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Aspicilia cingulata (Zahlbr.) Oksner
Family: Megasporaceae
[Lecanora cingulata Zahlbr.]
Aspicilia cingulata image
Thompson, J., 1997. American Arctic Lichens: The Microlichens.
Thallus gray to yellowish clay-colored, thin, the marginal 3-5 mm especially thin, continuous, smooth zonate, making a banding around thallus, the central portions becoming chinky, areolae in a somewhat radiate arrangement; cortex olivaceous, rather indistinct; hypothallus grading into thallus and not clearly separate. Apothecia immersed, usually 2 or 3 or up to 5 per areola; disk flat or concave, black, bare; margin not darkened; exciple exterior brown, I-; proper exciple not distinct; hypothecium cloudy, 1+ bluish; epihymenium olive-brown; hymenium 85-110 µm, 1+ bluish or brownish yellow; paraphyses slender, tips only slightly moniliform and 2-3 µm thick; asci clavate; spores 8, broadly ellipsoid or subglobose, 8.5-20 x 8-11 µm. Conidia cylindrical, straight or curved. 12-17 x 1 µm.

Reactions: medulla K-, C-, P-, 1-.

Contents: none reported.

This species grows on acid rocks. Although hitherto known from Novaya Zemlya and Alaska, it also occurs in the eastern Canadian Arctic, with disjunct reports from Glacier National Park. Montana. Lynge (1940) mentioned the resemblance of Lecanora culicis to this species but did not elaborate upon any differences. They seem to be environmental modifications of the same species.