Liratomina adelaidensis is an extinct species of sea snail, a marine gastropod mollusc, in the superfamily Conoidea, currently unassigned to a family. Fossils of the species date to the middle Miocene and late Pliocene, and are found in the strata of the Eucla Basin (Western Australia and South Australia), and the St Vincent Basin of South Australia.
In the original description, Powell described the species as follows:
The holotype measured in height and in diameter. Powell noted similarities in appearance between the species and members of Austrotoma at a superficial level.
The species was first described by A. W. B. Powell in 1944. The holotype was collected by W. Howchin and J.C. Verco in 1919 from the Metropolitan Abattoirs Bore in Adelaide, South Australia, at a depth of . It is held by the Auckland War Memorial Museum.
This extinct marine species occurs in middle Miocene and late Pliocene strata of the Eucla Basin of Western Australia and South Australia, and the St Vincent Basin of South Australia, including the Roe Calcarenite and the Dry Creek Sands.