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Physella Hordacea
''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description 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 transparent. Species Species in the genus include: * ''Physella acuta'' (Draparnaud, 1805) - Pewter Physa, type species, synonyms: ''Physella heterostropha'' (Say, 1817), ''Physella integra'' (Haldeman, 1841)Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate ''Physa acuta'' are not reproductively isolated from American ''Physa heterostopha'' or '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Acuta
''Physella acuta'' is a species of small, left-handed or sinistral, air-breathing freshwater snail, an Aquatic animal, aquatic gastropod mollusk in the family Physidae. Common names include European physa, tadpole snail, bladder snail, and acute bladder snail. Etymology The name ''Physella'' means "little bladder", from Greek ''physa'', and the Diminutive, diminuative ending "-ella". This is in reference to the genus ''Physa'', which ''P. acuta'' has, at times, been placed in. ''Acuta'' is a Latin word meaning sharp. Shell description Snails in the family Physidae have gastropod shell, shells that are sinistral, which means that if the shell is held with the aperture (mollusc), aperture facing the observer and the spire (mollusc), spire pointing up, then 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. History It was once though ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Columbiana
''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description 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 transparent. Species Species in the genus include: * ''Physella acuta'' (Draparnaud, 1805) - Pewter Physa, type species, synonyms: ''Physella heterostropha'' (Say, 1817), ''Physella integra'' (Haldeman, 1841)Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate ''Physa acuta'' are not reproductively isolated from American ''Physa heterostopha'' or '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Johnsoni
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. Description, habitat and distribution These aquatic pulmonate gastropod mollusks are approximately the size of unpopped corn kernels. The largest ones are only about one centimetre long, and like all of the Physidae, the shells are sinistral or coiled left-handed. The snails' diet consists of periphyton. The Banff Springs snail was first identified in 1926 in the nine sulphurous hot springs of Sulphur Mountain in Banff National Park, Alberta, Canada, and has been found nowhere else. It is very unusual because it is adapted to life in thermal springs where the water is low in oxygen and high in hydrogen sulfide, an environment too harsh for most animals to survive in. Since its discovery, its range has shrunk to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Humerosa
''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description 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 transparent. Species Species in the genus include: * ''Physella acuta'' (Draparnaud, 1805) - Pewter Physa, type species, synonyms: ''Physella heterostropha'' (Say, 1817), ''Physella integra'' (Haldeman, 1841)Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate ''Physa acuta'' are not reproductively isolated from American ''Physa heterostopha'' or '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Gyrina
''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. Shell description 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. Distribution This species is known to occur in: * the USA - indigenous * Great Britain - introduced * Ireland - introduced * Spain References External links ''Physella gyrina''at Animalbase AnimalBase is a project brought to life in 2004 and is maintained by the University of Göttingen, Germany. The goal of the AnimalBase project is to digitize early zoological literature, provide copyright-free ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Globosa
''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description 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 transparent. Species Species in the genus include: * ''Physella acuta'' (Draparnaud, 1805) - Pewter Physa, type species, synonyms: ''Physella heterostropha'' (Say, 1817), ''Physella integra'' (Haldeman, 1841)Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate ''Physa acuta'' are not reproductively isolated from American ''Physa heterostopha'' or '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
