In the present paper, 15 lichenized fungal species belonging to family Graphidaceae are described, of which Ocellularia albomaculata, O. ascidioidea, O. kanneliyensis, O. monosporoides, O. pertusariiformis and O. rhicnopora are new records to Indian lichen biota and Pallidogramme chrysenteron is new to Peninsular India, whereas Asteristion alboolivaceum, Chapsa hiata, Diploschistes rampoddensis, Fissurina rubiginosa, Pseudochapsa phlyctidioides, Thelotrema canarense, T. piluliferum and T. subtile are new to lichen biota of Kerala state. Keywords – Ascomycota – Biodiversity – Taxonomy.