Based on morphological, chemical and molecular data, a new species, Platygramme guizhouensis is described to science, and Phaeographis decipiens is reported as new record to China. Platygramme guizhouensis features lirelliform apothecia with discs open, black, epruinose, proper exciple apically carbonized, wedge-shaped. Asci cylindrical to clavate, 8-spored. Ascospores brown, elongate-ellipsoid, 9–12 transverse septa, I+ violet-purple. Detailed descriptions and illustrations of the new species and the new record are provided. Key words: Lichenized fungi, Graphidales, Morphology, Phylogeny, Taxonomy.