Lobothallia alphoplaca

Lobothallia alphoplaca (variable sunken disk lichen) is a creamy gray to brown,[2]:307 placoidioid areolate lichen that grows on rock in on rock and sometimes moss.[3] It prefers growing on siliceous rocks.[3] It is found in Europe, central Asia, and North America, where it grows in the southwestern deserts to central California.[3] The center has numerous crowded and deformed apothecia with rims of thallus-like tissue (lecanorine).[3] With dark reddish or grayish brown to black discs.[3] Lichen spot tests on the thallus and apothecia are C-, and KC-, with tests on the cortex K+ red, P+ orange, or K-, P- and on the medulla K+ red, and P+ orange.[3] It produces norstictic acid, constictic acid, or salazinic acid as secondary metabolites.[3]

Lobothallia alphoplaca
Scientific classification
Kingdom:
Fungi
Division:
Ascomycota
Class:
Ascomycetes
Order:
Pertusariales
Family:
Megasporaceae
Genus:
Lobothallia
Species:
L. alphoplaca
Binomial name
Lobothallia alphoplaca
(Wahlenb.) Hafellner (1991)
Synonyms[1]
  • Parmelia alphoplaca Wahlenb. (1803)
  • Lecanora alphoplaca (Wahlenb.) Ach. (1810)
  • Lecanora melanaspis var. alphoplaca (Wahlenb.) Th.Fr.
  • Aspicilia alphoplaca (Wahlenb.) Poelt & Leuckert (1973)
  • Paraplacodium alphoplacum (Wahlenb.) Motyka (1996)

References
  1. "Synonymy: Lobothallia alphoplaca (Wahlenb.) Hafellner". Species Fungorum. CAB International. Retrieved 2014-11-01.
  2. Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, ISBN 978-0-300-19500-2
  3. Lichen Flora of the Greater Sonoran Desert Region. Vol 2, Nash, T.H., Ryan, B.D., Gries, C., Bugartz, F., (eds.) 2001,


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