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Rivicola Fitzinger, 1833 (Invalid: junior objective synonym of Physa, with the same type species) Physa is a genus of small, left-handed or sinistral, air-breathing freshwater snails , aquatic pulmonate gastropod molluscs in the subfamily Physinae of the family Physidae .
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 .
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 .
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Laurentiphysa chippuvarum Taylor 2003 - Chippewa Physa; Physa carolinae Wethington, Dillon, Wise 2009 - Carolina Physa; Physa jennessi Dall 1919 - Obtuse Physa; Physa megalochlamys Taylor 1988 - Cloaked Physa; Physa natricina Taylor 1988 - Snake River Physa; Physa sibirica Westerlund 1876 - Frigid Physa; Physa skinneri Taylor 1954 - Glass Physa
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. Drawing of the eggs of Physella gyrina: upper image is the egg-mass showing position of eggs in envelope. Lower images is a single egg showing the position of an embryo.
Bruce Willis’s daughters Tallulah and Scout Willis shared a sweet family snap with their dad as they celebrated Thanksgiving. Taking to social media, Tallulah, 30, and Scout, 33, shared a joint ...
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