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Julella lactea (A. Massal.) M. E. Barr
Family: Trypetheliaceae
[Polyblastiopsis lactea (A. Massal.) Zahlbr.]
Julella lactea image
Troy McMullin  
Thallus: continuous, immersed in the substrate upper surface: whitish, smooth dull photobiont: absent Perithecia: hemispherical, black, semi-immersed in the thallus, c. 0.4-1 mm diam. involucrellum: dark brown; exciple thin, pale brown ascomatal wall: black, absent below the hamathecium hamathecium: branched pseudoparaphyses, anastomosing above the asci; filaments: c. 1 micrometer wide, not inspersed with oil droplets asci: cylindrical to clavate, c. 70-90 x 20-23 micrometer, thick-walled, with 2-6, irregularly arranged ascospores ascospores: hyaline, long ellipsoid to clavate, densely muriform, 22-28 x 9-13 micrometer; walls: not ornamented, with a c. 2-4 micrometer wide gelatinous sheath Pycnidia: not seen Spot tests: all negative, UV negative Secondary metabolites: none detected. Substrate and ecology: on bark of various woody plants, including Euphorbia and Rhus World distribution: pantropical or possibly nearly cosmopolitan Sonoran distribution: collected several times in California (including the Channel islands), Baja California and in Sonora.