Physella gyrina
| Physella gyrina | |
|---|---|
 |
|
| Physella gyrina figure 10 | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| (unranked): | clade Heterobranchia clade Euthyneura clade Panpulmonata clade Hygrophila |
| Superfamily: | Planorboidea |
| Family: | Physidae |
| Subfamily: | Physinae |
| Tribe: | Physellini |
| Genus: | Physella |
| Species: | P. gyrina |
| Binomial name | |
|
Physella gyrina (Say, 1821) |
|
| Synonyms | |
|
Physa gyrina Say, 1821 |
|
Physa gyrina Say, 1821
Physella gyrina, common name the "tadpole physa", is a species of small, left-handed or sinistral, air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Physidae.
Snails in the family Physidae have shells that are sinistral, which means that if the shell is held with the spire pointing up, and the aperture is facing the observer, the aperture is on the left-hand side.
The shells of Physella species have a long and large aperture, a pointed spire, and no operculum. The shells are thin and corneous and rather transparent.
This species is known to occur in:
...
Wikipedia