Thallus heteromerous, crustose to ± squamulose, microphylline or effuse, with or without a pale or dark marginal prothallus. Photobiont green ? . Apothecia sessile, rounded or ± irregular, lecideine, excipulum well developed of para- or prosoplectenchymatous tissue. Paraphyses simple or branched. Ascus thick-walled, 8-spored. Ascospores long, filiform, acicular to ellipsoid, straight or curved, 2- or more septate, thin-walled, colourless. Pycnidia sessile, ± globose to urceolate. Conidiophores simple with apically formed conidia. Conidia simple or septate, filiform to ellipsoid or oblong, bacillar or acicular.