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Thelenella sychnogonioides (Zahlbr.) R. C. Harris
Family: Thelenellaceae
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Thallus: inconspicuous, superficial, partially indistinct, membranous to rimose upper surface: pale brown to gray-brown, smooth prothallus: absent Perithecia: immersed but appearing as prominent warts, dispersed; ostiole pale brown; involucrellum: absent; exciple: colorless to pale brown hamathecium: composed of persistent paraphyses, richly branched and anastomosed; periphysoids towards the inner side of the ostiole; periphyses absent asci: cylindrical, 8-spored ascospores: colorless, submuriform to rarely muriform, with 6-7 lateral septa and 1 (-2) longitudinal septa, narrowly ellipsoid, 20-30 x 7-11 ┬Ám Pycnidia: not seen Spot tests: all negative Secondary metabolites: none detected. Substrate and ecology: bark, (on smooth bark of Quercus agrifolia and Juglans californica in southern California) World distribution: southern California and temperate Australia Sonoran distribution: San Gabriel Mountains and the Santa Monica Range in southern California. Notes: Thelenella sychnogonioides is characterized by its inconspicuous thallus, immersed perithecia appearing as prominent warts and submuriform ascospores. The arctic-alpine distributed Thelenella pertusariella is distinguished by its darker thallus and smaller ascospores.