Punctelia Colombiana
''Punctelia colombiana'' is a species of corticolous (bark-dwelling) and foliose (leafy) lichen in the family Parmeliaceae. It is found in South America. Taxonomy The lichen was formally described as a new species in 1984 by Belgian lichenologist Emmanuël Sérusiaux, from collections made in the Andean Mountains of Colombia. The type specimen was collected near Medellín, at an altitude of . The specific epithet ''colombiana'' refers to the country where it was first scientifically documented. The species was later recorded in Argentina and Brazil (Rio Grande do Sul). Description The thallus of ''Punctelia colombiana'' attains a diameter of up to . It is tightly attached to its bark substrate, and has a greenish-gray to ash-grey colour. Pseudocyphellae are white, small (measuring 0.1–0.2 mm in diameter) and evenly distributed throughout the thallus surface. Isidia are present over much of the surface. The medulla is white, and it measures 80.0–130.0 μm thi ...
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