Rinodina brasiliensis, a corticolous isidiate species with large Pachysporaria-type ascospores is described from south-eastern Brazil. The new species is closely related to R. dolichospora and to R. guianensis.Rinodina confinis is a synonym of R. dolichospora. Notes on the taxonomy, morphology, anatomy, chemistry and distribution of these three taxa are given. Descriptions and iconography are provided. A key to species is also included.