Rhytida greenwoodi stephenensis
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| Rhytida greenwoodi stephenensis Powell, 1930 |
Rhytida greenwoodi stephenensis is a terrestrial gastropod in the family Rhytididae, endemic to Stephens Island in Cook Strait, New Zealand.
The shell is larger than typical Rhytida greenwoodi subspecies, but much more loosely coiled, and with considerable acceleration of the last whorl. also, the oblique spiral ridges extend strongly on to the dorsal surface thereby intensifying the malleated appearance of the subsidiary sculpture. Colour is olive-green, without an umbilicus brown zone.
Major diameter is up to 34 mm, and height up to 19 mm.
[edit] References
- Powell A W B, New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
