Arctoparmelia separata

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.

Arctoparmelia separata
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Lecanorales
Family: Parmeliaceae
Genus: Arctoparmelia
Species:
A. separata
Binomial name
Arctoparmelia separata
(Th.Fr.) Hale (1974)
Synonyms
  • Parmelia separata Th.Fr. (1879)
  • Xanthoparmelia separata (Th.Fr.) Hale (1974)

Taxonomy

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]

Description

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]

References
  1. "Standardized Common Names for Wild Species in Canada". National General Status Working Group. 2020.
  2. Fries, Theodor M. (1879). "On the lichens collected during the English Polar Expedition of 1875–76". Botanical Journal of the Linnean Society. 17 (102): 353. doi:10.1111/j.1095-8339.1879.tb00444.x.
  3. Hale, M.E. (1974). "Bulbothrix, Parmelina, Relicina and Xanthoparmelia, four new genera in the Parmeliaceae". Phytologia. 28 (5): 479–490.
  4. Hale, Mason E. (1986). "Arctoparmelia, a new lichen genus in the Parmeliaceae". Mycotaxon. 25 (1): 251–254.
  5. Brodo, Irwin M.; Sharnoff, Sylvia Duran; Sharnoff, Stephen (2001). Lichens of North America. Yale University Press. p. 147. ISBN 978-0300082494.
  6. Hansen, Eric S. (2000). "A contribution to the lichen flora of the Kangerlussuaq area, West Greenland". Cryptogamie, Mycologie. 21 (1): 53–59. doi:10.1016/S0181-1584(00)00104-4.
  7. Vitikainen, O.; Dudoreva, T. (2003). "Arctoparmelia subcentrifuga new to Europe". Graphis Scripta. 14.
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