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Hypotrachyna guatemalensis Elix & van den Boom
Nomenclature
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Family: ParmeliaceaeGenus: Hypotrachyna
SUMMARY
Mycobank MB 517782
Thallus foliose, 4–5 cm wide, adnate to loosely adnate, coriaceous, irregularly lobate. Lobes contiguous to sparingly imbricate, sublinear to subirregular, 1–4 mm wide, with entire to crenulate margins and subrotund apices, eciliate but with rhizines projecting beyond the margins in part. Upper surface grey-white to yellowish grey, emaculate, shiny and black-margined at the apices but dull and rugulose in the centre, lacking soredia, isidia, pustules, dactyls, and lobules. Medulla white. Lower surface black but brown at the apices, rhizines dense, richly dichotomously branched. Apothecia common, sessile to substipitate, 1–4 mm diam., disc pale brown, exciple smooth, margins thick and persistent. Ascospores broadly ellipsoid, 7–9 x 5–6 µm. Pycnidia common, black, immersed. Conidia weakly bifusiform, 6–8 x 1 µm. Secondary chemistry: atranorin (minor), chloroatranorin (minor), conhypoprotocetraric acid (major), hypoprotocetraric acid (minor), 4-O-demethylnotatic acid (trace).