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Pyrenula thelomorpha Tuck.
Family: Pyrenulaceae
[Anthracothecium thelomorphum (Tuck.) Zahlbr.]
Pyrenula thelomorpha image
Thallus: continuous, superficial on the substrate, upper surface: brownish, smooth, with pseudocyphellae photobiont: a trentepohlioid alga or absent Perithecia: spherical, black, immersed in the thallus, 0.4-0.6 mm diam. ascomatal wall: black, continuous below the hamathecium hamathecium: composed of unbranched pseudoparaphyses, not anastomosing; filaments: c. 1 µm wide, not inspersed with oil droplets asci: cylindrical, with 8, irregularly arranged ascospores ascospores: blackish brown, ellipsoid, muriform, distoseptate, 30-50 x 10-15 µm; walls: not ornamented, without a gelatinous sheath Spot tests: all negative, UV negative Secondary metabolites: none detected. Substrate and ecology: on bark of various woody plants World distribution: neotropical or possibly nearly pantropical Sonoran distribution: only recorded from southern California.