Thallus crustose or squamulose-placodioid, sometimes verrucose- or granular-furfuraceous, effuse or lacking, attached to substrate by medullary hyphae, effigurate or lobed and subfoliose at margins, corticolous, muscicolous or saxicolous, heteromerous, yellow or yellowish-orange, or red or brown-red, occasionally blackened or greyish-white, K+ purple (anthraquinones) or K-. Photobiont green, . Apothecia lecanorine, yellow, orange, rust red, or brownish, rounded, appressed or sessile. Hypothecium colourless. Paraphyses simple, septate, capitate. Asci 8-spored. Ascospores colourless, thick-walled, polarilocular, mainly with 2 locules, one species with three locules. Pycnidia immersed. Conidia short, straight, cylindrical.