Grady's Cave Amphipod
Stygobromus gradyi Holsinger, 1974
Taxonomy
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Malacostraca |
| Order | Amphipoda |
| Family | Crangonyctidae |
| Genus | Stygobromus |
| Species | Stygobromus gradyi Holsinger, 1974 |
Description
Diagnostic characters
- Ecological class
- Stygobiont
- Realm
- Aquatic
- Troglomorphy
- Troglomorphic
Distribution
Range
Known from three counties in California across two karst regions.
Continent
North America
Country
United States
States and provinces
California
Counties
- California
- Amador, Calaveras, Tuolumne
Karst regions
Mother Lode, Other
Specimens
Type material
- Holotype
- USNM 142780 · National Museum of Natural History, Smithsonian Institution
- Paratype
- USNM 1529973 · National Museum of Natural History, Smithsonian Institution
Collections holding material
| Institution | Lots |
|---|---|
| National Museum of Natural History, Smithsonian Institution | 7 |
| California Academy of Sciences | 2 |
9 cataloged lots in 2 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
Assessed in 1996.
NatureServe
G1 Critically Imperiled
Global rank last reviewed 10 January 2013.
Subnational ranks
- California
- S1 Critically Imperiled
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.
Other resources
This account was last revised 28 August 2026. Conservation ranks were looked up 2 August 2026.
How to cite this account
Data sources and funding are listed in the Acknowledgments.
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