Species of gastropod
Alvania testae is a species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.[1]
Description
The length of the shell varies between 2 mm and 4 mm.
The whitish shell is somewhat solid and transparent. It showsh distant thin pliae, vanishing towards the base, subcancellated by less elevated, distant, spiral lirae. The shell contains six whorls, somewhat convex, with a deep suture. The aperture is effuse below. The outer lip is acute, smooth within and externally varicose. [2]
Distribution
This species occurs in the Atlantic Ocean from Norway to West Africa; in the Mediterranean Sea (Corsica, Italy, Greece).
Fossils have been found in Pleistocene strata near Ficarazzi, Sicily.
References
- Aradas A. & Maggiore G. (1840-1844). Catalogo ragionato delle conchiglie viventi e fossili di Sicilia. Atti dell'Accademia Gioenia di Scienze Naturali
External links
- Jeffreys J.G. (1870). Mediterranean Mollusca. Annals and Magazine of Natural History. ser. 4, 6: 65-86
- 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
- Thanasis Manousis, The Marine Mollusca of Greece: an up-to-date, systematic catalogue, documented with bibliographic and pictorial references
- Glibert, M. (1962). Les Mesogastropoda fossiles du Cénozoïque étranger des collections de l'Institut Royal des Sciences Naturelles de Belgique. Première partie. Cyclophoridae à Stiliferidae (inclus). Institut Royal des Sciences naturelles de Belgiques, Mémoires. Deuxième série. 69: 1-305
