| Alvania zetlandica | |
|---|---|
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| Shell of Alvania zetlandica (specimen at the Natural History Museum, Rotterdam) | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Rissoidae |
| Genus: | Alvania |
| Species: | A. zetlandica |
| Binomial name | |
| Alvania zetlandica (Montagu, 1815) | |
| Synonyms [1] | |
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Alvania zetlandica is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae. [1]
The length of the shell varies between 2.5 mm and 5 mm.
The imperforate shell is solid, opaque and whitish. It is cancellated and almost muricated by subequal longitudinal and spiral distant lirae. The shell contains seven whorls, angularly shouldered above and with a deep suture. The longitudinal sculpture is evanescent on the lower part of the body whorl, where the spiral sculpture becomes more prominen. The outer lip is thickened. [2]
This species occurs in European waters (also off the Cape Verde), the Mediterranean Sea and arctic waters of Canada.
Fossils were found in Pleistocene strata near Messina and in Pliocene strata near Savona, Italy.
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.
Alvania canariensis is a species of minute sea snail, a marine gastropod or micromollusk in the family Rissoidae.
Alvania cancellata is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania carinata 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 dictyophora 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 lactea 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 mamillata 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 scabra is a species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.
Alvania sororcula 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 tenera is a species of minute sea snail, a marine gastropod mollusc 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 beanii is a species of minute sea snail, a marine gastropod mollusc 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 partimcancellata is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.