This is a yet-unnamed Powelliphanta species, provisionally known as Powelliphanta "Kirwans". It is one of the amber snails and is an undescribed species of large, carnivorous land snail, a terrestrial pulmonate gastropod mollusc in the family Rhytididae.
Conservation status Powelliphanta "Kirwans"is classified by the New Zealand Threat Classification System as Range restricted.
References
Powell A W B, New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 Department of Conservation Recovery Plans New Zealand Department of Conservation Threatened Species Classification