Additional new species in Roccellaceae s.l. from the Andaman and Nicobar Islands, India

In the floristic revision on the lichens of the Andaman and Nicobar Islands three more species in the family Roccellaceae are described as new to science: Chiodecton norsticticum sp. nov., Enterographa nicobarica sp. nov. and Gyrographa nigrofusca sp. nov. Chiodecton norsticticum has 7-septate small ascospores and norstictic acid. Enterographa nicobarica has simple to branched lirelliform ascomata in pseudostromata, 5-7-septate ascospores and lacking lichen substances. Gyrographa nigrofusca has simple to substellate lirelliform ascomata, 7-septate ascospores and lacking lichen substances Chiodecton norsticticum and Enterographa nicobarica are recorded on coconut palms.