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Sphinctrina tubiformis A. Massal.
Family: Sphinctrinaceae
[Calicium tubaeforme (A. Massal.) R.L. Seym.,  more]
Sphinctrina tubiformis image
Apothecia: 0.15-0.36(-0.45) mm high, often +immersed in the host thallus stalk: absent to short, 0-1.2 times as long as head, black or dark brown capitulum: 0.14-0.25(0.36) mm wide, +spherical but often somewhat expanded vertically and slightly irregular, shiny black or dark brown; SPHINCTRINA exciple: dark brown in section, K-, weakly or not sclerotized asci: cylindrical, when mature 56-78 x 6.8-9.2 µm ascospores: ellipsoidal with pointed ends, non-septate, when mature (9-)12-15.5(-20) x 6-8(-9) µm; surface: with distinctive ornamentation of coarse, longitudinally arranged and reticulately interconnected ridges; spore coat: thin, usually indistinct in water. Substrate and ecology: parasitic or parasymbiotic on thin lichen thalli, e.g., Pertusaria leioplaca and very rarely also on stone World distribution: temperate zones in Europe, Japan, Africa, North and Central America Sonoran distribution: Southern California and Baja California. Notes: An alternative spelling of the name is S. tubiformis. See Tibell (1996a) for fuller description.