Arctoparmelia separata | |
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Scientific classification
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Domain: | Eukaryota |
Kingdom: | Fungi |
Division: | Ascomycota |
Class: | Lecanoromycetes |
Order: | Lecanorales |
Family: | Parmeliaceae |
Genus: | Arctoparmelia |
Species: | A. separata
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Binomial name | |
Arctoparmelia separata | |
Synonyms | |
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Arctoparmelia separata, commonly known as the rippled ring lichen, [1] is a species of foliose, ring lichen in the family Parmeliaceae with a roughly circumpolar distribution.
The lichen was first described scientifically by Theodor Magnus Fries in 1879 as a species of Parmelia. [2] Mason Hale transferred it to Xanthoparmelia in 1974. [3] In 1986, Hale segregated five Xanthoparmelia species to the newly-created genus Arctoparmelia in 1986. This group of species, including X. separata, is characterized by the velvety, ivory-white to purplish colour of the lower surface of the thallus, the presence of alectoronic acid, and a geographical range restricted to arctic or boreal locations. [4] Arctoparmelia separata is commonly known as the rippled ring lichen. [5]
Arctoparmelia separata resembles the more common Arctoparmelia centrifuga, but is distinguished from that species by the dull mouse-grey colour of its lower surface, and its thicker and more rigid thallus, [5] and its long lobes that are divaricately branched. The lichen has an incompletely circumpolar distribution. It has been recorded from northern North America, [5] Greenland, [6] and Japan, and Siberia west to Novaya Zemlya. [4] It has not been recorded in continental Europe. [7]