The corticolous and saxicolous pyrenocarpous crustose lichen species from Kenya and Tanzania were investigated. In total, 32 species could be identified, most of which are new to the respective countries. Some of these were not yet reported from tropical Africa, but so far only known from e.g. the Canary Isles. The following 12 species are apparently reported for the first time from Africa: Anisomeridium terminatum, Mycomicrothelia confusa, Polymeridium contendens, Porina mastoidiza, P. subinterstes, P. tetralocularis, Pyrenula acutalis, P. dermatodes, P. laetior, P. pyrenuloides, P. quassiaecola, and Verrucaria praetermissa. Thelenella modesta is reported for the first time from the Southern Hemisphere.