Calogaya spp. #

Taxa #

Calogaya arnoldii, Calogaya decipiens, Calogaya saxicola

Organization #

Teloschistaceae

Identification #

Orange to bright yellowish orange, minutely foliose rosettes. Very similar to Rusavskia, Xanthomendoza, or Xanthoria species. Calogaya is readily separated from these by the inflated appearance of the lobes. Many specimens also have conspicuous pruina which are typically absent in the other similar genera in Alaska.

Substrate #

Saxicolous

Chemical Tests:

Calogaya arnoldii #

thallus and apothecia: K+ “purple-red”, C-, KC-, Pd- (ITALIC)

Calogaya decipiens #

thallus: K+ red, C-; medulla: I-; margin of apothecia: K+ red (CLH)

Calogaya saxicola #

thallus: K+ red, C-; medulla I-; margin of apothecia: K+ red (CLH)

Nimis P.L., 2025. ITALIC - The Information System on Italian Lichens. Version 8.0. University of Trieste, Dept. of Biology, (https://dryades.units.it/italic), accessed on 2025, 05, 06. for all. All data are released under a CC BY-SA 4.0 licence.

Photos #