Alvania discors is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.[1]
| Alvania discors | |
|---|---|
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Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Rissoidae |
| Genus: | Alvania |
| Species: | A. discors
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| Binomial name | |
| Alvania discors (Allan, 1818)
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| Synonyms[1] | |
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Description
editThe length of the shell varies between 4 mm and 5 mm.
(Original description) The shell is pointed and strong. It contains five longitudinal and transverse striae. Inside it is ribbed. The outer lip is thickened. The body is longer than the spire.[2]
(Description as Rissoa montagui) The shell is imperforate and, thick. It is spirally lirate, longitudinally strongly ribbed. It is whitish, yellowish or has a chestnut color, plain or with one or two bands. The shell contains five whorls. The suture is distinct and subchanneled. The aperture is white-lipped and sulcate within, with a white varix externally. [3]
Distribution
editThis marine species has a wide distribution. It is found in the following locations:
- European waters
- Mediterranean Sea (Italy, Greece)
- Atlantic Ocean (Canada, USA)
- Pacific Ocean
Fossils have been found in Pleistocene strata near Santa Flavia, Sicily and near Monastir, Tunisia; also in Pliocene strata near Siena, Italy.
References
edit- ^ a b Alvania discors (Allan, 1818). Gofas, S. (2009). Alvania discors (Allan, 1818). In: Bouchet, P.; Gofas, S.; Rosenberg, G. World Marine Mollusca database. Accessed through the World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=141181 on 18 April 2012 .
- ^ Allan T. (1818). Sketch of the geology of the environs of Nice. Transactions of the Royal Society of Edinburgh 8(2): 427-464, pl. 8-10
- ^ G.W. Tryon (884), Manual of conchology, structural and systematic : with illustrations of the species; Academy of Natural Sciences ser. 1, vol. 9
- Zhizhchenko, B. (1936). Чокракские моллюски [= Chokrakian molluscs]. Paleontologija SSSR. 10(3): 1–323, 26 pls.
External links
edit
Wikimedia Commons has media related to Alvania discors.
- Risso, A. (1826-1827). Histoire naturelle des principales productions de l'Europe Méridionale et particulièrement de celles des environs de Nice et des Alpes Maritimes.
- Payraudeau, B. C. (1826). Catalogue descriptif et méthodique des annelides et des mollusques de l'Ile de Corse; avec huit planches représentant quatre-vingt-huit espèces, dont soixante-huit nouvelles. Imprimerie de J. Tastu, Paris, vii + 218 pp., pls. 1-8
- Aradas A. & Benoit L. (1872-1876 ("1870") ). Conchigliologia vivente marina della Sicilia e delle isole che la circondano. Atti dell'Accademia Gioenia di Scienze Naturali. ser. 3, 6
- Jeffreys, J. G. (1884). On the Mollusca procured during the 'Lightning' and 'Porcupine' expeditions 1868-70 (Part VII). Proceedings of the Zoological Society of London. 1884: 111-149, pl. 9-10
- Deshayes, G. P. (1835). Mollusques. pp. 81-203, iii, pls. 18-28, 1 text fig. In: J.-B.-G.-M. Bory de Saint-Vincent (ed.), Expédition scientifique de Morée. Section des sciences physiques. Tome III (1.re Partie). Zoologie. Paris, F.G. Levrault.
- Bivona, A. (1838). Generi et specie di molluschi descritti dal Barone Antonio Bivona e Bernardi. Lavori postumi pubblicati dal figlio Andrea dottore in medicina con note ed aggiunte. Giornale di Scienze Lettere e Arti per la Sicilia. 61: 211-227
- Brugnone, G. (1880). Le conchiglie plioceniche delle vicinanze di Caltanisetta. Bullettino della Società Malacologica Italiana. 6: 85-158, 1 pl.
- 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