Astrothelium flavomeristosporum
Astrothelium flavomeristosporum is a species of corticolous (bark-dwelling),  crustose lichen in the family Trypetheliaceae. Found in Ecuador and the Philippines, it was formally described as a new species in 2016 by Dutch lichenologist André Aptroot. The type specimen was collected by American botanist Edward Elmer from Irosin (Sorsogon, Luzon), in 1916. The lichen has a smooth and somewhat shiny, greyish-green thallus with a cortex surrounded by a thin (0.1 mm wide) black prothallus line. It covers areas of up to  in diameter, and does not induce the formation of galls in the host tree. No lichen products were detected in the species using thin-layer chromatography. The main characteristics of the lichen distinguishing it from others in Astrothelium are its smooth to uneven thallus, its prominent, blackish, and exposed ascomata, and its yellow . References

flavomeristosporum
Lichen species
Lichens described in 2016
Lichens of Ecuador
Lichens of Malesia
Taxa named by André Aptroot