Pleuroceridae
      Pleuroceridae       Io fluvialis       Athearnia anthonyi    Scientific classification    Kingdom:    Animalia     Phylum:    Mollusca     Class:    Gastropoda     (unranked):    clade Caenogastropoda clade Sorbeoconcha      Superfamily:    Cerithioidea     Family:    Pleuroceridae   Fischer, 1885     Diversity [1] [2]   About 150 extant species    Pleuroceridae , common name pleurocerids , is a family of small to medium-sized freshwater snails, aquatic gilled gastropod mollusks in the superfamily Cerithioidea.These snails have an operculum and typically a robust high-spired shell.   Reproduction is iteroparous, and juvenile snails emerge from eggs laid on a firm surface by a gonochoristic female.  There is no veliger stage.     Contents      1  Distribution    2  Taxonomy    2.1  2005 taxonomy    2.2  2009 taxonomy      3  Genera    4  References    5  Further reading    6  External links       Distribution   As currently defined, this family is confined entirely to eastern Nort...