Stygobromus tenuis (Smith, 1874)
Taxonomy
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Malacostraca |
| Order | Amphipoda |
| Family | Crangonyctidae |
| Genus | Stygobromus |
| Species | Stygobromus tenuis (Smith, 1874) |
Synonyms
- Stygonectes tenuis (prior combination, ITIS)
Description
Diagnostic characters
- Ecological class
- Stygobiont
- Realm
- Aquatic
- Troglomorphy
- Troglomorphic
Distribution
Type locality
wells at Middletown, Middlesex Co. CT
Range
Known from 28 counties across eight states across two karst regions.
Continent
North America
Country
United States
States and provinces
Connecticut, District of Columbia, Massachusetts, Maryland, New York, Pennsylvania, Virginia, West Virginia
Counties
- Connecticut
- Fairfield, Litchfield, Middlesex, New Haven
- Massachusetts
- Berkshire
- Maryland
- Anne Arundel, Baltimore, Calvert, Cecil, Dorchester, Frederick, Harford, Howard, Montgomery, Prince George's, Prince Georges, Talbot, Washington
- Pennsylvania
- Adams
- Virginia
- Arlington, Caroline, Fairfax, Fauquier, James City, Loudoun, Northampton, Prince William
- West Virginia
- Jefferson
Karst regions
Appalachians, Other
Genetics
Molecular resources
| Marker | Molecule | Sequences | Length | Exemplar |
|---|---|---|---|---|
| 28S | nuclear | 46 | 377-835 bp | PZ240810.1 |
| COI | mitochondrial | 28 | 534-1539 bp | PZ235420.1 |
| 18S | nuclear | 13 | 610-611 bp | OR530141.1 |
| H3 | nuclear | 13 | 329-329 bp | OR506371.1 |
| mitogenome | mitochondrial | 2 | 14712-14915 bp | MN175621.1 |
102 sequences, retrieved 23 August 2026. Counts change as sequences are deposited. Search GenBank.
Download all 102 sequence records (CSV) Accession, marker, molecule type, length, GenBank definition and a direct link.
- Mitogenome
- Available
Specimens
Type material
- Holotype
- USNM 141760 · National Museum of Natural History, Smithsonian Institution
- Allotype
- USNM 141761 · National Museum of Natural History, Smithsonian Institution
- Lectotype
- YPM IZ 004538.CR · Yale Peabody Museum
- Syntype
- YPM IZ 004537.CR · Yale Peabody Museum
- Paratype ×24
- National Museum of Natural History, Smithsonian Institution
- Type
- YPM IZ 004536.CR · Yale Peabody Museum
Collections holding material
| Institution | Lots |
|---|---|
| National Museum of Natural History, Smithsonian Institution | 282 |
| Museum of Comparative Zoology, Harvard | 6 |
| Yale Peabody Museum | 4 |
292 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 292 specimen records (CSV) Institution, catalog number, type status and preparation. No coordinates.
Conservation and management
NatureServe
G4 Apparently Secure
Global rank last reviewed 21 August 2002.
Subnational ranks
- Connecticut
- S3 Vulnerable
- District of Columbia
- SNR Unranked
- Massachusetts
- S1 Critically Imperiled
- New York
- SNR Unranked
- Pennsylvania
- SNR Unranked
- Virginia
- S4 Apparently Secure
- West Virginia
- S2 Imperiled
- Maryland
- SNR Unranked
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
- Aunins, A.W., Nelms, D.L., Hobson, C.S. & King, T.L. 2016. Comparative mitogenomic analyses of three North American stygobiont amphipods of the genus Stygobromus (Crustacea: Amphipoda). Mitochondrial DNA Part B 1: 560–563. doi:10.1080/23802359.2016.1174086
- Banta, A.M. 1907. The fauna of Mayfield's Cave. Carnegie Institution of Washington Publication 67: 1–114. https://www.biodiversitylibrary.org/item/60987. details
- Benito, J.B., Porter, M.L. & Niemiller, M.L. 2021. The mitochondrial genomes of five spring and groundwater amphipods of the family Crangonyctidae (Crustacea: Amphipoda) from eastern North America. Mitochondrial DNA Part B 6: 1662–1667. doi:10.1080/23802359.2021.1926350
- 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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