Alvania canariensis
From Wikipedia, the free encyclopedia
| Alvania canariensis | |
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Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Superfamily: | Rissooidea |
| Family: | Rissoidae |
| Genus: | Alvania |
| Species: | A. canariensis |
| Binomial name | |
| Alvania canariensis (d'Orbigny, 1840) | |
| Synonyms | |
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Rissoa canariensis d'Orbigny, 1840 (original combination) | |
Alvania canariensis is a species of minute sea snail, a marine gastropod or micromollusk in the family Rissoidae.[1]
The length of the shell varies between 1 mm and 3 mm.
The imperforate, white shell is solid. It is covered with rounded nodules by the intersection of longitudinal and spiral ribs. The shell contains five whorls, slightly convex, with a rather deep suture. The outer lip is thickened and margined.[2]
About 3 1/2 of the whorls are in the teleoconch, while the other 1 1/2 are in the protoconch.[3]
The protoconch is white, with a black or brown spot at the apex. The teleoconch is usually brown.[3]
