Volvarina roberti

Volvarina roberti
Shell of Volvarina roberti (holotype)
Scientific classification
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
Marginella roberti Bavay, 1917 (original combination) Prunum roberti (Bavay, 1917)

Volvarina roberti is a

(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. ^[2]

Distribution

This marin especies occurs in the Atlantic Ocean off Madeira and the Canary Islands; also off Brazil.

References

• 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