Powelliphanta lignaria ruforadiata, known as one of the amber snails, is a subspecies of large, carnivorous land snail, a terrestrial pulmonate gastropod mollusc in the family Rhytididae.
This subspecies is endemic
to the South Island
of New Zealand
. It is only found about 5 miles north of the Mokihinui River
, extending down the north side of the Mokihinui River gorge.
The ground colour is dark raw-umber and there is an axial pattern of broad, rather sparse, irregular, dark reddish-brown streaks.
The shell diameter is up to 47 mm, and height up to 29 mm.
Powelliphanta lignaria ruforadiata
is classified by the New Zealand Department of Conservation
as being Nationally Endangered