 | This article relies on a single source. (March 2025) |
| Alvania ismar Temporal range: | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Rissoidae |
| Genus: | Alvania |
| Species: | †A. ismar |
| Binomial name | |
| †Alvania ismar | |
Alvania ismar is an extinct species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
The species occurred at the Strait of Sicily in the Pleistocene at depths of 649 meters.
The species had a height of 2.87 mm and a width of 1.7 mm. The species had a medium sized, ovate-conical shell, with a spiral sculpture on the whole teleoconch. Strong axial ribs do not reach the base and the inner side of the outer lip is without denticles, protoconch is paucispiral.
 | This prehistoric mollusc article is a stub. You can help Wikipedia by adding missing information. |