Calliostoma osbornei
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| Calliostoma osbornei | ||||||||||||||
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| Calliostoma osbornei Powell, 1926 |
Calliostoma osbornei is a species of medium-sized sea snail, a marine gastropod mollusc. Some authors have placed this genus in the family Calliostomatidae, other malacologists have left it in the family Trochidae.
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[edit] Distribution
This species is endemic to New Zealand. It is found along the east coast and offshore islands of the North Island.
[edit] Habitat
This top snail is found at depths of about 50 m.
[edit] Shell description
The shell of this species is of moderate size, solid, similar to Calliostoma punctulatum, but narrower, with a very tall spire, straight outlines, and more numerous whorls, with only six granose spiral cords.
The external shell coloration is yellowish-brown, with the spiral cords being dark reddish-brown between whitish gemmules.
The shell height is up to 32 mm, and the width is up to 26 mm.
[edit] References
- Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
