 This particular ridge was observed during May 1985 by Spjut—while he and Marin were collecting samples of lichens in search of new drugs to treat HIV—to have fog lingering around the peaks most of the day).The following year, in May 1986, a special effort was made to find a path to the ridges and peaks.In addition to "V. rigida", other rare new species of lichens were discovered, "Niebla infundibula" and "N. homaleoides", the latter was also found with "V. rigida" on Punta Cono, 15 April 1990.