Wirth, V. 2011. Notes on the recent distribution of Ramalina calicaris in Germany. — Herzogia 24: 367–369.
During the past decades, Ramalina calicaris was found in several areas in south-western Germany. In this region, the species was apparently continuously part of the lichen biota. The species had been correctly reported from south-western Germany until the 1950s, but was overlooked or misinterpreted afterwards. In 1999, R. calicaris was rediscovered under its correct name in the Suabian Alb.