Powelliphanta gilliesi gilliesi, 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 found only on the northern part of the Wakamarama Range
in West Nelson
, from near sea level to 2,000 ft
The shell has a depressed shape due to the relatively low height of the whorls, and there is a distinctly granulated parietal callus
The coloration of the dorsal surface is dull brownish, crossed by numerous darker brown and reddish-brown spiral lines. The ventral surface is glossy, outwardly bright red-brown, but most of the base is occupied by a dark-brown, almost black, central zone, with a clearly defined outer edge.
The major diameter is up to 48 mm, and height up to 24 mm.
- Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1