Arkansas Freshwater Snail (Mollusca: Gastropoda) Checklist
Constructed by David M. Hayes
Environmental Sciences Doctoral Student
Contact Info - david.hayes@smail.astate.edu
Web designed by Kentaro Inoue
Contact Info - kentaro.inoue@smail.astate.edu
Family |
Scientific Name |
Rank |
Picture |
Comments |
|
State |
Global |
||||
| Pleuroceridae | Elimia potosiensis |
SU |
G5 |
||
| Leptoxis arkansensis |
S1? |
G1 |
|||
| Lithasia verrucosa |
S2 |
G2G3 |
|||
| Pleurocera acuta |
SU |
G5 |
|||
| Pleurocera alveare |
SU |
G3 |
|||
| Pleurocera canaliculatum |
SU |
G5 |
|||
| Viviparidae | Campeloma crassulum |
SU |
G5 |
||
| Campeloma decisum |
SU |
G5 |
|||
| Lioplax sulculosa |
SU |
G5 |
|||
| Viviparus georgianus |
SU |
G5 |
|||
| Viviparus intertextus |
SU |
G4 |
|||
| Viviparus subpurpereus |
SU |
G5 |
|||
| Hydrobiidae | Cincinnatia integra |
SU |
G5 |
||
| Probythinella emarginata |
SU |
G5 |
|||
| Maristonia ozarkensis |
S1? |
G1 |
|||
| Somatogyrus crassilabris |
SX |
GX |
Endemic to North Fork, White R., Baxter Co. | ||
| Birgella subglobosus |
SU |
G4 |
|||
| Somatogyrus wheeleri |
SX |
GX |
Ouachita R., Clark Co. | ||
| Somatogyrus amnicoloides | SX |
GX |
|||
| Amnicola cora |
S1 |
G1-G2 |
Endemic to Foushee Cave, Independence Co. | ||
| Pomatiopsidae | Pomatiopsis lapidaria |
SU |
G5 |
||
| Valvatidae | Valvata bicarinata |
SU |
G5 |
||
| Valvata tricarinata |
SU |
G5 |
|||
| Lymnaeidae | Pseudosuccinea columella |
SU |
G5 |
||
| Fossaria obrussa |
SU |
G5 |
|||
| Fossaria bulimoides |
SU |
G5 |
|||
| Physidae | Physa acuta |
SU |
G5 |
||
| Physa gyrina |
SU |
G5 |
|||
| Planorbidae | Gyraulus parvus |
SU |
G5 |
||
| Promenetus exacuous |
SU |
G5 |
|||
| Micromenetus dilatatus |
SU |
G5 |
|||
| Micromenetus sampsoni |
S1 |
G3G4 |
|||
| Helisoma anceps |
SU |
G5 |
|||
| Planorbella trivolvis |
SU |
G5 |
|||
| Ancylidae | Laevapex fuscus |
SU |
G5 |
||
| Ferrissia rivularus |
SU |
G5 |
|||
| Ferrissia fragilis |
SU |
G5 |
|||
| Ferrissia walkeri |
SU |
G4G5 |
|||
List was generated from museum holdings, review of relevant literature, and collections housed at Arkansas State University Mollusk Collection. We will periodically be updating this page with more photos and revisions to the list. We will also be adding distribution maps and a key in the future.
State Ranking and Global Heritage Ranks according to www.natureserve.org and www.wildlifearkansas.gov when available.
Arkansas State Heritage Program Ranking Codes (2004)
State Ranks |
Narrative |
|---|---|
S1 |
Extremely rare. Typically 5 or few estimated occurrences in the state, or only a few remaining individuals; may be vulnerable to extirpation. |
S2 |
Vary rare. Typically between 5 and 20 estimated occurrences or with many individuals in few occurrences, often susceptible to becoming extirpated. |
S3 |
Rare to uncommon. Typically between 20 - 100 estimated occurrences, may have fewer occurrences, but with large number of individuals in some populations; may be susceptible to large-scale disturbances. |
S4 |
Common, apparently secure under present conditions. Typically between 100 or more estimated occurrences, but may have fewer with many large populations; may be restricted to only a portion of the state; usually not susceptible to immediate threats. |
S5 |
Demonstrably widespread, common, and secure in the state and essentially ineradicable under present conditions. |
SA |
Accidental |
SH |
Historically known from the state, but not verified for an extended period of time, usually 15 years. |
SU |
Possibly in peril in state, but status not certain; more information is needed. |
SX |
Apparently extirpated from state. |
SZ |
Zero occurrences. Not of practical conservation concern in the state because there are no definable occurrences, although the taxon is native and appears regularly in the state. |
Global Ranks |
Narrative |
|---|---|
G1 |
Critically imperiled globally because of extreme rarity (≤5 occurrences or very few remaining individuals or acres); or because of some factor(s) making it especially vulnerable to extinction. |
G2 |
Imperiled globally because of rarity (6-20 occurrences or few remaining individuals or acres); or because of some factor(s) making it especially vulnerable to extinction. |
G3 |
Either very rare (in the range of 21-100) and local throughout its range or found locally (even abundantly as some of its locations) in a restricted range (e.g. a single western state; a physiographic region in the East); or because of other factor(s) making it vulnerable to extinction throughout its range. |
G4 |
Apparently secure globally, though it may be quite rare in parts of its range, especially at the periphery. |
G5 |
Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery. |
GH |
Of historical occurrence throughout its range( i.e. formally part of the established biota with the expectation that it may be rediscovered (e.g. Bachman's Warbler)). |
GU |
Possibly in peril range wide, but status uncertain; more information is needed. |
GX |
Believed to be extinct throughout range (e.g. Passenger Pigeon) with virtually no likelihood that it will be rediscovered. |
Federal Status Codes
Federal Status |
Narrative |
|---|---|
E |
Endangered |
T |
Threatened |
SC |
Special concern |
CS |
Currently stable |
Last Updated : Feburary 12, 2006
Pictures may only be used with permission from David Hayes (david.hayes@smail.astate.edu).
Links to other freshwater snail identification resources -
The Freshwater Snails of Florida by Fred G. Thompson
