Hay's Spring Amphipod
Stygobromus hayi (Hubricht & Mackin, 1940)
Taxonomy
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Malacostraca |
| Order | Amphipoda |
| Family | Crangonyctidae |
| Genus | Stygobromus |
| Species | Stygobromus hayi (Hubricht & Mackin, 1940) |
Synonyms
- Stygonectes hayi (Hubricht & Mackin, 1940) (prior combination, CoL)
- Synpleonia hayi Hubricht & Mackin, 1940 (prior combination, CoL)
Description
Diagnostic characters
- Ecological class
- Stygobiont
- Realm
- Aquatic
- Troglomorphy
- Troglomorphic
Distribution
Range
Known from two counties across two states in the Other karst region.
Continent
North America
Country
United States
States and provinces
District of Columbia, Pennsylvania
Counties
- Pennsylvania
- Centre, Fayette
Karst regions
Other
Genetics
Molecular resources
| Marker | Molecule | Sequences | Length | Exemplar |
|---|---|---|---|---|
| 28S | nuclear | 4 | 425-834 bp | OR530144.1 |
| COI | mitochondrial | 3 | 535-535 bp | OR506966.1 |
| 18S | nuclear | 2 | 610-610 bp | OR530127.1 |
| H3 | nuclear | 2 | 329-329 bp | OR506359.1 |
11 sequences, retrieved 23 August 2026. Counts change as sequences are deposited. Search GenBank.
Download all 11 sequence records (CSV) Accession, marker, molecule type, length, GenBank definition and a direct link.
Specimens
Type material
- Syntype ×3
- National Museum of Natural History, Smithsonian Institution
Collections holding material
| Institution | Lots |
|---|---|
| National Museum of Natural History, Smithsonian Institution | 10 |
| Field Museum of Natural History | 1 |
11 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 11 specimen records (CSV) Institution, catalog number, type status and preparation. No coordinates.
Conservation and management
IUCN Red List
EN Endangered B1+2c
Assessed in 1996.
NatureServe
G1G2 Critically Imperiled to Imperiled
Global rank last reviewed 21 August 2002.
Subnational ranks
- District of Columbia
- S1 Critically 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
Endangered under the U.S. Endangered Species Act, listed in 1982.
Federal: Endangered
Other resources
References
- 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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