Description: Thallus crustose, episubstratic, dirty white to ochre-white, relatively thick, granulose-subsquamulose, consisting of small, contiguous (rarely scattered), angular areoles separated by thin fissures. Apothecia 0.3-0.5 mm.across, reddish brown, sessile, with an initially flat then convex (sometimes finally almost hemispherical) disc and a very thin, concolorous, soon excluded proper margin. Epithecium yellowish, granulose, K+ red, C+ red; hymenium colourless, 130-150 μm high; paraphyses rather lax, mostly simple, capitate; hyothecium colourless. Asci 8-spored, clavate, Teloschistes-type. Ascospores 1-septate, polarilocular, hyaline, 16-27(-30) x 9-13 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-; apothecia K+ red, C+ red. Chemistry: thallus without lichens substances; apothecia with chlorinated anthraquinones.
Note: A poorly-known, apparently coastal, silicicolous species. Claude Roux (in litt.) has examined the type material in MARSS: the brownish apothecia react C+ red (chlorinated anthraquinones), and the ascospores measure 16-27(-30) x 9-13 µm.