Thallus: continuous, not immersed in the substrate, effuse or delimited by a thin, blackish hypothallus upper surface: whitish to greenish gray, smooth photobiont: a trentepohlioid alga Perithecia: hemispherical, black, semi-immersed in the thallus, 0.3-0.6 mm diam. perithecial wall: black, with a well differentiated involucrellum, 50-100 µm thick; lower wall: pale or colorless, continuous below the hamathecium hamathecium: branched pseudoparaphyses, anastomosing above the asci; filaments: c. 1 µm wide, not inspersed with oil droplets asci: cylindrical, c. 70-100 x 10 µm, with 8, uniseriately arranged ascospores ascospores: hyaline, ovoid, 1-septate with a slightly submedian euseptum, 13-15 x 5-6 µm, not ornamented, without a gelatinous sheath Pycnidia: two types: 100-200 µm diam. or 40-100 µm diam. conidia: respectively either subglobose to ellipsoid macroconidia, 2.3-4 x 1.8-2.7 µm or globose microconidia, 1-1.5 µm diam. Spot tests: all negative, UV- Secondary metabolites: none detected. Substrate and ecology: on bark of various woody plants World distribution: nearly cosmopolitan Sonoran distribution: SW Arizona and California, including the Channel Islands, but there not rare.