K. Svenska Vetensk.-Akad. Handl., ser. 3 7 (no. 4): 198 (1929).

Synonyms: Index Fungorum

Protolog: Thallus indeterminatus, squamuloso-areolatus, effusus, + obscure rufo-fuscus vel castaneus, areolae subcontiguae vel approximatae, minutae, angulosae, planae vel subconvexae, subtus pallidae. Apothecia solitaria, dua vel tria in quavis areola, punctiformia vel dilatata, impressa, obscure fusca. Cortex superior subtenuis vel mediocris, cellulis mediocribus. Hymenium subcrassum. Sporae tenuiter ellipsoideae.

Protolog type data: U.S.A. Illinois: Kane Co. 1895 FINK (hb. Mn., type-specimen).

Type locality: USA, Illinois, Kane County, on silicate rock, 1895, B. Fink s.n. (UPS - holotype; MIN, NY - isotypes).