F. Bungartz, G. Hillmann, K. Kalb, and J. A. Elix, “Leprose and leproid lichens of the Galapagos, with a particular focus on <em>Lepraria</em> (Stereocaulaceae) and <em>Septotrapelia</em> (Pilocarpaceae)”, Phytotaxa, vol. 150, no. 1, pp. 1–28, Dec. 2013.