Hypoxylon elevatidiscus Y.-M. Ju, J. D. Rogers & Hsieh

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

TELEOMORPH

Hypoxylon elevatidiscus Y.-M. Ju, J. D. Rogers et Hsieh, nom. prov.

Stromata effused-pulvinate, up to 7 cm long x 2-5 cm broad x 1 mm thick, with perithecial mounds 1/3-1/4 exposed; surface dull black; dark brown to blackish granules immediately beneath surface, with KOH-extractable pigments Olivaceous (90); tissue between perithecia dark brown, woody, with carbonaceous tissue encasing each individual perithecium; tissue below perithecial layer ca. 0.5 mm thick, dark brown, woody.

Perithecia spherical, 0.4-0.5 mm diam.

Ostioles higher than stromatal surface, with ostiolar openings slightly papillate, encircled with a convex truncatum-type disc as defined in Ju and Rogers (1996), 0.2-0.3 mm diam.

Asci cylindrical, with eight ascospores arranged in uniseriate manner, 110-130 mm total length x 4.5-5 mm broad, the spore-bearing parts 65-80 mm long, the stipes 45-60 mm long, with apical ring faintly bluing at base or not bluing in Melzer¡¦s iodine reagent, discoid, 0.5 mm high x 2 mm broad.

Ascospores light brown to brown, unicellular, ellipsoid-inequilateral, with narrowly rounded ends, 8-10 x 3.5-4.5 mm, with straight germ slit spore-length on convex side; perispore dehiscent in 10% KOH, smooth, with a thickened area visible at the position of ca. 1/3 ascospore length on the same side as the germ slit; epispore smooth.