Benhamina obliquata is a species of air-breathing sea snail, a false limpet, a marine pulmonate gastropod mollusc in the family Siphonariidae. This species is very large compared with the other species in the family.This is the only species in this genus; in other words, Benhamina is a monotypic genus. It is endemic to New Zealand.Generic name Benhamina is in tribute to British oligo- and polychaetologist, William Blaxland Benham.