| Volvarina roberti | |
|---|---|
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| Shell of Volvarina roberti (holotype) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Family: | Marginellidae |
| Subfamily: | Marginellinae |
| Genus: | Volvarina |
| Species: | V. roberti |
| Binomial name | |
| Volvarina roberti (Bavay, 1917) | |
| Synonyms | |
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Volvarina roberti is a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails.
Description
The length of the shell attains 9.6 mm.
(Original description in French) The elongated shell is biconical, remarkable for the convexity of the upper whorls. This striking convexity shows especially on the visible part of the penultimate whorl. The shell consists of 4½ to 5 whorls, the first one obtuse. They are separated by a fairly smooth and very narrowly margined suture. The body whorl is convex, especially in its upper part, but obtuse at its lower part. It forms 3/4 of the total height of the shell. The aperture is elongated, slightly oblique and dilated in its lower half only. The smooth outer lip is almost straight. The inner lip contains at the base four very prominent, inclined plaits, of which the three lower ones are substantially equal to each other, the fourth is a little more stocky. The shell has a very light fawn color with three bands a little darker on the body whorl. The outer lip and the columellar plaits are whitish.
Distribution
This marin especies occurs in the Atlantic Ocean off Madeira and the Canary Islands; also off Brazil.
References
- Volvarina roberti Bavay, 1917. Retrieved through: World Register of Marine Species on 24 April 2010.
- Bavay, A. (1917). Quelques coquilles des sables littoraux de divers pays. Journal de Conchyliologie. 63(2): 91-114
- Cossignani, T. (2006). Marginellidae & Cystiscidae of the World. L'Informatore Piceno. 408 pp.
External links
- Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca. in: Costello, M.J. et al. (eds), European Register of Marine Species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Patrimoines Naturels. 50: 180-213.
- Conchology.be: image
| Taxon identifiers | |
|---|---|
| Volvarina roberti | |