Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2004. Lichen Flora of the Greater Sonoran Desert Region. Vol 2.
Pseudothecia: completely immersed to exposed, (0.08-)0.10-0.15(-0.20) mm in diam. ascomatal wall: brown, darker and thickened in ostiolar region, composed of several layers of tangentially elongated cells paraphysoids: absent periphyses: septate asci: broadly clavate, cylindrical, or saccate, 8-spored ascospores: medium brown, with one transverse, medial septum, not constricted at septum, ellipsoid, 8-15 x 6-9 µm; wall: finely scabrid Pycnidia: not seen. Hosts: on the thallus of muscicolous Buellia species, in the Sonoran Desert region only on Dimelaena radiata World distribution: Antarctica and North America Sonoran distribution: southern California and Baja California. Notes: Young spores often have a thick and hyaline perispore that becomes pigmented, granulose and thinner in fully mature spores.