Ondina coarctata
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| Ondina coarctata | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Family: | Pyramidellidae |
| Genus: | Ondina |
| Species: | O. coarctata |
| Binomial name | |
| Ondina coarctata (Sars G.O., 1878) | |
| Synonyms | |
|
Evalea coarctata (Sars G.O., 1878) | |
Ondina coarctata is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.[1][2]
The shell of the snail is thin, fragile, and pale yellowish in color, with a narrowly conical shape. The spire is long, slightly tapering, and ends in a conical-blunt apex. The shell has 6-7 tightly pressed whorls, with the last whorl being somewhat dilated. The base is relatively broad, occupying about half the length of the shell. The suture is slightly oblique and narrowly impressed. The aperture is oblong, expanding at the bottom, with a somewhat curved external lip. The columella is slightly arched, and the umbilicus is distinct and deep. The surface is covered with fine, uniform spiral lines. The length of the shell typically reaches about 5.2 mm.[3]