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Harpidium gavilaniae Amo, Pérez-Ortega & A. Crespo
Nomenclature
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Family: LichinaceaeGenus: Harpidium
SUMMARY
Mycobank MB 517780
Thallus crustose, effigurated. Thallus rounded to ellipsoid, up to 2.5 cm in diam. Areoles independent, flat to bullate or sub-stipitate, affixed to substrate over most of lower surface; marginal zone usually free, maroon-purplish to copper-red. Peripheral areoles enlongated, forming lobes, 0.4–0.9(–1.23) mm in diam. Central areoles rounded, bearing immersed apothecia, 0.3–0.6(–0.8) mm in diam (n = 35). Areoles stratified in section, 0.2–0.4(–0.67) mm high. Upper cortex paraplectenchymatous, to 25 µm high; Photobiont layer continuous, 90–200 µm high; Photobiont chlorococcoid, Trebouxia-like, 6–15 µm in diam. Apothecia irregularly rounded, usually one per areole, immersed as in typical Aspicilia species, disc blackish, 0.1–0.3(–0.4) mm in diam. Thalline exciple up to 20 µm thick. Epihymenium reddish, K–, ca. 10 µm thick; hymenium 50–70 µm high; KI+ blue, paraphyses, moniliform, 4–6 µm wide, slightly wider at the apex. Asci unitunicate-rostrate, clavate, 8-spored, 24–27 x 11–14 µm (n = 30), ascus wall thick,. Ascospores hyaline, simple, crescent form with the two apices rotated 90º, 9–13 × 6–7 µm (n = 35), with thick wall (ca. 0.8 µm). Pycnidia frequent, laminal, immersed; 70–120 µm in diam. Conidia cylindrical to ellipsoidal, 3 x 1 µm. Secondary chemistry: no secondary metabolites detected by TLC.