Skip to content

Cave Biology Data Portal

Subterranean biodiversity of North America and around the globe

  • ExploreExpand
    • Species
    • Taxonomy
    • States and Provinces
    • Karst Regions
    • Caves You Can Visit
  • ResourcesExpand
    • Funding Opportunities
    • Employment Opportunities
    • Meeting and Events
    • Public Notices
    • News and Updates
  • ContributeExpand
    • Report an Observation
    • Add a Photograph or Image
    • Post an Event
    • Post an Opportunity
    • Add a Reference
    • Add a New Species
    • Report a Correction
  • AboutExpand
    • Acknowledgments
    • Data Sensitivity Policy
    • Citation and Licensing
  • ContactExpand
    • Data Requests
Cave Biology Data Portal
Subterranean biodiversity of North America and around the globe
AnimaliaArthropodaCrustaceaMalacostracaIsopodaAsellidaeCaecidotea

Nickajack Cave Isopod
Caecidotea nickajackensis Packard, 1881

Taxonomy

Kingdom Animalia
Phylum Arthropoda
Subphylum Crustacea
Class Malacostraca
Order Isopoda
Family Asellidae
Genus Caecidotea
Species Caecidotea nickajackensis Packard, 1881

Synonyms

Conasellus nickajackensis (Packard, 1881)

Description

Diagnostic characters

Ecological class
Stygobiont
Realm
Aquatic
Troglomorphy
Troglomorphic

Distribution

Type locality

Nickajack Cave, Marion Co. TN

Range

Known from two states in the Interior Low Plateau karst region.

Continent

North America

Country

United States

States and provinces

Alabama, Tennessee

Counties

County-level records have not been compiled for this taxon. Distribution is recorded at state and karst-region level.

Karst regions

Interior Low Plateau

Specimens

Collections holding material

InstitutionLots
Field Museum of Natural History 4
National Museum of Natural History, Smithsonian Institution 4
Museum of Comparative Zoology, Harvard 1

9 cataloged lots in 3 collections. Compiled from GBIF and not an exhaustive census: many collections are not yet digitised, and holdings are added continually. Search GBIF for specimen records.

Download all 9 specimen records (CSV) Institution, catalog number, type status and preparation. No coordinates.

Conservation and management

IUCN Red List

VU Vulnerable D2

EXEWCRENVU▲NTLC

Assessed in 1996.

NatureServe

G1 Critically Imperiled

G1▲G2G3G4G5

Global rank last reviewed 19 October 2021.

Subnational ranks

Alabama
SNR Unranked
Georgia
SNR Unranked
Tennessee
S1 Critically Imperiled
Virginia
S1 Critically Imperiled

State and federal status

Not listed under the U.S. Endangered Species Act

Other resources

Catalogue of Life
P7QK
GBIF
2205839
ITIS
92751
iNaturalist
96397

How to cite this account

Caecidotea nickajackensis Packard, 1881. Cave Biology Data Portal, account SP-1232. https://cavebiology.org/species/caecidotea-nickajackensis/ (accessed 3 September 2026).

Data sources and funding are listed in the Acknowledgments.

Spotted something wrong on this page? Report a correction. Accounts are compiled from many sources and corrections from people who know the group are the most useful email we get.

Cave Biology Data Portal

Species accounts, distributions, and conservation status for the subterranean fauna of North America and around the globe, with resources for the cave and karst research community.

Text and data CC BY 4.0. Images all rights reserved unless stated.

Explore

  • Browse
  • Taxonomy

Resources

  • Funding
  • Employment
  • Contribute

About this site

  • About Us
  • Acknowledgments
  • Contact Us
  • Data Sensitivity Policy
  • Citation and Licensing
  • Accessibility Statement
  • Privacy Policy
  • Cookies Policy
  • Terms and Conditions
  • Explore
    • Species
    • Taxonomy
    • States and Provinces
    • Karst Regions
    • Caves You Can Visit
  • Resources
    • Funding Opportunities
    • Employment Opportunities
    • Meeting and Events
    • Public Notices
    • News and Updates
  • Contribute
    • Report an Observation
    • Add a Photograph or Image
    • Post an Event
    • Post an Opportunity
    • Add a Reference
    • Add a New Species
    • Report a Correction
  • About
    • Acknowledgments
    • Data Sensitivity Policy
    • Citation and Licensing
  • Contact
    • Data Requests