| Viviparidae |
Campeloma decisum decisum
24.5 mm |
Campeloma decisum crassulum
41.4 mm |
Campeloma decisum decampi
32.9 mm |
Viviparus georgianus
25.0 mm |
Viviparus intertextus
23.7 mm |
Viviparus
subpurpureus
22.2 mm |
|
Lioplax subcarinata
14.3 mm |
|
| Pleuroceridae |
Lithasia armigera armigera
28.8 mm |
Lithasia armigera jayana
28.9 mm |
Lithasia armigera duttoniana
23.3 mm |
Lithasia geniculata geniculata
18.3 mm |
Lithasia geniculata fuliginosa
21.5 mm |
Lithasia geniculata pinguis
15.2 mm |
Io
fluvialis
41.1 mm |
Lithasia verrucosa
20.0 mm |
Leptoxis crassa
19.6 mm |
Leptoxis
praerosa praerosa
12.1 mm |
Leptoxis
praerosa umbilicata
10.4 mm |
Leptoxis carinata
13.3 mm |
Pleurocera
clavaeformis clavaeformis
24.0 mm |
Pleurocera
clavaeformis unciale
21.7 mm |
Pleurocera clavaeformis acutocarinata
22.2 mm |
Pleurocera
troostiana troostiana
20.7 mm |
Pleurocera
troostiana edgariana
18.4 mm |
Pleurocera
troostiana lyonii
23.9 mm |
Pleurocera
troostiana perstriata
19.0 mm |
Pleurocera canaliculata canaliculata
38.0 mm |
Pleurocera
canaliculata pyrenellum
24.8 mm |
Pleurocera nassula
16.7 mm |
Pleurocera catenaria catenaria
17.4 mm |
Pleurocera modesta
15.9 mm |
Pleurocera simplex ebenum
15.6 mm |
Pleurocera
simplex simplex
17.6 mm |
Pleurocera
gabbiana
14.4 mm |
Pleurocera laqueata
laqueata
19.4 mm
|
Pleurocera laqueata alveare
19.6 mm |
Pleurocera laqueata castanea
16.2 mm |
Pleurocera proxima
17.7 mm | 
Pleurocera semicarinata semicarinata
17.8 mm | |
| Pomatiopsidae |
Pomatiopsis cincinnatiensis
5.2 mm |
|
Pomatiopsis lapidaria
5.7 mm |
| Hydrobioids |
Amnicola limosa
3.8mm |
Lyogyrus granum
2.6 mm |
Birgella subglobosa
7.7 mm |
Cincinnatia integra
4.5 mm |
|
Probythinella
emarginata
3.1 mm |
Somatogyrus
currierianus currierianus
4.4 mm |
Somatogyrus
currierianus umbilicata
3.9 mm |
Somatogyrus virginicus
3.6 mm |
Marstonia
arga
2.2 mm |
Marstonia
pachyta pachyta
3.0 mm |
Marstonia pachyta angulobasis
2.4 mm |
Marstonia
olivacea
3.9 mm |
Marstonia scalariformis
3.2 mm |
Holsingeria
unthanksensis
3.7 mm |
Fontigens nickliniana
3.6 mm |
Fontigens orolibas
3.1 mm |
Fontigens hershleri
2.4 mm |
| Lymnaeidae |
Lymnea columella
10.4 mm |
Lymnaea humilis
5.9 mm |
Lymnaea
cubensis/viator
7.4 mm |
| Physidae |
Physa acuta
8.3 mm |
Physa pomilia
6.7 mm |
Physa gyrina
11.5 mm |
| Planorbidae |
Helisoma trivolvis
18.5 mm |
Helisoma anceps
8.4 mm |
Planorbula armigera
7.1 mm |
Gyraulus parvus
2.9 mm |
|
Menetus dilatatus
2.4 mm |
| Ancylidae |
Ferrissia rivularis
4.5 mm |
Ferrissia
fragilis
3.1 mm |
Laevapex fuscus
5.9 mm |
