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Graphis caribica Lücking
Nomenclature
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Family: GraphidaceaeGenus: Graphis
Media
SUMMARY
Mycobank MB 517774
Thallus corticolous, up to 5 cm diam., 30–70 µm thick, continuous; surface uneven, yellowish green; prothallus absent. Thallus in section with cartilaginous upper cortex, irregular algal layer and large clusters of crystals below the algal layer. Apothecia lirelliform, flexuose, sparsely to irregularly branched, prominent, lacking thalline margin, 1–5 mm long, 0.3–0.4 mm wide, 0.2–0.3 mm high; disc concealed; proper margin thick, labia striate; thalline margin absent. Excipulum apically crenulate, apically to peripherally carbonized, 50–100 µm wide, apically black but laterally and basally pale yellow to orange-brown; hypothecium prosoplectenchymatous, 10–15 µm high, colourless to pale yellowish; hymenium 120–150 µm high, colourless, clear; epithecium granulose, 10–15 µm high, olive brown. Paraphyses unbranched; asci fusiform to clavate, 120–150 x 20–30 µm. Ascospores 8 per ascus, oblong, transversely 9–15-septate, 50–65 x 9–12 µm, 5–6 times as long as wide, colourless. Secondary chemistry: no substances detected by TLC.