Ramalina sarahae is described as new to science and considered to be closely related to the widespread R. lacera. It has a cortex without chondroid strands but differs from R. lacera in having a densely caespitose thallus of thin branches with only pseudocyphellae. The species is considered to be naturally rare, occurring in a small area of San Miguel Island in southern California, and on San Nicolas Island. Currently eight species of Ramalina are known from the Channel Islands.

data_packetThis is a zipped (.zip) folder that contains the alignments used for molecular phylogenetic analyses in this study. Specifically it includes: 1) the two-locus (ITS, nucLSU) alignment compiled by Serusiaux et al. (2010, Fungal Biology 114: 528-537) with the addition of a sequence newly generated for our study. 2) the partition file and the input phylip file used for maximum likelihood analyses in this study.