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Description type:Latin diagnosis 
Description:Thallus crustaceus, luteo-viridis usque ad luteo-griseus. Prothallus nigrus. Apothecia lecanorina, sessilia vel ad basin plusminusve constricta, 0.2-0.5 mm in diametro, disci luteo-albidi vel grisei, epruinosi vel pauce pruinosi. Margines apotheciorum tenue vel crassi, leaves, rari flexuosi, epruinosi, luteo-albidi vel luteo-grisei. Amphithecium lateriter 35-75 µm, basaliter 75-115 µm. Cortex distinctus, hyalinus, inspersus, lateraliter 12-25 mm, basaliter 20-50 mm, crystalla minuta continens. Parathecium indistinctum, hyalinum, 10-12 µm crassum. Epihymenium luteo-bruneum vel olivaceo-griseum, granulosum. Subhymenium hyalinum. Hypothecium indistinctum, hyalinum, 12-20 µm altum. Asci clavati vel cylindrici, octospori. Ascosporae hyalinae, ellipsoideae, 6-9 — 5-7 µm mm. Thallus et apothecia acidum usnicum continens. 
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