Tonna tetracotula
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| Tonna tetracotula | ||||||||||||||
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| Tonna tetracotula Hedley, 1919 |
Tonna tetracotula is a very large species of sea snail or tun snail, a marine gastropod mollusc in the family Tonnidae, the tun shells.
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[edit] Distribution
This species is endemic to New South Wales in Australia, and north east New Zealand.
[edit] Habitat
This tun snail is found at depths of between 70 and 140 m.
[edit] Shell description
The shell is very large with broad spiral corrugations, and a single thread at each interspace. The outer-lip is thin edged, but often it is margined within by a thickened ridge.
The shell coloration is white to pale yellowish-brown, the body whorl encircled by two bands of reddish-brown. The aperture is white, sometimes stained light brownish within. The protoconch is dark brown.
The shell height is up to 198 mm, and width 150 mm.
[edit] References
- Powell A. W. B., William Collins Publishers Ltd, Auckland 1979 ISBN 0-00-216906-1
