Species of gastropod
Calliostoma gualterianum, common name Gualtieri's top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.[4]
Description
The size of the shell varies between 10 mm and 17 mm.
The imperforate, polished, solid shell has a conical-elevated shape with 9 whorls. It is yellowish-brown or olive, clouded with brown, the earlier 4 whorls dark bluish or greenish. The shell is spirally sulcate, the 2d whorl somewhat granulate. The rest of the whorls are smooth, flat, and with a narrow supra-sutural fasciole, which on the body whorl is not developed. The periphery is rounded angular. The base of the shell is smooth except for about 4 fine riblets around the axis. The aperture is smooth within. The nacreous columella is a trifle swollen at its base, and either purple or whitish inside.[5]
Distribution
This species occurs in the Mediterranean Sea.
References
- ^ Philippi., in Conchyl. Cab., p. 69, t. 13,'f. 15.
- ^ Fischer, Coq. Viv., p. 404, 1. 119, f. 5.
- ^ Weinkauff, Conchyl. des Mittelm. ii, p. 361
- ^ Calliostoma gualterianum (Philippi, 1848). Retrieved through: World Register of Marine Species.
- ^ Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
- Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180–213
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