part of the perithecium. Interascal tissue composed of paraphyses, longer than the asci, unbranched, filiform-ventricose, septate. Asci 360-400 x 30-48 µm, the spore-containing part almost cylindrical and with a tapering stipe ca 150 µm in length, at maturity rupturing just below the rounded, slightly umbonate apex. Apical cushion well developed, the apical ring ca 3.5 µm diam. and 1 µm thick, not blueing in iodine, 8-spored. Ascospores biseriately arranged, (46-) 50-68 x 11-17 µm, 5-9 µm diam. at the septum, at first hyaline, cylindrical and one-celled, then narrowly ellipsoidal, then a little equatorially constricted, finally transversely uniseptate at the constriction; both cells ranging from ochraceous, olivaceous to dark brown, of similar form and size, ± ellipsoidal, smooth, often separating and frequently provided with a transverse septum ca 5 µm from the main septum, with a germ pore and a gelatinous appendage at each end. Appendages of similar form, size and structure, 25-50 x 6-10 µm, tapering, round in cross section, non-fibrillate, with a narrow central canal.