Viviparidae |

Campeloma decisum decisum
24.5 mm |

Campeloma decisum crassulum
41.4 mm |

Viviparus intertextus
23.7 mm |

Viviparus subpurpureus
22.2 mm |

Viviparus georgianus
25.0 mm |

Lioplax subcarinata
14.3 mm |
Cipangopaludina japonica
55.4 mm |
|

Cipangopaludina chinensis
47.5 mm |
Valvatidae |
|

Valvata tricarinata
5.2 mm |
|
Pleuroceridae |

Pleurocera virginica
24.0 mm |

Pleurocera proxima
17.7 mm |

Pleurocera shenandoa
18.1mm |

Pleurocera semicarinata semicarinata
17.8 mm |

Pleurocera semicarinata livescens
15.4 mm |

Pleurocera semicarinata obovata
15.4 mm |

Pleurocera canaliculata acuta
20.5 mm |

Pleurocera canaliculata canaliculata
38.0 mm |

Pleurocera
troostiana lyonii
23.9 mm |

Pleurocera
simplex simplex
17.6 mm |

Pleurocera simplex ebenum
15.6 mm |

Pleurocera
gabbiana
14.4 mm |

Pleurocera
clavaeformis clavaeformis
24.0 mm |

Pleurocera
laqueata laqueata
19.4 mm |

Pleurocera laqueata alveare
19.6 mm |

Lithasia verrucosa
20.0 mm |

Lithasia geniculata geniculata
18.3 mm |

Lithasia armigera
28.8 mm |

Leptoxis
praerosa
12.1 mm |
|

Leptoxis carinata
13.3 mm |
Pomatiopsidae |

Pomatiopsis lapidaria
5.7 mm |
|

Pomatiopsis cincinnatiensis
5.2 mm |
Other hydrobioids |

Amnicola limosa
3.8mm |

Lyogyrus granum
2.6 mm |

Probythinella
emarginata
3.1 mm |

Marstonia scalariformis
3.2 mm |

Marstonia lustrica
4.6 mm |

Marstonia letsoni
2.2 mm |

Birgella subglobosa
7.7 mm |

Somatogyrus integra
3.7 mm |

Cincinnatia integra
4.5 mm |

Fontigens nickliniana
3.6 mm |

Fontigens orolibas
3.1 mm |

Fontigens bottimeri
1.9 mm |

Fontigens cryptica
1.9 mm |

Fontigens tartarea
1.8 mm |

Fontigens turritella
1.5 mm |

Fontigens benfieldi
1.9 mm |

Fontigens davisi
2.5 mm |

Antroselates spiralis
3.3 mm |
Lymnaeidae |

Lymnaea stagnalis
41.4 mm |

Lymnaea
elodes
25.5 mm |

Lymnaea
catascopium
18.6 mm |

Lymnea columella
10.4 mm |

Lymnaea humilis
5.9 mm |

Lymnea caperata
11.0 mm |
Physidae |

Physa acuta
8.3 mm |

Physa
vernalis
6.0 mm |

Physa gyrina
11.5 mm |
|

Aplexa elongata
12.6 mm |
|
Planorbidae |

Helisoma trivolvis
18.5 mm |

Helisoma anceps
8.4 mm |

Helisoma campanulatum
11.9 mm |

Gyraulus parvus
2.9 mm |

Gyraulus deflectus
3.8 mm |

Gyraulus circumstriatus
5.1 mm |

Planorbula armigera
7.1 mm |

Promenetus exacuous
3.5 mm |

Menetus dilatatus
2.4 mm |
Ancylidae |

Ferrissia rivularis
4.5 mm |

Ferrissia
fragilis
3.1 mm |

Laevapex fuscus
5.9 mm |
|

Rhodacmea filosa
4.1 mm |
|