• Source: Physella

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)
Physella ancillaria (Say, 1825)
Physella bermudezi (Aguayo, 1935) - Lowdome Physa
Physella bottimeri (Clench, 1924) - Comanche Physa
Physella boucardi (Crosse & P. Fischer, 1881) - Desert Physa
Physella columbiana (Hemphill, 1890) - Rotund Physa
Physella conoidea (P. Fischer & Crosse, 1886) - Texas Physa
Physella cooperi (Tryon, 1865) - Olive Physa
Physella costata (Newcomb, 1861) - Ornate Physa
Physella cubensis (Pfeiffer, 1839)
Physella globosa (Haldeman, 1841) - Globose Physa
Physella gyrina (Say, 1821)
Physella hendersoni (Clench, 1925)
Physella hordacea (I. Lea, 1864) - Grain Physa
Physella humerosa (Gould, 1855) - Corkscrew Physa
Physella johnsoni (Clench, 1926) - Banff Springs Snail
Physella lordi (Baird, 1863) - Twisted Physa
Physella magnalacustris (Walker, 1901)
Physella mexicana (Philippi, 1841) - Polished Physa
Physella microstriata (Chamberlin & E. G. Berry, 1930)
Physella natricina Taylor, 1988
Physella osculans (Haldeman, 1841) - Cayuse Physa
Physella parkeri (Currier, 1881) - Broadshoulder Physa
Physella propinqua (Tryon, 1865) - Rocky Mountain Physa
Physella sayi
Physella spelunca (Turner & Clench, 1974)
Physella squalida (Morelet, 1851) - Squalid Physa
Physella traski (I. Lea, 1864) - Sculpted Physa
Physella utahensis (Clench, 1925)
Physella vinosa (Gould, 1847) - Banded Physa
Physella virgata (Gould, 1855)
Physella virginea (Gould, 1847) - Sunset Physa
Physella winnipegensis ..., 2004
Physella wrighti Te & Clarke, 1985
Physella zionis (Pilsbry, 1926)




See also


Physa




References

Kata Kunci Pencarian:

• Physella acuta
• Physella
• Banff Springs snail
• Physella parkeri
• Physella gyrina
• Physidae
• Physa
• Cave physa
• Utah physa
• Fish Lake physa