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Staurothele verruculosa J. W. Thomson
Family: Verrucariaceae
Staurothele verruculosa image
Thallus: crustose, verruculose verrucules: combined into angular areolate-appearing areas surface: greenish gray to greenish ashy; usually only slightly convex; subisidiose Perithecia: with base partly immersed in the areoles, black, 0.3-0.5 mm wide involucrellum: dark red to reddish black, dimidiate, 125-150 µm thick; exciple: dark red, c. 50 µm thick; hymenial gelatin: I+ blue asci: broadly clavate, 4 (-8)-spored ascospores: broadly ellipsoid, hyaline, muriform, 7-septate transversely, 1 (-2)-septate longitudinally, 18-32 x 12-25 µm Spot tests: all negative Secondary metabolites: none detected. Substrate and ecology: on conglomerate,1600 m World and Sonoran distribution: thus far only known from central Arizona.