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Physidae, commonly called the bladder snails, is a family of small air-breathing freshwater snails, aquatic pulmonate gastropod molluscs in the superfamily Lymnaeoidea. [ 3 ] [ 4 ] Overview
These small snails, like all the species in the family Physidae, have shells that are sinistral, which means that when the shell is held with the spire pointing up and the aperture facing the viewer, then the aperture is on the left-hand side. The shells of Physa species have a long and large aperture, a pointed spire, and no operculum. The ...
Physella acuta is a species of small, left-handed or sinistral, air-breathing freshwater snail, an aquatic gastropod mollusk in the family Physidae. Common names include European physa , tadpole snail , bladder snail , and acute bladder snail .
Physa fontinalis, common name the common bladder snail, is a species of air-breathing freshwater snail, an aquatic gastropod mollusc in the family Physidae. The shells of species in the genus Physa are left-handed or sinistral .
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 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 ...
The Banff Springs snail (Physella johnsoni) is a species of small air-breathing freshwater snail in the family Physidae. Based on molecular research, it appears that Physella johnsoni separated out as a species from Physella gyrina about 10,000 years ago.
Freshwater snails are ... The freshwater snail Physa acuta is in the subclass Heterobranchia and the family Physidae. P. acuta is a self-fertile snail that can ...
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 ...