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Caloplaca diphyodes (Nyl.) Jatta
Family: Teloschistaceae
[Lecania arctica Lynge]
Caloplaca diphyodes image
Stephen Sharnoff  
Thompson, J., 1997. American Arctic Lichens: The Microlichens.
Thallus white or blue-gray, usually with a pale hypothallus, verrucose to squamulose with convex upper surfaces. Apothecia numerous, dispersed or loosely grouped, closely adnate, 1-1.5 mm broad; margin thick, prominent in some specimens, in others the proper exciple is thin and separate from the thalloid margin, which becomes thick, crenulate, and reflexed; the apothecial cortex is of paraplectenchymatous hyphae bordered by a thin anticlinal layer which may appear spinulose, the outer layers inspersed with a violet-gray amorphous substance; disk dark brown, rough, flat; hymenium 70-80 µm; paraphyses clavate to capitate, tips to 6 µm and covered with a violet-gray substance; spores 8, often poorly developed, 12-18 X 6.5-8 µm, septum 2-3.5 µm.

This species is found on calcareous rocks, basalts, and gneisses, growing in seepage areas. It was described from Europe and the Mediterranean region, reported from Disko Island and Christians-haab regions in Greenland. Anderson (1967) reported it from Colorado, so that it should occur in the American Arctic, although no records are yet known.

Caloplaca diphyodes image
Stephen Sharnoff  
Caloplaca diphyodes image
Stephen Sharnoff  
Caloplaca diphyodes image
Caloplaca diphyodes image
Caloplaca diphyodes image
Caloplaca diphyodes image
Caloplaca diphyodes image
Caloplaca diphyodes image
Caloplaca diphyodes image
Caloplaca diphyodes image
Caloplaca diphyodes image
Caloplaca diphyodes image
Caloplaca diphyodes image
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Caloplaca diphyodes image
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Caloplaca diphyodes image
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Caloplaca diphyodes image
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Caloplaca diphyodes image
Caloplaca diphyodes image
Caloplaca diphyodes image
Caloplaca diphyodes image