Astrothelium trypethelioides

Astrothelium trypethelioides is a species of corticolous (bark-dwelling) lichen in the family Trypetheliaceae. Found in Venezuela, it was formally described as a new species in 2016 by André Aptroot. The type specimen was collected by Harrie Sipman along the Carapo River (Cerro Guaiquinima, Bolivar) at an altitude of 800 m. The lichen has a smooth, somewhat shiny, pale yellowish-grey thallus that covers areas of up to 9 cm. Its ascospores are hyaline, spindle-shaped (fusiform) with between 7 and 9 septa and dimensions of 49–52 by 13–16 μm. No lichen products were detected in the species using thin-layer chromatography.