Mamiania fimbriata  

Anamorph: Conidiomata acervular, subcuticular, the upper wall formed of pale brown angular cells. Conidiophores absent. Conidiogenous cells formed directly from the lower wall tissue, 4-6 x 2.5-3.5 µm, ampulliform, proliferating percurrently with periclinal thickening, collarettes minute. Conidia 7.5-13.5 x 1-1.5 µm, fusiform to cylindric-acicular, straight or slightly curved, hyaline, aseptate, thin-walled, without a gelatinous sheath or appendages.
Teleomorph: stromata developing in yellow to brownish indeterminate spots on leaves, 1-3 mm diam. and 500-600 µm deep, usually lenticular, occupying the entire depth of the host leaf and forming a raised pustule on both sides, black, composed of an outer layer of dark thick-walled cells 50-100 µm thick and the interior whitish and composed of loosely arranged thinner-walled cells, containing 1 to ca 15 ascomata in a single layer. Ascomata perithecia, globose or oblate, blackish, with short to elongate and straight or curved necks developing centrally, immersed in the stroma with the necks emergent separately on the lower surface of the leaf. Peridium 25-40 µm thick, composed of 5-7 layers of slightly compressed dark cells, neck wall composed of elongate cells. Interascal tissue absent, but neck periphysate. Asci 33-38 x 8.5-11 µm, cylindrical to cylindric-clavate, with a single discernable wall layer, with a I- refractive apical ring, 8-spored, becoming detatched within the perithecial cavity. Ascospores 7.5-9 x 3.5-4 µm, cylindric-ovoid or ellipsoidal to narrowly ellipsoidal, straight or curved, sometimes inequilateral with one side straighter than the other, hyaline, smooth, biguttulate, with a submedian septum dividing the spore length in about a 4:1 ratio, without a gelatinous sheath or appendages.