Goniobasis catenaria catenaria
17.4 mm

Goniobasis catenaria dislocata
17.1 mm

Goniobasis proxima
17.7 mm

Goniobasis virginica
24.0 mm

Goniobasis semicarinata
18.1 mm

Leptoxis carinata
13.3 mm

Amnicola limosa
3.8 mm

Lyogyrus granum
2.6 mm

Somatogyrus virginicus
3.6 mm

Fontigens nickliniana
3.6 mm

Fontigens orolibas
3.1 mm

Fontigens bottimeri
1.9 mm

Fontigens morrisoni
2.6 mm

Littoridinops tenuipes
3.4 mm

Bithynia tentaculata
11.7 mm

Lymnaea humilis
5.9 mm

Physa acuta
8.3 mm

Physa pomilia
6.7 mm

Physa species A
12.0 mm

Physa gyrina
11.5 mm

Helisoma trivolvis
13.9 mm

Helisoma anceps
8.4 mm

Gyraulus deflectus
3.8 mm

Gyraulus parvus
2.9 mm

Menetus dilatatus
2.4 mm

Planorbula armigera
7.1 mm

Ferrissia rivularis
4.6 mm

Ferrissia fragilis
2.8 mm

Laevapex fuscus
5.9 mm