The ecphyline genus Aivalykus Nixon, 1938 is discussed. A new species, A. microaciculatus Ranjith et Belokobylskij, sp. nov. from India and United Arab Emirates is described and illustrated. A key to all extant species of the genus Aivalykus is provided.
Keywords: Hymenoptera, Ecphylini, scolytine parasitoid, new species, micro-aciculate sculpture, South Asia.