Onondaga Cave Amphipod
Stygobromus onondagaensis (Hubricht & Mackin, 1940)
Taxonomy
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Malacostraca |
| Order | Amphipoda |
| Family | Crangonyctidae |
| Genus | Stygobromus |
| Species | Stygobromus onondagaensis (Hubricht & Mackin, 1940) |
Synonyms
- Crangonyx onondagaensis Hubricht & Mackin, 1940 (prior combination, CoL)
Description
Diagnostic characters
- Ecological class
- Stygobiont
- Realm
- Aquatic
- Troglomorphy
- Troglomorphic
Distribution
Range
Known from 30 counties across four states across two karst regions.
Continent
North America
Country
United States
States and provinces
Arkansas, Kansas, Missouri, Oklahoma
Counties
- Arkansas
- Benton
- Kansas
- Butler, Cowley
- Missouri
- Camden, Carter, Crawford, Dent, Franklin, Howell, Lawrence, Madison, McDonald, Miller, Morgan, Oregon, Ozark, Phelps, Pulaski, Shannon, St. Francois, Taney, Texas, Washington, Wayne
- Oklahoma
- Adair, Cherokee, Delaware, Mayes, Ottawa, Rogers
Karst regions
Other, Ozarks
Specimens
Type material
- Syntype
- USNM 77800 · National Museum of Natural History, Smithsonian Institution
Collections holding material
| Institution | Lots |
|---|---|
| National Museum of Natural History, Smithsonian Institution | 58 |
| Field Museum of Natural History | 2 |
| Royal Ontario Museum | 1 |
61 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 61 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
G3 Vulnerable
Global rank last reviewed 22 January 2009.
Subnational ranks
- Arkansas
- S1 Critically Imperiled
- Kansas
- SNR Unranked
- Missouri
- S3 Vulnerable
- Oklahoma
- S2 Imperiled
Ranks looked up 23 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
References
- Holsinger, J.R. & Lewis, J.J. 2025. Systematics of the subterranean amphipod genus Stygobromus (Crangonyctidae): Species of the Ozarks and adjacent regions. Journal of Cave and Karst Studies 87: 34–81. doi:10.4311/2024LSC0113
- Hubricht, L. 1943. Studies in the Nearctic freshwater amphipods, III. Notes on the freshwater Amphipoda of eastern United States, with descriptions of ten new species. The American Midland Naturalist 29: 683–712. doi:10.2307/2421157
- Nicholas, G. 1960. Checklist of macroscopic troglobitic organisms of the United States. The American Midland Naturalist 64: 123–160. doi:10.2307/2422897
This account was last revised 28 August 2026. Conservation ranks were looked up 23 August 2026.
How to cite this account
Data sources and funding are listed in the Acknowledgments.
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