Verrucaria Timkoii
''Verrucaria'' is a genus of lichenized (lichen-forming) fungi in the family Verrucariaceae. Taxonomy The genus was circumscription (taxonomy), circumscribed by German botanist Heinrich Adolph Schrader in 1794, with ''Verrucaria rupestris'' assigned as the type species. In his brief diagnosis of the genus, Schrader mentioned the more or less spherical (''subglobose''), closed ascomata, and the crustose lichen, crustose thallus. The genus name is derived from the Latin word ''verruca'' (meaning "wart") and the suffix ''-aria'' (meaning "belonging to" or "possession"). Ecology As of 2015, there were 16 ''Verrucaria'' species classified as Marine fungi#Lichens, marine species: ''Verrucaria adguttata, V. adguttata'', ''Verrucaria allantoidea, V. allantoidea'', ''Verrucaria ceuthocarpa, V. ceuthocarpa'', ''Verrucaria corallensi, V. corallensi'', ''Verrucaria ditmarsica, V. ditmarsica'', ''Verrucaria erichsenii, V. erichsenii'', ''Verrucaria halizoa, V.&nb ...
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Verrucaria Nigrescens
''Verrucaria nigrescens'' is a widespread species of crustose lichen in the family Verrucariaceae. It was first species description, formally described as a new species by Christiaan Hendrik Persoon in 1795. The lichen produces a very dark brown thallus that saxicolous lichen, grows on rocks; the medulla (lichenology), medulla is black. There are black perithecia that resemble buried dots, and which measure 0.15–0.3 mm in diameter. Ascospores measure 14–24 by 7–11 micrometre, μm. See also * List of Verrucaria species, List of ''Verrucaria'' species References

Verrucaria, nigrescens Lichen species Lichens described in 1795 Lichens of Europe Lichens of North America Taxa named by Christiaan Hendrik Persoon {{Eurotiomycetes-stub ...
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