Abstract
A new benthic polyhalobous diatom species, Lunella garyae, is described from supralittoral limestone rock pools at Dancing Ledge, English Channel coast, England. The detailed morphology of this species is examined using scanning electron microscopy (SEM) and light microscopy (LM). The new species is compared with the two previously described Lunella species and with some other morphologically similar diatom taxa. The identity of the genus Lunella is discussed.