Table 1

The freshwater gastropod species of North Carolina Atlantic drainages are listed in the left column below, ordered by their record total in our database, together with FWGNA incidence ranks.  The suffix "p" designates peripheral species.  This list is compared to the checklist of Dawley (1965), with synonyms and other unconfirmed species subsequently reported for the state (Johnson et al., 2013).

Confirmed in this study
Records
FWGNA
Dawley (1965)
Other synonyms and subsequent reports.
Physa acuta
625
I-5 Physa heterostropha Physella heterostropha, Physella integra
Ferrissia fragilis 576 I-5 F. fragilis F. walkeri
Campeloma decisum
555
I-5 C. decisum, C. geniculum, C. lewisii, C. rufrum C. integra
Menetus dilatatus
487
I-5 M. dilatatus, M. alabamensis Micromenetus dilatatus
Lymnaea columella 366 I-5 Pseudosuccinea columella  -
Helisoma anceps
306
I-5 H. anceps  -
Laevapex fuscus
257
I-5 L. fuscus, L. diaphanus  -
Pleurocera proxima 257 I-5 Goniobasis proxima, G. symmetrica Elimia proxima, E. symmetrica
Pleurocera catenaria catenaria
P. catenaria dislocata
(combined)
106
40
I-5 - Elimia catenaria
Goniobasis catenaria dislocata Elimia dislocata
Amnicola limosa 133 I-5 A. limosa  -
Lyogyrus granum 105 I-5 L. granum, L. dalli  -
Leptoxis carinata
105
I-5 Nitocris carinata  -
Helisoma trivolvis
92
I-5  - Planorbella trivolvis
Somatogyrus virginicus
49
I-4 S. virginicus  -
Lymnaea humilis
47
I-5 Fossaria modicella Galba humilis, G. obrussa, G. parva, G. exigua 
Planorbula armigera
38
I-4 -  -
Gillia altilis
34
I-4 G. altilis, G. crenata  -
Pleurocera virginica 32 I-5 Goniobasis virginica Elimia virginica
Gyraulus parvus 32 I-5 -  -
Physa carolinae
29
I-4 -  -
Lioplax subcarinata 26 I-4 L. subcarinata  -
Promenetus exacuous
19
I-4 -  -
Physa pomilia 19 I-4 P. pomilia Physella pomilia, P. hendersoni
Littoridinops tenuipes 18 I-4 -  -
Lymnaea cubensis 13 I-4 - Galba cubensis
Ferrissia rivularis12I-5F. rivularis -
Viviparus intertextus
8
I-4 -  -
Physa gyrina
7
I-4 P. inflata Physella gyrina, P. ancillaria
Valvata bicarinata
5
I-4 V. bicarinata  -
Bellamya japonica
4
I-4 -  Cipangopaludina japonica
Floridobia sp. (Waccamaw) 4 I-2 -
 -
Hebetancylus excentricus
3
I-3p -  -
Helisoma magnificum 3 I-2 H. magnificum Planorbella magnifica
Helisoma eucosmium
3
I-2 -  -
Melanoides tuberculata1I-2p- -
Viviparus georgianus1I-4- -
Fontigens nickliniana 0 I-4 -  -
Pomatiopsis lapidaria 0 I-3p -  -
Pomacea paludosa 0 I-2p -  -
Gyraulus deflectus 0 I-3p -  -
 Helisoma duryi 0   - Planorbella duryi
 Probithynia emarginata 0   - Probythinella emarginata
 Valvata sincera 0   - Valvata sincera
TOTAL4,418


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