A new monotypie genus of flatid planthoppers (Hemiptera: Fulgoromorpha: Flatidae) is described from Socotra island (Yemen): Haloflata gen. nov. for H. arthrocnemi sp. nov. (type species). Habitus, male and female external and internal genital structures of the new species are illustrated and compared with similar taxa. The new species was found in association with Arthrocnemum macrostachyum (Amaranthaceae) in coastal saltmarshes in western Socotra.