Black Mountain Disc
Discus nigrimontanus (Pilsbry, 1924)

Taxonomy

Kingdom	Animalia
Phylum	Mollusca
Class	Gastropoda
Order	Stylommatophora
Family	Discidae
Genus	Discus
Species	Discus nigrimontanus (Pilsbry, 1924)

Description

Diagnostic characters

Ecological class: Trogloxene
Realm: Terrestrial

Distribution

Range

Known from one county in Tennessee.

Continent

North America

Country

United States

States and provinces

Tennessee

Counties

Tennessee: Fentress

Conservation and management

NatureServe

G4 Apparently Secure

National ranks

United States: N4 Apparently Secure

Subnational ranks

Tennessee: S4 Apparently Secure
Arkansas: SNR Unranked
North Carolina: S2 Imperiled
Missouri: S3 Vulnerable
Kentucky: S1 Critically Imperiled
Alabama: S1 Critically Imperiled
Virginia: SU Unrankable

Ranks looked up 2 August 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.

This account was last revised 6 September 2026. Conservation ranks were looked up 2 August 2026.

How to cite this account

Discus nigrimontanus (Pilsbry, 1924). Cave Biology Data Portal, account SP-2390. https://cavebiology.org/species/discus-nigrimontanus/ (accessed 22 October 2026).

Data sources and funding are listed in the Acknowledgments.

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