Miscell. Lichenol.: 23 (1856).

Protolog: Thallo cartilagineo pulvinato areolato, areolis fertilibus diffractis peltiformibus botryoso-verrucosis plicatis sub difformibus aterrimis, udis turgescentibus olivaceo-nigris. Apotheciis parvis orbicularis urceolato-cupularibus subexplanatis castaneo-fuscis, margine tumido cinctis. Ascis clavatis majusculis 8-sporis, paraphysibus gelatinosis filiformibus conglutinatis, obvallatis, sporidiis ovoideo-ellipticis utrinque attenuatis tetrablastiis parce diplopyreniis diaphanis diam. long 9^mm,0183 usque 0305, transv. 0^mm,0090 usque 0122.

Protolog type data: Ad saxa dolomitica Franconiae superioris D. Arnold.

Type locality: Germany, Bayern, Reg.-Bez. Oberfranken, on dolomite rocks, D. Arnold. Neotypus by Otálora Prope Eichstaedt. a. ad rupes dolomiticas (UPS)