As part of a comprehensive biodiversity inventory of Galapagos lichens, species in the genus Rinodina were reviewed. If most of the new species occur only in the archipelago, the degree of endemism in Galapagos Rinodina could be as high as 37%, significantly higher than the rate previously suggested for Galapagos lichens in general (8–10%). Across South America the genus Rinodina has, however, been very poorly studied. It is therefore currently not possible to assess if this rate of endemism will be confirmed in the long run. In addition to the newly described species, several are reported for the first time from Ecuador: Rinodina colobinoides occurs both in Galapagos and on the mainland; R. lepida is so far not known from continental Ecuador. Rinodina subtubulata was previously known only from its type locality in New Zealand. A key to all species and detailed descriptions to the new taxa as well as the poorly known R. subtubulata are provided.
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Vol. 119 • No. 1