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Shell of Physella acuta. Snails in the family Physidae have shells that are sinistral, which means that if the shell is held with the aperture facing the observer and the 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 ...
According to ITIS and WoRMS, this family is classified into 4 genera, although the 4 genera from each database has a little bit difference.The classification from the taxonomy by Bouchet & Rocroi (2005), [3] which is based on classification by Taylor (2003): [7] Taylor classifies Physidae according to the anatomical differences of their penis, the differences among the penial complex, penial ...
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 .
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 .
Physella acuta; Physella ancillaria Say 1825 - Pumpkin Physa; Physella bermudezi Aguayo 1935 - Lowdome Physa; Physella bottimeri Clench 1924 - Comanche Physa; Physella boucardi Cross and Fischer 1881 - Desert Physa; Physella columbiana Hemphill 1890 - Rotund Physa; Physella conoidea Fischer and Crosse 1886 - Texas Physa; Physella cooperi Tryon ...
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Species available vary in different parts of the world. In the United States, commonly available species include ramshorn snails such as Planorbella duryi, bladder snails such as Physella acuta, apple snails such as Pomacea bridgesii, the high-spired thiarid Malaysian trumpet snail, Melanoides tuberculata, and several Neritina species.
Basommatophora was a term that was previously used as a taxonomic informal group, a group of snails within the informal group Pulmonata, the air-breathing slugs and snails.. According to the taxonomy of the Gastropoda (Bouchet & Rocroi, 2005), whenever monophyly has not been tested, or where a traditional taxon of gastropods has now been discovered to be paraphyletic or polyphyletic, the term ...