Astrothelium flavomaculatum
Astrothelium flavomaculatum is a species of corticolous, crustose lichen in the family Trypetheliaceae. Found in Guyana, Venezuela, and Ecuador, it was formally described as a new species in 2016 by Dutch lichenologist André Aptroot. The type specimen was collected by the author from the Cordillera del Cóndor at an altitude of. The lichen has a shiny, smooth to somewhat bullate thallus that covers an area of up to in diameter. It is green with a thin orange pruina. Its ascospores are hyaline, ellipsoid in shape, and muriform, with dimensions of 50–75 by 12–25 μm. It is somewhat similar in appearance to Astrothelium graphicum , but that species has somewhat smaller ascospores with lengths up to 66 μm.