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Description

 Life habit: lichenicolous; Thallus: little or none; prothallus: absent; without asexual propagules; Apothecia: adnate, 0.3-1 mm in diam., lecanorine; disc: brownish orange, flat or slightly convex, epruinose; margin: persistent, flush; thalline margin absent; proper margin visible, concolorous with disc; parathecium: elongate to oval cells; exciple below hypothecium amorphous; epihymenium: golden, K+ red, C-; hymenium: hyaline, 60-75 µm tall; paraphyses: 1-2 tip cells slightly swollen, frequently branched; subhymenium hyaline; asci: cylindrical, 8-spored; ascospores: hyaline, 2 locules, ellipsoid, (10-)11-12.5(-14) x 5.5-7 µm, isthmus 1.5-3 µm, spore end wall thin; Pycnidia: not observed; Secondary metabolites: parietin, fallacinal, emodin, and teloschistin.; Substrate and ecology: on lichens over non-calcareous rocks; World distribution: Europe and North America; Sonoran distribution: Arizona, southern California, and Baja California.; Notes: Caloplaca epithallina occurs on various other lichens on non-calcareous rocks. The apothecial discs are dark red-orange and the margins are the same color as the discs in contrast to C. grimmiae that has brown margins. 

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© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

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