Powellisetia comes is an extinct species of marine gastropod mollusc in the family Rissoidae. First described by Harold John Finlay in 1926, it is known to have lived in New Zealand during the early Miocene.
Finlay described the species as follows:
Fossils of the species have only been identified in New Zealand. The holotype was collected from the Mount Harris Formation near Pukeuri, Otago, which dates to the early Miocene era.