The terrestrial diatom Luticola beyensii sp. nov. is described from relatively dry soil samples on the subtropical Saint Paul Island (Indian Ocean, TAAF). The detailed morphology of this taxon is examined using both light and scanning electron microscopy (SEM) and compared with similar species. The structure of the raphe terminations combined with the valve outline and the structure of the central area are the main morphological features. L. beyensii is found in bare, dry soil samples dominated by Diadesmis-taxa.