Abstract
Lepisiota omanensis sp. nov. is described and illustrated based on the worker caste collected in Jebel Qahwan Oman, and Ain Al Waal, United Arab Emirates. The new species belongs to the L. gracilicornis group and is separated easily from all Arabian Lepisiota species, and other species in the gracilicornis group, by the exceptionally long, acute and strongly curved propodeal spines. Lepisiota elegantissima Collingwood & van Harten is recorded for the first time from Oman. Lepisiota simplex (Forel) stat rev. is recognised at species rank. Ecological and biological observations are provided. A revised key to the Arabian species of Lepisiota is given. A checklist of the Arabian Lepisiota species is presented.