| Alvania interrupta | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Superfamily: | Rissooidea |
| Family: | Rissoidae |
| Genus: | Alvania |
| Species: | †A. interrupta |
| Binomial name | |
| †Alvania interrupta (H. J. Finlay, 1924) | |
| Synonyms | |
| |
Alvania interrupta is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae. [1]
This species is characterized by its irregularly placed spiral ribs—these are crowded anteriorly but almost absent posteriorly, so that the spire whorls have only two distinct ribs close to the suture below. There are, however, traces of faint, flattish ribs with linear interstices between these and the suture above, and a distinct groove crosses the ribs just below the suture. [2]
Fossils of this marine species were found in Tertiary strata in New Zealand
This article incorporates text from this source, which is in the public domain . This article incorporates text from this source, which is in the public domain .