Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2004. Lichen Flora of the Greater Sonoran Desert Region. Vol 2.
Vegetative hyphae: brown to dark brown, torulose, with short, smooth-walled cells, 3-6.5(-7) µm in diam., strongly BCr+ bluish violet Pseudothecia: black, immersed to semi-immersed, globose to oblong, 60-90 x 40-80 µm wall: entirely brownish black, mostly 5-15 µm thick; hyphae: 3-7 µm wide and 3-7 µm long hamathecium: paraphysoids: formed by short cells, 2-6 x 1-2.5 µm periphyses: 6-10.5 x 1.5-2 µm asci: bitunicate, clavate, sessile to shortly stipitate, 28-49 x 11-15 µm, 8-spored; endoascus: BCr+ violet, with an ocular chamber ascospores: hyaline but becoming light brown when mature, 1-septate, lower cell a little longer then the upper one, not or slightly constricted at the septa, subclavate, oblong to ellipsoid, (8-)10-13(-14) x (3-)4 x 5(-5.5) µm, with rounded apices, 1-2-seriate inside of the ascus; epispore: smooth, thin-walled, BCr+ violet; inner perispore: becoming finely verrucose and outer perispore forming a thin halo, BCr- or BCr+ blue Pycnidia: globose to oblong, 20-50 x 20-25 µm, with an entirely brown wall conidiogenous cells: 4-6 x 2.5-4 µm conidia: 2-3 x 0.5-1 µm. Hosts: on the apothecial disc of Lecanora cenisia var. atrynea and L. swartzii; in Arizona on L. swartzii World distribution: Europe and North America (U.S.A.) Sonoran distribution: collected once in Arizona.