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The Freshwater Gastropods of Virginia

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Virginia Atlantic Drainages

Viviparidae

Campeloma decisum
24.5 mm

Bellamya japonica
55.4 mm

Viviparus georgianus
25.0mm

Pleuroceridae

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

Hydrobiidae

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

Bithyniidae

Bithynia tentaculata
11.7 mm

Lymnaeidae

Lymnaea columella
10.4 mm

Lymnaea humilis
5.9 mm

Physidae

Physa acuta 8.3 mm	Physa pomilia 6.7 mm	Physa species A 12.0 mm
	Physa gyrina 11.5 mm

Planorbidae

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	Promenetus exacuous 2.9 mm
	Planorbula armigera 7.1 mm

Ancylidae

Ferrissia rivularis
4.6 mm

Hebetancylus excentricus

Hebetancylus excentricus
7.2 mm

Laevapex fuscus
5.9 mm

Robert T. Dillon, Jr.
Department of Biology, College of Charleston
Charleston, SC 29424
P: 843.953.8087
F: 843.953.5453