Gibbula zonata
| Gibbula zonata | |
|---|---|
 | |
| Drawing of a shell of Gibbula zonata | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Clade: | Vetigastropoda |
| Superfamily: | Trochoidea (superfamily) |
| Family: | Trochidae |
| Genus: | Gibbula |
| Species: | G. zonata |
| Binomial name | |
| Gibbula zonata (Woods, 1828) | |
| Synonyms | |
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Gibbula zonata is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.[1]
Description
The size of the shell varies between 6 mm and 10 mm. The rather solid shell is imperforate but excavated at the place of the umbilicus. It has a depressed-conical shape. It is whitish, with numerous spiral bauds and lines of purplish-brown. The surface is very lightly obliquely striate, closely, densely finely spirally striate, generally with three strong carinae, one at periphery, the others above. The about 5 whorls are convex, those of the upper surface bicarinate. The convex body whorl is carinate or subcarinate. The oblique aperture is rounded-quadrangular. It is nacreous inside with slight sulci at the positions of the external carina. The columella is a little straightened.[2]
Distribution
This species occurs in the Atlantic Ocean off Namibia and the western coast of South Africa; in the Indian Ocean off the Agulhas Bank.
References
- ↑ Gibbula zonata (Woods, 1828). Retrieved through: World Register of Marine Species on 1 May 2010.
- ↑ Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
- P. Bartsch (1915), Report on the Turton collection of South African marine mollusks, with additional notes on other South African shells contained in the United States National Museum; Bulletin of the United States National Museum v. 91 (1915)
- Kilburn, R.N. & Rippey, E. (1982) Sea Shells of Southern Africa. Macmillan South Africa, Johannesburg, xi + 249 pp. page(s): 41