| Alvania beanii | |
|---|---|
 | |
| Shell of Alvania beanii | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Superfamily: | Rissooidea |
| Family: | Rissoidae |
| Genus: | Alvania |
| Species: | A. beanii |
| Binomial name | |
| Alvania beanii (Hanley in Thorpe, 1844) | |
| Synonyms | |
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Alvania beanii is a species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae. [1]
The length of the shell varies between 2.2 mm and 4 mm.
This broad shell has an oval-conical shape. It contains up to seven whorls and with deep sutures. The protoconch is multispiral. Its surface is reticulated by the close-packed ribs and the spiral cords (6 to 7 spiral cords on the body whorl above the aperture). The large aperture has an oval shape with a thick rim. The outer lip shows internal ridges and a well-developed varix. The inner lip is reflected over the umbilical region (but there is no umbilicus).
The color of the shell is white, cream or orange. There are often two brown bands on the body whorl.
This species occurs in European waters, from the North Coast of Norway and the North East Atlantic Ocean down to the Canary Islands. It can also be found in the Mediterranean Sea (Corsica, Tunisia, Greece, Turkey).
Fossils have been found in Scaldisian (Pliocene) strata in Suffolk, Great Brittain; in Pleistocene strata in Belfast, Northern Ireland and Santa Flavia, Sicily.
Tritia incrassata, common name the thick-lipped dogwhelk, is a species of small sea snail, a marine gastropod mollusk in the family Nassariidae, the Nassa mud snails or dog whelks.
Tritia recidiva is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the nassa mud snails or dog whelks.
Margarites costalis, common name the boreal rosy margarite or the northern ridged margarite, is a species of sea snail, a marine gastropod mollusk in the family Margaritidae.
Alvania cancellata is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania cimex is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania cimicoides is a species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.
Alvania discors is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania fischeri is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania jeffreysi is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania lineata is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania parvula is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania punctura is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania subsoluta is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania testae is a species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.
Alvania almo is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania trachisma is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania belli is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.
Alvania dubiosa is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.
Alvania erecta is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.
Alvania partimcancellata is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.
