An as-yet-unnamed Powelliphanta species is provisionally known as Powelliphanta sp. from the Baton River. This is one of the amber snails. It is an undescribed species of large, carnivorous land snail, a terrestrial pulmonate gastropod mollusc in the family Rhytididae.
Powelliphanta sp. from the Baton River is classified as Nationally Critical by the New Zealand Department of Conservation.