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Micarea misella (Nyl.) Hedl.  
Family: Pilocarpaceae
[Biatora misella (Nyl.) H.G. Falk, moreBiatorina misella (Nyl.) M. Choisy, Lecidea anomala var. misella Nyl., Lecidea melanochroza Leight. ex Cromb., Lecidea misella Nyl., Lecidea misella f. brasiliana Vain., Lecidea misella f. deviella (Vain.) Zahlbr., Lecidea misella f. misella (Nyl.) Nyl., Lecidea misella f. olivascens (Vain.) Zahlbr.]
Micarea misella image
André Aptroot
  • Greater Sonoran Desert
  • Resources
Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2007. Lichen Flora of the Greater Sonoran Desert Region. Vol 3.
Thallus: crustose, effuse, usually immersed in the substrate, occasionally better developed convex areoles surface: white to pale gray, smooth but lacking well-defined cortex Apothecia: sessile, 0.1-0.3 mm in diam. disc: black, strongly convex, epruinose proper exciple: poorly developed, but often visible as a dark brown (K+ violet) zone, composed of very narrow (<1 µm), radiating, branched and anastomosing hyphae epihymenium: dull green and K+ violet hymenium: 25-35 µm tall; paraphyses: few, sparingly branched except near apices, <1 µm wide, not capitate although widening to c. 1.5 µm at apices; hypothecium: hyaline, 45-70 µm thick asci: clavate, 25-35 x 7-10 µm, 8-spored ascospores: hyaline, simple, ellipsoid, 7-9.5 x 2-3 µm Pycnidia: usually present, immersed (c. 40 µm in diam.) to emergent to stalked (70-320 µm tall), black conidia: composed of two types: i) mesoconidia, simple, 3.5-5 x 1.5-(1.7) µm; ii) microconidia, simple, 3.8-6 x 0.6-0.8 µm Spot tests: red ( in section), KC+ red, P- Secondary metabolite: gyrophoric acid, although sometimes in small amounts. Substrate and ecology: usually on conifer wood World distribution: probably widespread in Europe, eastern and far western North America, and also known from Brazil Sonoran distribution: known only from two collections in Arizona (Gila & Pima Cos.) on Pinus ponderosa and Juniperus deppeana. Notes: Micarea misella is similar to M. denigrata but usually with immersed thallus and simple ascospores. The microconidia occur in immersed pycnidia.
Micarea misella
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This project made possible by National Science Foundation Awards: #1115116, #2001500, #2001394
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