Bathelium flavostiolatum is a species of corticolous (bark-dwelling) lichen in the family Trypetheliaceae.

Found in Bolivia, it was formally described as a new species in 2016 by lichenologists Adam Flakus and André Aptroot.

The type specimen was collected from the Plan de Manejo AISU in the Ríos Blanco y Negro Wildlife Reserve (Guarayos Province, Santa Cruz Department at an altitude of 240 m (790 ft); there, it was found growing on bark in a lowland Amazon forest.

The pseudostromata ostioles (pores) have nearby white spots that contain lichexanthone; this is a lichen product that causes these spots to fluoresce yellow when lit with a long-wavelength UV light.

The species epithet flavostiolatum refers to this property.