Table 1

The 40 freshwater gastropod species and subspecies confirmed from Virginia Atlantic drainages are listed in the left column below, together with those expected from the historical review of Stewart & Dillon (2004), listing common synonyms.  Also reported are the actual number of records in our Virginia database and FWGNA incidence ranks.  The suffix "p" marks peripheral species, and asterisks* mark species demonstrating non-apparent rarity.

Species
Records
FWGNA
Stewart & Dillon (2004)
Other common synonyms
Amnicola limosa34I-5A. limosus -
Aplexa hypnorum
0 I-1pA. elongata
 -
Bellamya chinensis0 I-4Cipangopaludina chinensis C. maleata
Bellamya japonica
15
I-4  Cipangopaludina japonica
Bithynia tentaculata5I-3pB. tentaculata -
Campeloma decisum
241
I-5C. decisum C. integra, C. rufrum
Ferrissia fragilis 158
I-5F. fragilis F. walkeri
Ferrissia rivularis 57
I-5F. rivularis, F. parallela -
Fontigens bottimeri 2
I-3*F. bottimeri -
Fontigens morrisoni3I-2F. morrisoni -
Fontigens nickliniana 21
I-4F. nickliniana -
Fontigens orolibas23I-4*F. orolibas -
Fontigens tartarea
2
I-2 
 
Gillia altilis3I-4G. altilis -
Gyraulus deflectus 1
I-3pG. deflectus -
Gyraulus parvus42I-5G. parvus -
Hebetancylus excentricus 2
I-3p  -
Helisoma anceps183I-5H. anceps -
Helisoma trivolvis
37I-5Planorbella trivolvis -
Holsingeria unthanksensis
1I-1Holsingeria sp. 1 -
Laevapex fuscus53I-5L. fuscusL. diaphanus
Leptoxis carinata 365
I-5L. carinata -
Lioplax subcarinata 7
I-4L. subcarinata -
Littoridinops tenuipes
7
I-4L. tenuipes -
Lymnaea columella 128
I-5Pseudosuccinea columella -
Lymnaea humilis
100
I-5Fossaria spp.Galba humilis, G. obrussa, G. exigua, G. parva, G. dalli
Lymnaea neopalustris0 -Stagnicola neopalustris
 -
Lyogyrus granum
69
I-5L. granumAmnicola grana, L. pupoideus
Menetus dilatatus 199
I-5 Micromenetus dilatatus,
M. brogniartianus
 -
Physa acuta
232
I-5Physella acutaPhysella heterostropha, P. integra
Physa carolinae
21
I-4  -
Physa gyrina62I-5Physella gyrinaP. ancillaria
Physa pomilia35I-4-
Physella pomilia, P. hendersoni
Planorbula armigera
3
I-4P. armigera -
Pleurocera catenaria catenaria 18 I-5 Elimia catenaria
Pleurocera catenaria dislocata 8 I-5 Elimia dislocata
Pleurocera proxima
39
I-5Elimia proximaE. symmetrica
Pleurocera shenandoa 20
I-3pElimia semicarinata 
Pleurocera virginica 84 I-5 Elimia virginica  -
Pomatiopsis lapidaria1I-3pP. lapidaria -
Promenetus exacuous
5
I-4P. exacuous -
Somatogyrus virginicus8I-4S. virginicus -
Valvata bicarinata0 I-4V. bicarinata -
Valvata tricarinata 2
I-3pV. tricarinata -
Viviparus georgianus 1
I-4V. georgianus -
TOTAL 2,294         

    

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