Alvania partimcancellata
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| Alvania partimcancellata | |
|---|---|
 | |
| Shell of Alvania partimcancellata (holotype) | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Superfamily: | Rissooidea |
| Family: | Rissoidae |
| Genus: | Alvania |
| Species: | †A. partimcancellata |
| Binomial name | |
| †Alvania partimcancellata Harmer, 1920 | |
| Synonyms | |
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Alvania partimcancellata is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.[1]
The length of the shell is 3 mm (0.12 in), and its diameter is 1.5 mm (0.059 in).
(Original description) The minute shell is ovate. It contains 5 slightly convex whorls. They are regularly diminishing in size upwards, the body whorl much the largest. The spire measures about one-third the total length. They are ornamented by numerous longitudinal ribs, disappearing towards the periphery against a series of spiral ridges which continue to the base of the shell, with a single line near the suture. The suture is slightly channelled. The aperture is oval.[2]
