DAVYDOV, E. A., HIMELBRANT, D. E. & STEPANHIKOVA, 1. S. 2011. Contribution to the study of Umbilicariaceae (lichenized Ascomycota) in Russia. II. Kamchatka Peninsula. - Herzogia 24: 251-263.

Two species of Losallia and 14 of Umbilicaria with one additional variety arc reported from the Kamchatka Peninsula. or these. Lasallia pennsylvanica, Umbilicaria aprina. U. cinereorufescens, U. decussata. U. hirsuta, U. hyperborea var. radicicula and U. rigida are new for the Kamchatka Peninsula. Previous reports of Umbilicaria formosana. U. leiocarpa, U muehlenbergii, U. polyphylla, U. spodochroa and U. it, grins arc considered to be doubtful or Kamchatka. The lectotype of Gyrophora hyperborea f. sublaevigata Savicz was designated.