Thallus crustaceous, epi- or endosubstratic. When episubstratic the thallus is minutely granular to farinaceous. Photobiont: or . Apothecia well-stalked. Capitulum obconical, lenticular or spherical. Stalk tissue of ± sclerotized, dark brown hyphae, or hyaline. Hyphae of stalk strictly periclinally arranged. Excipulum well-developed or almost completely lacking. Mazaedium well-developed. Asci dissolving at an early stage, cylindrical to clavate. Ascospores simple, spherical, hyaline or medium brown, often with ornamentation. Chemistry: Containing tetronic acid derivatives and quinonoid pigments.