Singley's Subterranean Discus Snail
Lucilla singleyana (Pilsbry, 1889)
Taxonomy
| Kingdom | Animalia |
|---|---|
| Phylum | Mollusca |
| Class | Gastropoda |
| Order | Stylommatophora |
| Family | Helicodiscidae |
| Genus | Lucilla |
| Species | Lucilla singleyana (Pilsbry, 1889) |
Description
Diagnostic characters
- Ecological class
- Trogloxene
- Realm
- Terrestrial
Distribution
Range
Known from eight counties across two states.
Continent
North America
Country
United States
States and provinces
Illinois, Tennessee
Counties
- Illinois
- Monroe
- Tennessee
- Coffee, Cumberland, Franklin, Grundy, Marion, Sequatchie, Warren
Conservation and management
NatureServe
G5 Secure
National ranks
- Canada
- NU
- United States
- N5 Secure
Subnational ranks
- Ontario
- SU Unrankable
- West Virginia
- S2 Imperiled
- Nebraska
- SX Presumed Extirpated
- Alabama
- SX Presumed Extirpated
- Arkansas
- SNR Unranked
- Iowa
- SNR Unranked
- Texas
- S4 Apparently Secure
- Virginia
- S3 Vulnerable
- Illinois
- SNR Unranked
- Indiana
- SNR Unranked
- Kentucky
- S2 Imperiled
- Delaware
- SNR Unranked
- Oklahoma
- SNR Unranked
- Pennsylvania
- S4 Apparently Secure
- Maryland
- SNR Unranked
- Kansas
- SNR Unranked
- Louisiana
- SNR Unranked
- New Jersey
- S2 Imperiled
- Michigan
- SNR Unranked
- New York
- SNR Unranked
- Wisconsin
- SU Unrankable
- Tennessee
- SNA Not Applicable
- Arizona
- SNR Unranked
- Ohio
- SNR Unranked
- South Dakota
- SNR Unranked
- California
- SNA Not Applicable
- New Mexico
- SNR Unranked
- Missouri
- S1 Critically Imperiled
Ranks looked up 3 September 2026. Conservation status changes, and a rank here is as current as that date and no more.
State and federal status
Not listed under the U.S. Endangered Species Act.
References
- Lewis, J.J. 2005a. A biological inventory of caves of the Cumberland Plateau. Tennessee Chapter Cave Program, The Nature Conservancy, Nashville, Tennessee, USA. 156 pp.
- Lewis, J.J., Moss, P., Tecic, D. & Nelson, M.E. 2003. A conservation focused inventory of subterranean invertebrates of the southwestern Illinois karst. Journal of Cave and Karst Studies 65: 9–21.
This account was last revised 6 September 2026. Conservation ranks were looked up 3 September 2026.
How to cite this account
Lucilla singleyana (Pilsbry, 1889). Cave Biology Data Portal, account SP-1813. https://cavebiology.org/species/lucilla-singleyana/ (accessed 22 October 2026).
Data sources and funding are listed in the Acknowledgments.
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