Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2007. Lichen Flora of the Greater Sonoran Desert Region. Vol 3.
Apothecia: arising in groups, initially deeply immersed and visible through linear or irregular fissures which they form in the host cortex, later erumpent, the hymenium becoming sometimes slightly raised over the host thallus, roundish or irregular in form, often confluent; disc: brown to black, lighter brown when wet, slightly concave to slightly convex, without any visible margin, 70-120 µm in diam. exciple: thin, laterally 15-20 µm thick, not raised over the hymenium, without hairs, prosenchymatic, composed of ±parallel, branched hyphae immersed in a hyaline gel, at the base indistinctly prolonged in a hyaline stipe, in the upper, exposed part brown, below paler, brownish or hyaline, pigment K-, N-; subhymenium: hyaline, c. 5 µm epihymenium: brownish, with the same pigment as the exciple, gelatinous hymenium: hyaline, 50-60 µm, I-, KI- paraphyses: simple, rarely branched, septate, thickened at the apex which is covered by a gelatinous coat, individual cells 9-15 x 1.5-3 µm, apically 2-4 µm thick asci: subcylindrical to clavate, unitunicate, wall apically not thickened, KI-, 8-spored, without croziers, 38-50 x 7-10 µm ascospores: uni- to biseriate, simple, ellipsoid to ovoid, homopolar, with rounded apices, straight to slightly curved, hyaline, with two large guttules (examined in K), 8-10.5(-12) x 3-4(-5) µm Conidiomata: unknown. Hosts: Roccella babingtonii (thallus and soralia), in Europe also on R. fuciformis and R. phycopsis, not visibly or poorly damaging the host World distribution: Spain and the Canary Islands (Fuerteventura) Sonoran distribution: once collected in Baja California Sur (Punta