A species of the genus Ramalea, R. coilophylla, was recollected at the type locality and an additional large population was found in another state, Espı´rito Santo, in Brazil. This enabled a morphological study showing that the podetia arise from the margins of primary squamules. Sequencing showed the species and, because it is very similar to the type species, the genus, which was lastly cited as incertae sedis, to belong to the Ramalinaceae. A new species from the Amazon was also shown to belong to the Ramalinaceae and the new genus Appressodiscus is erected to accommodate this species, as well as a species that was recently described in the genus Ramboldia. New lichen species are Appressodiscus isidiobadius and Lecania variocolorata, and Appressodiscus badius is a new combination. Keywords: Lichen, Brazil, topotype, Lecania.