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Thyrea pachyphylla (Müll. Arg.) Henssen
Family: Lichinaceae
Thyrea pachyphylla image
Matthias Schultz  
Thallus: umbilicate, monophyllous or divided into 2-6 broadly rounded lobules (2-5 mm wide), up to 15 mm long, flat, margins downcurved surface: dull black, distinctly warty-papillose and appearing reticulate, 'papillae/warts' 0.1-0.2 mm wide, 0.1-0.15 mm high, epruinose, lacking isidia; lobules 0.5-1 mm thick Apothecia: not seen in Sonoran material, elsewhere rarely developed, small, laminal, immersed, disc punctiform, with persisting thalline margin; exciple: probably thin, hyaline asci: 8-spored ascospores: simple, hyaline, globose or broadly ellipsoid, 8-12 x 6-8 µm; walls: thin Pycnidia: laminal, immersed, globose, 0.1-0.15 mm wide conidia: ellipsoid, 2-3 x 1-1.5 µm Spot tests: all negative Secondary metabolites: none detected. Substrate and ecology: on limestone on damp, vertical rock faces and along seepage tracks; montane World distribution: SW Europe, NW Africa, SW North America Sonoran distribution: Sonora. Notes: Large thalli of Lichinella iodopulchra may be similar, however they lack the warty-papillose to reticulate upper surface texture.