| Alvania macandrewi | |
|---|---|
 | |
| Shell of Alvania macandrewi (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. macandrewi |
| Binomial name | |
| Alvania macandrewi (Manzoni, 1868) | |
| Synonyms | |
| |
Alvania macandrewi 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 2.4 mm and 3 mm.
In some of its forms A. macandrewi greatly resembles some forms of Alvania canariensis . But the spire rises more in steps, the last three whorls are less attenuated, the ribs are wider-set, are broader, and fewer. The spiral scratchings are much more distinct. The heavy white labial rib and the absence of the brown stain either on this rib or on the tip of the apex are very distinctive. [2]
The shell is imperforate, solid and has a yellowish chestnut color. It contains six whorls, turreted or round-shouldered, with close, large, longitudinal ribs, rendered nodulous by spiral impressed lines. The lip is duplicate, the outer lip expanded, with fimbriated edge. [3]
This species occurs in the Atlantic Ocean off Madeira and the Canary Islands.
Calliostoma conulus is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae. This is the type species of the genus.
Alvania aurantiaca is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
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 discors is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania euchila 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 leacocki 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 moniziana 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 subsoluta is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania tarsodes 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 watsoni is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Zebina paivensis is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Zebinidae.
Alvania beanii is a species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.
Ondina obliqua is a rare species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
This article incorporates text from this source, which is in the public domain .