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Catillaria muscicola Lynge
Family: Catillariaceae
Catillaria muscicola image
Thompson, J., 1997. American Arctic Lichens: The Microlichens.
Thallus crustose, varnish-like, clay-colored, submembranaceous to minutely granulose-verrucose. Apothccia numerous, large, 1-1.5 mm, flat and thick-margined to becoming very convex and immarginate, in age recurved; exciple dark reddish brown, radiate, outer part palisade plectenchymatous and thick; disk minutely roughened, black, margin concolorous; hypothecium indistinct, dark reddish brown; epihymenium pale; hymenium narrow, pale bluish; 50 μm; paraphyses coherent but easily separating in KOH or HC1, slender, tips not much thickened, rarely branched; asci saccate; spores hyaline, fusiform, 1-septate, center scarcely constricted, 12-17 x 5-6 μm.

Reactions: K-, C-, P-; hypothecium and hymenium 1+ dark reddish or blackish; hypothecium HC1+ pale violet.

This species grows over moss and humus. It is known from eastern Greenland and from scattered localities in North America.