In the present work, two species new to science, Bacidia subheterochroa and Bacidina terceirae, are reported among one hundred and five lichens and lichenicolous species reported from the islands Graciosa and Terceira (Azores Archipelago, Portugal). Updated phylogenetic studies of the family Ramalinaceae including these samples show that species of Bacidia are grouped in three different clades: Bacidia s. str. (type species B. rosella), Bacidina (type species Bn. phacodes), and Woessia (type species W. fusarioides). As a result, seven new combinations in the resurrected genus Woessia are here proposed. In addition, a comprehensive checklist of lichens and lichenicolous fungi of two of the islands (including locality and substrate) is provided, with five species being reported from Azores for the first time. Keywords: Macaronesia; Portugal; Ramalinaceae; taxonomy; biodiversity.