Xylographa (Fr.) Fr.
Thallus crustose or immersed. Photobiont green, genus unknown. Apothecia oval to elongate, lecideine, lirelliform when mature, arranged in parallel lines. Ascospores colourless, simple ellipsoid, 8 per ascus. Xylographa, with c. 8 species described, is placed in a family of its own, the Agyriaceae. Two species are recorded from New Zealand, both corticolous, but the genus is poorly known and collected here.
